8 * Determine the allowed character set in short URLs
11 function yourls_get_shorturl_charset() {
12 static $charset = null;
13 if( $charset !== null )
16 if( defined('YOURLS_URL_CONVERT') && in_array( YOURLS_URL_CONVERT, array( 62, 64 ) ) ) {
17 $charset = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
19 // defined to 36, or wrongly defined
20 $charset = '0123456789abcdefghijklmnopqrstuvwxyz';
23 $charset = yourls_apply_filter( 'get_shorturl_charset', $charset );
28 * Make an optimized regexp pattern from a string of characters
31 function yourls_make_regexp_pattern( $string ) {
32 $pattern = preg_quote( $string, '-' ); // add - as an escaped characters -- this is fixed in PHP 5.3
33 // TODO: replace char sequences by smart sequences such as 0-9, a-z, A-Z ... ?
38 * Is a URL a short URL? Accept either 'http://sho.rt/abc' or 'abc'
41 function yourls_is_shorturl( $shorturl ) {
42 // TODO: make sure this function evolves with the feature set.
46 // Is $shorturl a URL (http://sho.rt/abc) or a keyword (abc) ?
47 if( yourls_get_protocol( $shorturl ) ) {
48 $keyword = yourls_get_relative_url( $shorturl );
53 // Check if it's a valid && used keyword
54 if( $keyword && $keyword == yourls_sanitize_string( $keyword ) && yourls_keyword_is_taken( $keyword ) ) {
58 return yourls_apply_filter( 'is_shorturl', $is_short, $shorturl );
62 * Check to see if a given keyword is reserved (ie reserved URL or an existing page). Returns bool
65 function yourls_keyword_is_reserved( $keyword ) {
66 global $yourls_reserved_URL;
67 $keyword = yourls_sanitize_keyword( $keyword );
70 if ( in_array( $keyword, $yourls_reserved_URL)
71 or file_exists( YOURLS_ABSPATH ."/pages/$keyword.php" )
72 or is_dir( YOURLS_ABSPATH ."/$keyword" )
76 return yourls_apply_filter( 'keyword_is_reserved', $reserved, $keyword );
80 * Function: Get client IP Address. Returns a DB safe string.
83 function yourls_get_IP() {
86 // Precedence: if set, X-Forwarded-For > HTTP_X_FORWARDED_FOR > HTTP_CLIENT_IP > HTTP_VIA > REMOTE_ADDR
87 $headers = array( 'X-Forwarded-For', 'HTTP_X_FORWARDED_FOR', 'HTTP_CLIENT_IP', 'HTTP_VIA', 'REMOTE_ADDR' );
88 foreach( $headers as $header ) {
89 if ( !empty( $_SERVER[ $header ] ) ) {
90 $ip = $_SERVER[ $header ];
95 // headers can contain multiple IPs (X-Forwarded-For = client, proxy1, proxy2). Take first one.
96 if ( strpos( $ip, ',' ) !== false )
97 $ip = substr( $ip, 0, strpos( $ip, ',' ) );
99 return yourls_apply_filter( 'get_IP', yourls_sanitize_ip( $ip ) );
103 * Get next id a new link will have if no custom keyword provided
106 function yourls_get_next_decimal() {
107 return yourls_apply_filter( 'get_next_decimal', (int)yourls_get_option( 'next_id' ) );
111 * Update id for next link with no custom keyword
114 function yourls_update_next_decimal( $int = '' ) {
115 $int = ( $int == '' ) ? yourls_get_next_decimal() + 1 : (int)$int ;
116 $update = yourls_update_option( 'next_id', $int );
117 yourls_do_action( 'update_next_decimal', $int, $update );
122 * Delete a link in the DB
125 function yourls_delete_link_by_keyword( $keyword ) {
126 // Allow plugins to short-circuit the whole function
127 $pre = yourls_apply_filter( 'shunt_delete_link_by_keyword', null, $keyword );
133 $table = YOURLS_DB_TABLE_URL;
134 $keyword = yourls_escape( yourls_sanitize_string( $keyword ) );
135 $delete = $ydb->query("DELETE FROM `$table` WHERE `keyword` = '$keyword';");
136 yourls_do_action( 'delete_link', $keyword, $delete );
141 * SQL query to insert a new link in the DB. Returns boolean for success or failure of the inserting
144 function yourls_insert_link_in_db( $url, $keyword, $title = '' ) {
147 $url = yourls_escape( yourls_sanitize_url( $url ) );
148 $keyword = yourls_escape( yourls_sanitize_keyword( $keyword ) );
149 $title = yourls_escape( yourls_sanitize_title( $title ) );
151 $table = YOURLS_DB_TABLE_URL;
152 $timestamp = date('Y-m-d H:i:s');
153 $ip = yourls_get_IP();
154 $insert = $ydb->query("INSERT INTO `$table` (`keyword`, `url`, `title`, `timestamp`, `ip`, `clicks`) VALUES('$keyword', '$url', '$title', '$timestamp', '$ip', 0);");
156 yourls_do_action( 'insert_link', (bool)$insert, $url, $keyword, $title, $timestamp, $ip );
158 return (bool)$insert;
162 * Check if a URL already exists in the DB. Return NULL (doesn't exist) or an object with URL informations.
165 function yourls_url_exists( $url ) {
166 // Allow plugins to short-circuit the whole function
167 $pre = yourls_apply_filter( 'shunt_url_exists', false, $url );
168 if ( false !== $pre )
172 $table = YOURLS_DB_TABLE_URL;
173 $url = yourls_escape( yourls_sanitize_url( $url) );
174 $url_exists = $ydb->get_row( "SELECT * FROM `$table` WHERE `url` = '".$url."';" );
176 return yourls_apply_filter( 'url_exists', $url_exists, $url );
180 * Add a new link in the DB, either with custom keyword, or find one
183 function yourls_add_new_link( $url, $keyword = '', $title = '' ) {
184 // Allow plugins to short-circuit the whole function
185 $pre = yourls_apply_filter( 'shunt_add_new_link', false, $url, $keyword, $title );
186 if ( false !== $pre )
189 $url = yourls_encodeURI( $url );
190 $url = yourls_escape( yourls_sanitize_url( $url ) );
191 if ( !$url || $url == 'http://' || $url == 'https://' ) {
192 $return['status'] = 'fail';
193 $return['code'] = 'error:nourl';
194 $return['message'] = yourls__( 'Missing or malformed URL' );
195 $return['errorCode'] = '400';
196 return yourls_apply_filter( 'add_new_link_fail_nourl', $return, $url, $keyword, $title );
200 $ip = yourls_get_IP();
201 yourls_check_IP_flood( $ip );
203 // Prevent internal redirection loops: cannot shorten a shortened URL
204 if( yourls_get_relative_url( $url ) ) {
205 if( yourls_is_shorturl( $url ) ) {
206 $return['status'] = 'fail';
207 $return['code'] = 'error:noloop';
208 $return['message'] = yourls__( 'URL is a short URL' );
209 $return['errorCode'] = '400';
210 return yourls_apply_filter( 'add_new_link_fail_noloop', $return, $url, $keyword, $title );
214 yourls_do_action( 'pre_add_new_link', $url, $keyword, $title );
216 $strip_url = stripslashes( $url );
219 // duplicates allowed or new URL => store it
220 if( yourls_allow_duplicate_longurls() || !( $url_exists = yourls_url_exists( $url ) ) ) {
222 if( isset( $title ) && !empty( $title ) ) {
223 $title = yourls_sanitize_title( $title );
225 $title = yourls_get_remote_title( $url );
227 $title = yourls_apply_filter( 'add_new_title', $title, $url, $keyword );
229 // Custom keyword provided
232 yourls_do_action( 'add_new_link_custom_keyword', $url, $keyword, $title );
234 $keyword = yourls_escape( yourls_sanitize_string( $keyword ) );
235 $keyword = yourls_apply_filter( 'custom_keyword', $keyword, $url, $title );
236 if ( !yourls_keyword_is_free( $keyword ) ) {
237 // This shorturl either reserved or taken already
238 $return['status'] = 'fail';
239 $return['code'] = 'error:keyword';
240 $return['message'] = yourls_s( 'Short URL %s already exists in database or is reserved', $keyword );
242 // all clear, store !
243 yourls_insert_link_in_db( $url, $keyword, $title );
244 $return['url'] = array('keyword' => $keyword, 'url' => $strip_url, 'title' => $title, 'date' => date('Y-m-d H:i:s'), 'ip' => $ip );
245 $return['status'] = 'success';
246 $return['message'] = /* //translators: eg "http://someurl/ added to DB" */ yourls_s( '%s added to database', yourls_trim_long_string( $strip_url ) );
247 $return['title'] = $title;
248 $return['html'] = yourls_table_add_row( $keyword, $url, $title, $ip, 0, time() );
249 $return['shorturl'] = YOURLS_SITE .'/'. $keyword;
252 // Create random keyword
255 yourls_do_action( 'add_new_link_create_keyword', $url, $keyword, $title );
257 $timestamp = date( 'Y-m-d H:i:s' );
258 $id = yourls_get_next_decimal();
261 $keyword = yourls_int2string( $id );
262 $keyword = yourls_apply_filter( 'random_keyword', $keyword, $url, $title );
263 if ( yourls_keyword_is_free($keyword) ) {
264 if( @yourls_insert_link_in_db( $url, $keyword, $title ) ){
265 // everything ok, populate needed vars
266 $return['url'] = array('keyword' => $keyword, 'url' => $strip_url, 'title' => $title, 'date' => $timestamp, 'ip' => $ip );
267 $return['status'] = 'success';
268 $return['message'] = /* //translators: eg "http://someurl/ added to DB" */ yourls_s( '%s added to database', yourls_trim_long_string( $strip_url ) );
269 $return['title'] = $title;
270 $return['html'] = yourls_table_add_row( $keyword, $url, $title, $ip, 0, time() );
271 $return['shorturl'] = YOURLS_SITE .'/'. $keyword;
273 // database error, couldnt store result
274 $return['status'] = 'fail';
275 $return['code'] = 'error:db';
276 $return['message'] = yourls_s( 'Error saving url to database' );
282 @yourls_update_next_decimal( $id );
285 // URL was already stored
288 yourls_do_action( 'add_new_link_already_stored', $url, $keyword, $title );
290 $return['status'] = 'fail';
291 $return['code'] = 'error:url';
292 $return['url'] = array( 'keyword' => $url_exists->keyword, 'url' => $strip_url, 'title' => $url_exists->title, 'date' => $url_exists->timestamp, 'ip' => $url_exists->ip, 'clicks' => $url_exists->clicks );
293 $return['message'] = /* //translators: eg "http://someurl/ already exists" */ yourls_s( '%s already exists in database', yourls_trim_long_string( $strip_url ) );
294 $return['title'] = $url_exists->title;
295 $return['shorturl'] = YOURLS_SITE .'/'. $url_exists->keyword;
298 yourls_do_action( 'post_add_new_link', $url, $keyword, $title );
300 $return['statusCode'] = 200; // regardless of result, this is still a valid request
301 return yourls_apply_filter( 'add_new_link', $return, $url, $keyword, $title );
309 function yourls_edit_link( $url, $keyword, $newkeyword='', $title='' ) {
310 // Allow plugins to short-circuit the whole function
311 $pre = yourls_apply_filter( 'shunt_edit_link', null, $keyword, $url, $keyword, $newkeyword, $title );
317 $table = YOURLS_DB_TABLE_URL;
318 $url = yourls_escape (yourls_sanitize_url( $url ) );
319 $keyword = yourls_escape( yourls_sanitize_string( $keyword ) );
320 $title = yourls_escape( yourls_sanitize_title( $title ) );
321 $newkeyword = yourls_escape( yourls_sanitize_string( $newkeyword ) );
322 $strip_url = stripslashes( $url );
323 $strip_title = stripslashes( $title );
324 $old_url = $ydb->get_var( "SELECT `url` FROM `$table` WHERE `keyword` = '$keyword';" );
326 // Check if new URL is not here already
327 if ( $old_url != $url && !yourls_allow_duplicate_longurls() ) {
328 $new_url_already_there = intval($ydb->get_var("SELECT COUNT(keyword) FROM `$table` WHERE `url` = '$url';"));
330 $new_url_already_there = false;
333 // Check if the new keyword is not here already
334 if ( $newkeyword != $keyword ) {
335 $keyword_is_ok = yourls_keyword_is_free( $newkeyword );
337 $keyword_is_ok = true;
340 yourls_do_action( 'pre_edit_link', $url, $keyword, $newkeyword, $new_url_already_there, $keyword_is_ok );
343 if ( ( !$new_url_already_there || yourls_allow_duplicate_longurls() ) && $keyword_is_ok ) {
344 $update_url = $ydb->query( "UPDATE `$table` SET `url` = '$url', `keyword` = '$newkeyword', `title` = '$title' WHERE `keyword` = '$keyword';" );
346 $return['url'] = array( 'keyword' => $newkeyword, 'shorturl' => YOURLS_SITE.'/'.$newkeyword, 'url' => $strip_url, 'display_url' => yourls_trim_long_string( $strip_url ), 'title' => $strip_title, 'display_title' => yourls_trim_long_string( $strip_title ) );
347 $return['status'] = 'success';
348 $return['message'] = yourls__( 'Link updated in database' );
350 $return['status'] = 'fail';
351 $return['message'] = /* //translators: "Error updating http://someurl/ (Shorturl: http://sho.rt/blah)" */ yourls_s( 'Error updating %s (Short URL: %s)', yourls_trim_long_string( $strip_url ), $keyword ) ;
356 $return['status'] = 'fail';
357 $return['message'] = yourls__( 'URL or keyword already exists in database' );
360 return yourls_apply_filter( 'edit_link', $return, $url, $keyword, $newkeyword, $title, $new_url_already_there, $keyword_is_ok );
364 * Update a title link (no checks for duplicates etc..)
367 function yourls_edit_link_title( $keyword, $title ) {
368 // Allow plugins to short-circuit the whole function
369 $pre = yourls_apply_filter( 'shunt_edit_link_title', null, $keyword, $title );
375 $keyword = yourls_escape( yourls_sanitize_keyword( $keyword ) );
376 $title = yourls_escape( yourls_sanitize_title( $title ) );
378 $table = YOURLS_DB_TABLE_URL;
379 $update = $ydb->query("UPDATE `$table` SET `title` = '$title' WHERE `keyword` = '$keyword';");
386 * Check if keyword id is free (ie not already taken, and not reserved). Return bool.
389 function yourls_keyword_is_free( $keyword ) {
391 if ( yourls_keyword_is_reserved( $keyword ) or yourls_keyword_is_taken( $keyword ) )
394 return yourls_apply_filter( 'keyword_is_free', $free, $keyword );
398 * Check if a keyword is taken (ie there is already a short URL with this id). Return bool.
401 function yourls_keyword_is_taken( $keyword ) {
403 // Allow plugins to short-circuit the whole function
404 $pre = yourls_apply_filter( 'shunt_keyword_is_taken', false, $keyword );
405 if ( false !== $pre )
409 $keyword = yourls_escape( yourls_sanitize_keyword( $keyword ) );
411 $table = YOURLS_DB_TABLE_URL;
412 $already_exists = $ydb->get_var( "SELECT COUNT(`keyword`) FROM `$table` WHERE `keyword` = '$keyword';" );
413 if ( $already_exists )
416 return yourls_apply_filter( 'keyword_is_taken', $taken, $keyword );
424 function yourls_db_connect() {
427 if ( !defined( 'YOURLS_DB_USER' )
428 or !defined( 'YOURLS_DB_PASS' )
429 or !defined( 'YOURLS_DB_NAME' )
430 or !defined( 'YOURLS_DB_HOST' )
431 ) yourls_die ( yourls__( 'Incorrect DB config, or could not connect to DB' ), yourls__( 'Fatal error' ), 503 );
433 // Are we standalone or in the WordPress environment?
434 if ( class_exists( 'wpdb', false ) ) {
435 /* TODO: should we deprecate this? Follow WP dev in that area */
436 $ydb = new wpdb( YOURLS_DB_USER, YOURLS_DB_PASS, YOURLS_DB_NAME, YOURLS_DB_HOST );
438 yourls_set_DB_driver();
441 // Check if connection attempt raised an error. It seems that only PDO does, though.
442 if ( $ydb->last_error )
443 yourls_die( $ydb->last_error, yourls__( 'Fatal error' ), 503 );
445 if ( defined( 'YOURLS_DEBUG' ) && YOURLS_DEBUG === true )
446 $ydb->show_errors = true;
455 function yourls_xml_encode( $array ) {
456 require_once( YOURLS_INC.'/functions-xml.php' );
457 $converter= new yourls_array2xml;
458 return $converter->array2xml( $array );
462 * Return array of all information associated with keyword. Returns false if keyword not found. Set optional $use_cache to false to force fetching from DB
465 function yourls_get_keyword_infos( $keyword, $use_cache = true ) {
467 $keyword = yourls_escape( yourls_sanitize_string( $keyword ) );
469 yourls_do_action( 'pre_get_keyword', $keyword, $use_cache );
471 if( isset( $ydb->infos[$keyword] ) && $use_cache == true ) {
472 return yourls_apply_filter( 'get_keyword_infos', $ydb->infos[$keyword], $keyword );
475 yourls_do_action( 'get_keyword_not_cached', $keyword );
477 $table = YOURLS_DB_TABLE_URL;
478 $infos = $ydb->get_row( "SELECT * FROM `$table` WHERE `keyword` = '$keyword'" );
481 $infos = (array)$infos;
482 $ydb->infos[ $keyword ] = $infos;
484 $ydb->infos[ $keyword ] = false;
487 return yourls_apply_filter( 'get_keyword_infos', $ydb->infos[$keyword], $keyword );
491 * Return (string) selected information associated with a keyword. Optional $notfound = string default message if nothing found
494 function yourls_get_keyword_info( $keyword, $field, $notfound = false ) {
496 // Allow plugins to short-circuit the whole function
497 $pre = yourls_apply_filter( 'shunt_get_keyword_info', false, $keyword, $field, $notfound );
498 if ( false !== $pre )
501 $keyword = yourls_sanitize_string( $keyword );
502 $infos = yourls_get_keyword_infos( $keyword );
505 if ( isset( $infos[ $field ] ) && $infos[ $field ] !== false )
506 $return = $infos[ $field ];
508 return yourls_apply_filter( 'get_keyword_info', $return, $keyword, $field, $notfound );
512 * Return title associated with keyword. Optional $notfound = string default message if nothing found
515 function yourls_get_keyword_title( $keyword, $notfound = false ) {
516 return yourls_get_keyword_info( $keyword, 'title', $notfound );
520 * Return long URL associated with keyword. Optional $notfound = string default message if nothing found
523 function yourls_get_keyword_longurl( $keyword, $notfound = false ) {
524 return yourls_get_keyword_info( $keyword, 'url', $notfound );
528 * Return number of clicks on a keyword. Optional $notfound = string default message if nothing found
531 function yourls_get_keyword_clicks( $keyword, $notfound = false ) {
532 return yourls_get_keyword_info( $keyword, 'clicks', $notfound );
536 * Return IP that added a keyword. Optional $notfound = string default message if nothing found
539 function yourls_get_keyword_IP( $keyword, $notfound = false ) {
540 return yourls_get_keyword_info( $keyword, 'ip', $notfound );
544 * Return timestamp associated with a keyword. Optional $notfound = string default message if nothing found
547 function yourls_get_keyword_timestamp( $keyword, $notfound = false ) {
548 return yourls_get_keyword_info( $keyword, 'timestamp', $notfound );
552 * Update click count on a short URL. Return 0/1 for error/success.
555 function yourls_update_clicks( $keyword, $clicks = false ) {
556 // Allow plugins to short-circuit the whole function
557 $pre = yourls_apply_filter( 'shunt_update_clicks', false, $keyword, $clicks );
558 if ( false !== $pre )
562 $keyword = yourls_escape( yourls_sanitize_string( $keyword ) );
563 $table = YOURLS_DB_TABLE_URL;
564 if ( $clicks !== false && is_int( $clicks ) && $clicks >= 0 )
565 $update = $ydb->query( "UPDATE `$table` SET `clicks` = $clicks WHERE `keyword` = '$keyword'" );
567 $update = $ydb->query( "UPDATE `$table` SET `clicks` = clicks + 1 WHERE `keyword` = '$keyword'" );
569 yourls_do_action( 'update_clicks', $keyword, $update, $clicks );
574 * Return array of stats. (string)$filter is 'bottom', 'last', 'rand' or 'top'. (int)$limit is the number of links to return
577 function yourls_get_stats( $filter = 'top', $limit = 10, $start = 0 ) {
586 $sort_by = 'timestamp';
587 $sort_order = 'desc';
597 $sort_order = 'desc';
602 $limit = intval( $limit );
603 $start = intval( $start );
606 $table_url = YOURLS_DB_TABLE_URL;
607 $results = $ydb->get_results( "SELECT * FROM `$table_url` WHERE 1=1 ORDER BY `$sort_by` $sort_order LIMIT $start, $limit;" );
612 foreach ( (array)$results as $res ) {
613 $return['links']['link_'.$i++] = array(
614 'shorturl' => YOURLS_SITE .'/'. $res->keyword,
616 'title' => $res->title,
617 'timestamp'=> $res->timestamp,
619 'clicks' => $res->clicks,
624 $return['stats'] = yourls_get_db_stats();
626 $return['statusCode'] = 200;
628 return yourls_apply_filter( 'get_stats', $return, $filter, $limit, $start );
632 * Return array of stats. (string)$filter is 'bottom', 'last', 'rand' or 'top'. (int)$limit is the number of links to return
635 function yourls_get_link_stats( $shorturl ) {
638 $table_url = YOURLS_DB_TABLE_URL;
639 $shorturl = yourls_escape( yourls_sanitize_keyword( $shorturl ) );
641 $res = $ydb->get_row( "SELECT * FROM `$table_url` WHERE keyword = '$shorturl';" );
648 'message' => 'Error: short URL not found',
653 'message' => 'success',
655 'shorturl' => YOURLS_SITE .'/'. $res->keyword,
657 'title' => $res->title,
658 'timestamp'=> $res->timestamp,
660 'clicks' => $res->clicks,
665 return yourls_apply_filter( 'get_link_stats', $return, $shorturl );
669 * Get total number of URLs and sum of clicks. Input: optional "AND WHERE" clause. Returns array
671 * IMPORTANT NOTE: make sure arguments for the $where clause have been sanitized and yourls_escape()'d
672 * before calling this function.
675 function yourls_get_db_stats( $where = '' ) {
677 $table_url = YOURLS_DB_TABLE_URL;
679 $totals = $ydb->get_row( "SELECT COUNT(keyword) as count, SUM(clicks) as sum FROM `$table_url` WHERE 1=1 $where" );
680 $return = array( 'total_links' => $totals->count, 'total_clicks' => $totals->sum );
682 return yourls_apply_filter( 'get_db_stats', $return, $where );
686 * Get number of SQL queries performed
689 function yourls_get_num_queries() {
692 return yourls_apply_filter( 'get_num_queries', $ydb->num_queries );
696 * Returns a sanitized a user agent string. Given what I found on http://www.user-agents.org/ it should be OK.
699 function yourls_get_user_agent() {
700 if ( !isset( $_SERVER['HTTP_USER_AGENT'] ) )
703 $ua = strip_tags( html_entity_decode( $_SERVER['HTTP_USER_AGENT'] ));
704 $ua = preg_replace('![^0-9a-zA-Z\':., /{}\(\)\[\]\+@&\!\?;_\-=~\*\#]!', '', $ua );
706 return yourls_apply_filter( 'get_user_agent', substr( $ua, 0, 254 ) );
710 * Redirect to another page
713 function yourls_redirect( $location, $code = 301 ) {
714 yourls_do_action( 'pre_redirect', $location, $code );
715 $location = yourls_apply_filter( 'redirect_location', $location, $code );
716 $code = yourls_apply_filter( 'redirect_code', $code, $location );
717 // Redirect, either properly if possible, or via Javascript otherwise
718 if( !headers_sent() ) {
719 yourls_status_header( $code );
720 header( "Location: $location" );
722 yourls_redirect_javascript( $location );
728 * Set HTTP status header
731 function yourls_status_header( $code = 200 ) {
735 $protocol = $_SERVER['SERVER_PROTOCOL'];
736 if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
737 $protocol = 'HTTP/1.0';
739 $code = intval( $code );
740 $desc = yourls_get_HTTP_status( $code );
742 @header ("$protocol $code $desc"); // This causes problems on IIS and some FastCGI setups
743 yourls_do_action( 'status_header', $code );
747 * Redirect to another page using Javascript. Set optional (bool)$dontwait to false to force manual redirection (make sure a message has been read by user)
750 function yourls_redirect_javascript( $location, $dontwait = true ) {
751 yourls_do_action( 'pre_redirect_javascript', $location, $dontwait );
752 $location = yourls_apply_filter( 'redirect_javascript', $location, $dontwait );
754 $message = yourls_s( 'if you are not redirected after 10 seconds, please <a href="%s">click here</a>', $location );
756 <script type="text/javascript">
757 window.location="$location";
759 <small>($message)</small>
762 echo '<p>' . yourls_s( 'Please <a href="%s">click here</a>', $location ) . '</p>';
764 yourls_do_action( 'post_redirect_javascript', $location );
768 * Return a HTTP status code
771 function yourls_get_HTTP_status( $code ) {
772 $code = intval( $code );
773 $headers_desc = array(
775 101 => 'Switching Protocols',
781 203 => 'Non-Authoritative Information',
783 205 => 'Reset Content',
784 206 => 'Partial Content',
785 207 => 'Multi-Status',
788 300 => 'Multiple Choices',
789 301 => 'Moved Permanently',
792 304 => 'Not Modified',
795 307 => 'Temporary Redirect',
797 400 => 'Bad Request',
798 401 => 'Unauthorized',
799 402 => 'Payment Required',
802 405 => 'Method Not Allowed',
803 406 => 'Not Acceptable',
804 407 => 'Proxy Authentication Required',
805 408 => 'Request Timeout',
808 411 => 'Length Required',
809 412 => 'Precondition Failed',
810 413 => 'Request Entity Too Large',
811 414 => 'Request-URI Too Long',
812 415 => 'Unsupported Media Type',
813 416 => 'Requested Range Not Satisfiable',
814 417 => 'Expectation Failed',
815 422 => 'Unprocessable Entity',
817 424 => 'Failed Dependency',
818 426 => 'Upgrade Required',
820 500 => 'Internal Server Error',
821 501 => 'Not Implemented',
822 502 => 'Bad Gateway',
823 503 => 'Service Unavailable',
824 504 => 'Gateway Timeout',
825 505 => 'HTTP Version Not Supported',
826 506 => 'Variant Also Negotiates',
827 507 => 'Insufficient Storage',
828 510 => 'Not Extended'
831 if ( isset( $headers_desc[$code] ) )
832 return $headers_desc[$code];
839 * Log a redirect (for stats)
842 function yourls_log_redirect( $keyword ) {
843 // Allow plugins to short-circuit the whole function
844 $pre = yourls_apply_filter( 'shunt_log_redirect', false, $keyword );
845 if ( false !== $pre )
848 if ( !yourls_do_log_redirect() )
852 $table = YOURLS_DB_TABLE_LOG;
854 $keyword = yourls_escape( yourls_sanitize_string( $keyword ) );
855 $referrer = ( isset( $_SERVER['HTTP_REFERER'] ) ? yourls_escape( yourls_sanitize_url( $_SERVER['HTTP_REFERER'] ) ) : 'direct' );
856 $ua = yourls_escape( yourls_get_user_agent() );
857 $ip = yourls_escape( yourls_get_IP() );
858 $location = yourls_escape( yourls_geo_ip_to_countrycode( $ip ) );
860 return $ydb->query( "INSERT INTO `$table` (click_time, shorturl, referrer, user_agent, ip_address, country_code) VALUES (NOW(), '$keyword', '$referrer', '$ua', '$ip', '$location')" );
864 * Check if we want to not log redirects (for stats)
867 function yourls_do_log_redirect() {
868 return ( !defined( 'YOURLS_NOSTATS' ) || YOURLS_NOSTATS != true );
872 * Converts an IP to a 2 letter country code, using GeoIP database if available in includes/geo/
875 * @param string $ip IP or, if empty string, will be current user IP
876 * @param string $defaut Default string to return if IP doesn't resolve to a country (malformed, private IP...)
877 * @return string 2 letter country code (eg 'US') or $default
879 function yourls_geo_ip_to_countrycode( $ip = '', $default = '' ) {
880 // Allow plugins to short-circuit the Geo IP API
881 $location = yourls_apply_filter( 'shunt_geo_ip_to_countrycode', false, $ip, $default ); // at this point $ip can be '', check if your plugin hooks in here
882 if ( false !== $location )
886 $ip = yourls_get_IP();
888 // Use IPv4 or IPv6 DB & functions
889 if( false === filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 ) ) {
891 $func = 'geoip_country_code_by_addr';
894 $func = 'geoip_country_code_by_addr_v6';
897 if ( !file_exists( YOURLS_INC . '/geo/' . $db ) || !file_exists( YOURLS_INC .'/geo/geoip.inc' ) )
900 require_once( YOURLS_INC . '/geo/geoip.inc' );
901 $gi = geoip_open( YOURLS_INC . '/geo/' . $db, GEOIP_STANDARD );
903 $location = call_user_func( $func, $gi, $ip );
904 } catch ( Exception $e ) {
909 if( '' == $location )
910 $location = $default;
912 return yourls_apply_filter( 'geo_ip_to_countrycode', $location, $ip, $default );
916 * Converts a 2 letter country code to long name (ie AU -> Australia)
919 function yourls_geo_countrycode_to_countryname( $code ) {
920 // Allow plugins to short-circuit the Geo IP API
921 $country = yourls_apply_filter( 'shunt_geo_countrycode_to_countryname', false, $code );
922 if ( false !== $country )
925 // Load the Geo class if not already done
926 if( !class_exists( 'GeoIP', false ) ) {
927 $temp = yourls_geo_ip_to_countrycode( '127.0.0.1' );
930 if( class_exists( 'GeoIP', false ) ) {
932 $id = $geo->GEOIP_COUNTRY_CODE_TO_NUMBER[ $code ];
933 $long = $geo->GEOIP_COUNTRY_NAMES[ $id ];
941 * Return flag URL from 2 letter country code
944 function yourls_geo_get_flag( $code ) {
945 if( file_exists( YOURLS_INC.'/geo/flags/flag_'.strtolower($code).'.gif' ) ) {
946 $img = yourls_match_current_protocol( YOURLS_SITE.'/includes/geo/flags/flag_'.( strtolower( $code ) ).'.gif' );
950 return yourls_apply_filter( 'geo_get_flag', $img, $code );
955 * Check if an upgrade is needed
958 function yourls_upgrade_is_needed() {
959 // check YOURLS_DB_VERSION exist && match values stored in YOURLS_DB_TABLE_OPTIONS
960 list( $currentver, $currentsql ) = yourls_get_current_version_from_sql();
961 if( $currentsql < YOURLS_DB_VERSION )
968 * Get current version & db version as stored in the options DB. Prior to 1.4 there's no option table.
971 function yourls_get_current_version_from_sql() {
972 $currentver = yourls_get_option( 'version' );
973 $currentsql = yourls_get_option( 'db_version' );
975 // Values if version is 1.3
981 return array( $currentver, $currentsql);
985 * Read an option from DB (or from cache if available). Return value or $default if not found
987 * Pretty much stolen from WordPress
990 * @param string $option Option name. Expected to not be SQL-escaped.
991 * @param mixed $default Optional value to return if option doesn't exist. Default false.
992 * @return mixed Value set for the option.
994 function yourls_get_option( $option_name, $default = false ) {
997 // Allow plugins to short-circuit options
998 $pre = yourls_apply_filter( 'shunt_option_'.$option_name, false );
999 if ( false !== $pre )
1002 // If option not cached already, get its value from the DB
1003 if ( !isset( $ydb->option[$option_name] ) ) {
1004 $table = YOURLS_DB_TABLE_OPTIONS;
1005 $option_name = yourls_escape( $option_name );
1006 $row = $ydb->get_row( "SELECT `option_value` FROM `$table` WHERE `option_name` = '$option_name' LIMIT 1" );
1007 if ( is_object( $row) ) { // Has to be get_row instead of get_var because of funkiness with 0, false, null values
1008 $value = $row->option_value;
1009 } else { // option does not exist, so we must cache its non-existence
1012 $ydb->option[ $option_name ] = yourls_maybe_unserialize( $value );
1015 return yourls_apply_filter( 'get_option_'.$option_name, $ydb->option[$option_name] );
1019 * Read all options from DB at once
1021 * The goal is to read all option at once and then populate array $ydb->option, to prevent further
1022 * SQL queries if we need to read an option value later.
1023 * It's also a simple check whether YOURLS is installed or not (no option = assuming not installed)
1027 function yourls_get_all_options() {
1030 // Allow plugins to short-circuit all options. (Note: regular plugins are loaded after all options)
1031 $pre = yourls_apply_filter( 'shunt_all_options', false );
1032 if ( false !== $pre )
1035 $table = YOURLS_DB_TABLE_OPTIONS;
1037 $allopt = $ydb->get_results( "SELECT `option_name`, `option_value` FROM `$table` WHERE 1=1" );
1039 foreach( (array)$allopt as $option ) {
1040 $ydb->option[ $option->option_name ] = yourls_maybe_unserialize( $option->option_value );
1043 if( property_exists( $ydb, 'option' ) ) {
1044 $ydb->option = yourls_apply_filter( 'get_all_options', $ydb->option );
1045 $ydb->installed = true;
1047 // Zero option found: assume YOURLS is not installed
1048 $ydb->installed = false;
1053 * Update (add if doesn't exist) an option to DB
1055 * Pretty much stolen from WordPress
1058 * @param string $option Option name. Expected to not be SQL-escaped.
1059 * @param mixed $newvalue Option value. Must be serializable if non-scalar. Expected to not be SQL-escaped.
1060 * @return bool False if value was not updated, true otherwise.
1062 function yourls_update_option( $option_name, $newvalue ) {
1064 $table = YOURLS_DB_TABLE_OPTIONS;
1066 $option_name = trim( $option_name );
1067 if ( empty( $option_name ) )
1070 // Use clone to break object refs -- see commit 09b989d375bac65e692277f61a84fede2fb04ae3
1071 if ( is_object( $newvalue ) )
1072 $newvalue = clone $newvalue;
1074 $option_name = yourls_escape( $option_name );
1076 $oldvalue = yourls_get_option( $option_name );
1078 // If the new and old values are the same, no need to update.
1079 if ( $newvalue === $oldvalue )
1082 if ( false === $oldvalue ) {
1083 yourls_add_option( $option_name, $newvalue );
1087 $_newvalue = yourls_escape( yourls_maybe_serialize( $newvalue ) );
1089 yourls_do_action( 'update_option', $option_name, $oldvalue, $newvalue );
1091 $ydb->query( "UPDATE `$table` SET `option_value` = '$_newvalue' WHERE `option_name` = '$option_name'" );
1093 if ( $ydb->rows_affected == 1 ) {
1094 $ydb->option[ $option_name ] = $newvalue;
1101 * Add an option to the DB
1103 * Pretty much stolen from WordPress
1106 * @param string $option Name of option to add. Expected to not be SQL-escaped.
1107 * @param mixed $value Optional option value. Must be serializable if non-scalar. Expected to not be SQL-escaped.
1108 * @return bool False if option was not added and true otherwise.
1110 function yourls_add_option( $name, $value = '' ) {
1112 $table = YOURLS_DB_TABLE_OPTIONS;
1114 $name = trim( $name );
1115 if ( empty( $name ) )
1118 // Use clone to break object refs -- see commit 09b989d375bac65e692277f61a84fede2fb04ae3
1119 if ( is_object( $value ) )
1120 $value = clone $value;
1122 $name = yourls_escape( $name );
1124 // Make sure the option doesn't already exist
1125 if ( false !== yourls_get_option( $name ) )
1128 $_value = yourls_escape( yourls_maybe_serialize( $value ) );
1130 yourls_do_action( 'add_option', $name, $_value );
1132 $ydb->query( "INSERT INTO `$table` (`option_name`, `option_value`) VALUES ('$name', '$_value')" );
1133 $ydb->option[ $name ] = $value;
1139 * Delete an option from the DB
1141 * Pretty much stolen from WordPress
1144 * @param string $option Option name to delete. Expected to not be SQL-escaped.
1145 * @return bool True, if option is successfully deleted. False on failure.
1147 function yourls_delete_option( $name ) {
1149 $table = YOURLS_DB_TABLE_OPTIONS;
1150 $name = yourls_escape( $name );
1152 // Get the ID, if no ID then return
1153 $option = $ydb->get_row( "SELECT option_id FROM `$table` WHERE `option_name` = '$name'" );
1154 if ( is_null( $option ) || !$option->option_id )
1157 yourls_do_action( 'delete_option', $name );
1159 $ydb->query( "DELETE FROM `$table` WHERE `option_name` = '$name'" );
1160 unset( $ydb->option[ $name ] );
1166 * Serialize data if needed. Stolen from WordPress
1169 * @param mixed $data Data that might be serialized.
1170 * @return mixed A scalar data
1172 function yourls_maybe_serialize( $data ) {
1173 if ( is_array( $data ) || is_object( $data ) )
1174 return serialize( $data );
1176 if ( yourls_is_serialized( $data, false ) )
1177 return serialize( $data );
1183 * Check value to find if it was serialized. Stolen from WordPress
1186 * @param mixed $data Value to check to see if was serialized.
1187 * @param bool $strict Optional. Whether to be strict about the end of the string. Defaults true.
1188 * @return bool False if not serialized and true if it was.
1190 function yourls_is_serialized( $data, $strict = true ) {
1191 // if it isn't a string, it isn't serialized
1192 if ( ! is_string( $data ) )
1194 $data = trim( $data );
1195 if ( 'N;' == $data )
1197 $length = strlen( $data );
1200 if ( ':' !== $data[1] )
1203 $lastc = $data[ $length - 1 ];
1204 if ( ';' !== $lastc && '}' !== $lastc )
1207 $semicolon = strpos( $data, ';' );
1208 $brace = strpos( $data, '}' );
1209 // Either ; or } must exist.
1210 if ( false === $semicolon && false === $brace )
1212 // But neither must be in the first X characters.
1213 if ( false !== $semicolon && $semicolon < 3 )
1215 if ( false !== $brace && $brace < 4 )
1222 if ( '"' !== $data[ $length - 2 ] )
1224 } elseif ( false === strpos( $data, '"' ) ) {
1227 // or else fall through
1230 return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
1234 $end = $strict ? '$' : '';
1235 return (bool) preg_match( "/^{$token}:[0-9.E-]+;$end/", $data );
1241 * Unserialize value only if it was serialized. Stolen from WP
1244 * @param string $original Maybe unserialized original, if is needed.
1245 * @return mixed Unserialized data can be any type.
1247 function yourls_maybe_unserialize( $original ) {
1248 if ( yourls_is_serialized( $original ) ) // don't attempt to unserialize data that wasn't serialized going in
1249 return @unserialize( $original );
1254 * Determine if the current page is private
1257 function yourls_is_private() {
1260 if ( defined('YOURLS_PRIVATE') && YOURLS_PRIVATE == true ) {
1262 // Allow overruling for particular pages:
1265 if( yourls_is_API() ) {
1266 if( !defined('YOURLS_PRIVATE_API') || YOURLS_PRIVATE_API != false )
1270 } elseif( yourls_is_infos() ) {
1271 if( !defined('YOURLS_PRIVATE_INFOS') || YOURLS_PRIVATE_INFOS !== false )
1281 return yourls_apply_filter( 'is_private', $private );
1285 * Show login form if required
1288 function yourls_maybe_require_auth() {
1289 if( yourls_is_private() ) {
1290 yourls_do_action( 'require_auth' );
1291 require_once( YOURLS_INC.'/auth.php' );
1293 yourls_do_action( 'require_no_auth' );
1298 * Allow several short URLs for the same long URL ?
1301 function yourls_allow_duplicate_longurls() {
1302 // special treatment if API to check for WordPress plugin requests
1303 if( yourls_is_API() ) {
1304 if ( isset($_REQUEST['source']) && $_REQUEST['source'] == 'plugin' )
1307 return ( defined( 'YOURLS_UNIQUE_URLS' ) && YOURLS_UNIQUE_URLS == false );
1311 * Return array of keywords that redirect to the submitted long URL
1314 * @param string $longurl long url
1315 * @param string $sort Optional ORDER BY order (can be 'keyword', 'title', 'timestamp' or'clicks')
1316 * @param string $order Optional SORT order (can be 'ASC' or 'DESC')
1317 * @return array array of keywords
1319 function yourls_get_longurl_keywords( $longurl, $sort = 'none', $order = 'ASC' ) {
1321 $longurl = yourls_escape( yourls_sanitize_url( $longurl ) );
1322 $table = YOURLS_DB_TABLE_URL;
1323 $query = "SELECT `keyword` FROM `$table` WHERE `url` = '$longurl'";
1325 // Ensure sort is a column in database (@TODO: update verification array if database changes)
1326 if ( in_array( $sort, array('keyword','title','timestamp','clicks') ) ) {
1327 $query .= " ORDER BY '".$sort."'";
1328 if ( in_array( $order, array( 'ASC','DESC' ) ) ) {
1329 $query .= " ".$order;
1332 return yourls_apply_filter( 'get_longurl_keywords', $ydb->get_col( $query ), $longurl );
1336 * Check if an IP shortens URL too fast to prevent DB flood. Return true, or die.
1339 function yourls_check_IP_flood( $ip = '' ) {
1341 // Allow plugins to short-circuit the whole function
1342 $pre = yourls_apply_filter( 'shunt_check_IP_flood', false, $ip );
1343 if ( false !== $pre )
1346 yourls_do_action( 'pre_check_ip_flood', $ip ); // at this point $ip can be '', check it if your plugin hooks in here
1348 // Raise white flag if installing or if no flood delay defined
1350 ( defined('YOURLS_FLOOD_DELAY_SECONDS') && YOURLS_FLOOD_DELAY_SECONDS === 0 ) ||
1351 !defined('YOURLS_FLOOD_DELAY_SECONDS') ||
1352 yourls_is_installing()
1356 // Don't throttle logged in users
1357 if( yourls_is_private() ) {
1358 if( yourls_is_valid_user() === true )
1362 // Don't throttle whitelist IPs
1363 if( defined( 'YOURLS_FLOOD_IP_WHITELIST' ) && YOURLS_FLOOD_IP_WHITELIST ) {
1364 $whitelist_ips = explode( ',', YOURLS_FLOOD_IP_WHITELIST );
1365 foreach( (array)$whitelist_ips as $whitelist_ip ) {
1366 $whitelist_ip = trim( $whitelist_ip );
1367 if ( $whitelist_ip == $ip )
1372 $ip = ( $ip ? yourls_sanitize_ip( $ip ) : yourls_get_IP() );
1373 $ip = yourls_escape( $ip );
1375 yourls_do_action( 'check_ip_flood', $ip );
1378 $table = YOURLS_DB_TABLE_URL;
1380 $lasttime = $ydb->get_var( "SELECT `timestamp` FROM $table WHERE `ip` = '$ip' ORDER BY `timestamp` DESC LIMIT 1" );
1383 $then = date( 'U', strtotime( $lasttime ) );
1384 if( ( $now - $then ) <= YOURLS_FLOOD_DELAY_SECONDS ) {
1386 yourls_do_action( 'ip_flood', $ip, $now - $then );
1387 yourls_die( yourls__( 'Too many URLs added too fast. Slow down please.' ), yourls__( 'Forbidden' ), 403 );
1395 * Check if YOURLS is installing
1400 function yourls_is_installing() {
1401 $installing = defined( 'YOURLS_INSTALLING' ) && YOURLS_INSTALLING == true;
1402 return yourls_apply_filter( 'is_installing', $installing );
1406 * Check if YOURLS is upgrading
1411 function yourls_is_upgrading() {
1412 $upgrading = defined( 'YOURLS_UPGRADING' ) && YOURLS_UPGRADING == true;
1413 return yourls_apply_filter( 'is_upgrading', $upgrading );
1418 * Check if YOURLS is installed
1420 * Checks property $ydb->installed that is created by yourls_get_all_options()
1422 * See inline comment for updating from 1.3 or prior.
1425 function yourls_is_installed() {
1427 $is_installed = ( property_exists( $ydb, 'installed' ) && $ydb->installed == true );
1428 return yourls_apply_filter( 'is_installed', $is_installed );
1430 /* Note: this test won't work on YOURLS 1.3 or older (Aug 2009...)
1431 Should someone complain that they cannot upgrade directly from
1432 1.3 to 1.7: first, laugh at them, then ask them to install 1.6 first.
1437 * Generate random string of (int)$length length and type $type (see function for details)
1440 function yourls_rnd_string ( $length = 5, $type = 0, $charlist = '' ) {
1442 $length = intval( $length );
1444 // define possible characters
1447 // custom char list, or comply to charset as defined in config
1449 $possible = $charlist ? $charlist : yourls_get_shorturl_charset() ;
1452 // no vowels to make no offending word, no 0/1/o/l to avoid confusion between letters & digits. Perfect for passwords.
1454 $possible = "23456789bcdfghjkmnpqrstvwxyz";
1457 // Same, with lower + upper
1459 $possible = "23456789bcdfghjkmnpqrstvwxyzBCDFGHJKMNPQRSTVWXYZ";
1462 // all letters, lowercase
1464 $possible = "abcdefghijklmnopqrstuvwxyz";
1467 // all letters, lowercase + uppercase
1469 $possible = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
1472 // all digits & letters lowercase
1474 $possible = "0123456789abcdefghijklmnopqrstuvwxyz";
1477 // all digits & letters lowercase + uppercase
1479 $possible = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
1485 while ($i < $length) {
1486 $str .= substr( $possible, mt_rand( 0, strlen( $possible )-1 ), 1 );
1490 return yourls_apply_filter( 'rnd_string', $str, $length, $type, $charlist );
1494 * Return salted string
1497 function yourls_salt( $string ) {
1498 $salt = defined('YOURLS_COOKIEKEY') ? YOURLS_COOKIEKEY : md5(__FILE__) ;
1499 return yourls_apply_filter( 'yourls_salt', md5 ($string . $salt), $string );
1503 * Add a query var to a URL and return URL. Completely stolen from WP.
1505 * Works with one of these parameter patterns:
1506 * array( 'var' => 'value' )
1507 * array( 'var' => 'value' ), $url
1509 * 'var', 'value', $url
1510 * If $url omitted, uses $_SERVER['REQUEST_URI']
1513 function yourls_add_query_arg() {
1515 if ( is_array( func_get_arg(0) ) ) {
1516 if ( @func_num_args() < 2 || false === @func_get_arg( 1 ) )
1517 $uri = $_SERVER['REQUEST_URI'];
1519 $uri = @func_get_arg( 1 );
1521 if ( @func_num_args() < 3 || false === @func_get_arg( 2 ) )
1522 $uri = $_SERVER['REQUEST_URI'];
1524 $uri = @func_get_arg( 2 );
1527 $uri = str_replace( '&', '&', $uri );
1530 if ( $frag = strstr( $uri, '#' ) )
1531 $uri = substr( $uri, 0, -strlen( $frag ) );
1535 if ( preg_match( '|^https?://|i', $uri, $matches ) ) {
1536 $protocol = $matches[0];
1537 $uri = substr( $uri, strlen( $protocol ) );
1542 if ( strpos( $uri, '?' ) !== false ) {
1543 $parts = explode( '?', $uri, 2 );
1544 if ( 1 == count( $parts ) ) {
1548 $base = $parts[0] . '?';
1551 } elseif ( !empty( $protocol ) || strpos( $uri, '=' ) === false ) {
1559 parse_str( $query, $qs );
1560 $qs = yourls_urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
1561 if ( is_array( func_get_arg( 0 ) ) ) {
1562 $kayvees = func_get_arg( 0 );
1563 $qs = array_merge( $qs, $kayvees );
1565 $qs[func_get_arg( 0 )] = func_get_arg( 1 );
1568 foreach ( (array) $qs as $k => $v ) {
1573 $ret = http_build_query( $qs );
1574 $ret = trim( $ret, '?' );
1575 $ret = preg_replace( '#=(&|$)#', '$1', $ret );
1576 $ret = $protocol . $base . $ret . $frag;
1577 $ret = rtrim( $ret, '?' );
1582 * Navigates through an array and encodes the values to be used in a URL. Stolen from WP, used in yourls_add_query_arg()
1585 function yourls_urlencode_deep( $value ) {
1586 $value = is_array( $value ) ? array_map( 'yourls_urlencode_deep', $value ) : urlencode( $value );
1591 * Remove arg from query. Opposite of yourls_add_query_arg. Stolen from WP.
1594 function yourls_remove_query_arg( $key, $query = false ) {
1595 if ( is_array( $key ) ) { // removing multiple keys
1596 foreach ( $key as $k )
1597 $query = yourls_add_query_arg( $k, false, $query );
1600 return yourls_add_query_arg( $key, false, $query );
1604 * Return a time-dependent string for nonce creation
1607 function yourls_tick() {
1608 return ceil( time() / YOURLS_NONCE_LIFE );
1612 * Create a time limited, action limited and user limited token
1615 function yourls_create_nonce( $action, $user = false ) {
1616 if( false == $user )
1617 $user = defined( 'YOURLS_USER' ) ? YOURLS_USER : '-1';
1618 $tick = yourls_tick();
1619 return substr( yourls_salt($tick . $action . $user), 0, 10 );
1623 * Create a nonce field for inclusion into a form
1626 function yourls_nonce_field( $action, $name = 'nonce', $user = false, $echo = true ) {
1627 $field = '<input type="hidden" id="'.$name.'" name="'.$name.'" value="'.yourls_create_nonce( $action, $user ).'" />';
1634 * Add a nonce to a URL. If URL omitted, adds nonce to current URL
1637 function yourls_nonce_url( $action, $url = false, $name = 'nonce', $user = false ) {
1638 $nonce = yourls_create_nonce( $action, $user );
1639 return yourls_add_query_arg( $name, $nonce, $url );
1643 * Check validity of a nonce (ie time span, user and action match).
1645 * Returns true if valid, dies otherwise (yourls_die() or die($return) if defined)
1646 * if $nonce is false or unspecified, it will use $_REQUEST['nonce']
1649 function yourls_verify_nonce( $action, $nonce = false, $user = false, $return = '' ) {
1651 if( false == $user )
1652 $user = defined( 'YOURLS_USER' ) ? YOURLS_USER : '-1';
1654 // get current nonce value
1655 if( false == $nonce && isset( $_REQUEST['nonce'] ) )
1656 $nonce = $_REQUEST['nonce'];
1658 // what nonce should be
1659 $valid = yourls_create_nonce( $action, $user );
1661 if( $nonce == $valid ) {
1666 yourls_die( yourls__( 'Unauthorized action or expired link' ), yourls__( 'Error' ), 403 );
1671 * Converts keyword into short link (prepend with YOURLS base URL)
1674 function yourls_link( $keyword = '' ) {
1675 $link = YOURLS_SITE . '/' . yourls_sanitize_keyword( $keyword );
1676 return yourls_apply_filter( 'yourls_link', $link, $keyword );
1680 * Converts keyword into stat link (prepend with YOURLS base URL, append +)
1683 function yourls_statlink( $keyword = '' ) {
1684 $link = YOURLS_SITE . '/' . yourls_sanitize_keyword( $keyword ) . '+';
1685 if( yourls_is_ssl() )
1686 $link = yourls_set_url_scheme( $link, 'https' );
1687 return yourls_apply_filter( 'yourls_statlink', $link, $keyword );
1691 * Check if we'll need interface display function (ie not API or redirection)
1694 function yourls_has_interface() {
1695 if( yourls_is_API() or yourls_is_GO() )
1701 * Check if we're in API mode. Returns bool
1704 function yourls_is_API() {
1705 if ( defined( 'YOURLS_API' ) && YOURLS_API == true )
1711 * Check if we're in Ajax mode. Returns bool
1714 function yourls_is_Ajax() {
1715 if ( defined( 'YOURLS_AJAX' ) && YOURLS_AJAX == true )
1721 * Check if we're in GO mode (yourls-go.php). Returns bool
1724 function yourls_is_GO() {
1725 if ( defined( 'YOURLS_GO' ) && YOURLS_GO == true )
1731 * Check if we're displaying stats infos (yourls-infos.php). Returns bool
1734 function yourls_is_infos() {
1735 if ( defined( 'YOURLS_INFOS' ) && YOURLS_INFOS == true )
1741 * Check if we're in the admin area. Returns bool
1744 function yourls_is_admin() {
1745 if ( defined( 'YOURLS_ADMIN' ) && YOURLS_ADMIN == true )
1751 * Check if the server seems to be running on Windows. Not exactly sure how reliable this is.
1754 function yourls_is_windows() {
1755 return defined( 'DIRECTORY_SEPARATOR' ) && DIRECTORY_SEPARATOR == '\\';
1759 * Check if SSL is required. Returns bool.
1762 function yourls_needs_ssl() {
1763 if ( defined('YOURLS_ADMIN_SSL') && YOURLS_ADMIN_SSL == true )
1769 * Return admin link, with SSL preference if applicable.
1772 function yourls_admin_url( $page = '' ) {
1773 $admin = YOURLS_SITE . '/admin/' . $page;
1774 if( yourls_is_ssl() or yourls_needs_ssl() )
1775 $admin = yourls_set_url_scheme( $admin, 'https' );
1776 return yourls_apply_filter( 'admin_url', $admin, $page );
1780 * Return YOURLS_SITE or URL under YOURLS setup, with SSL preference
1783 function yourls_site_url( $echo = true, $url = '' ) {
1784 $url = yourls_get_relative_url( $url );
1785 $url = trim( YOURLS_SITE . '/' . $url, '/' );
1787 // Do not enforce (checking yourls_need_ssl() ) but check current usage so it won't force SSL on non-admin pages
1788 if( yourls_is_ssl() )
1789 $url = yourls_set_url_scheme( $url, 'https' );
1790 $url = yourls_apply_filter( 'site_url', $url );
1797 * Check if SSL is used, returns bool. Stolen from WP.
1800 function yourls_is_ssl() {
1802 if ( isset( $_SERVER['HTTPS'] ) ) {
1803 if ( 'on' == strtolower( $_SERVER['HTTPS'] ) )
1805 if ( '1' == $_SERVER['HTTPS'] )
1807 } elseif ( isset( $_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
1810 return yourls_apply_filter( 'is_ssl', $is_ssl );
1814 * Get a remote page title
1816 * This function returns a string: either the page title as defined in HTML, or the URL if not found
1817 * The function tries to convert funky characters found in titles to UTF8, from the detected charset.
1818 * Charset in use is guessed from HTML meta tag, or if not found, from server's 'content-type' response.
1820 * @param string $url URL
1821 * @return string Title (sanitized) or the URL if no title found
1823 function yourls_get_remote_title( $url ) {
1824 // Allow plugins to short-circuit the whole function
1825 $pre = yourls_apply_filter( 'shunt_get_remote_title', false, $url );
1826 if ( false !== $pre )
1829 $url = yourls_sanitize_url( $url );
1831 // Only deal with http(s)://
1832 if( !in_array( yourls_get_protocol( $url ), array( 'http://', 'https://' ) ) )
1835 $title = $charset = false;
1837 $response = yourls_http_get( $url ); // can be a Request object or an error string
1838 if( is_string( $response ) ) {
1842 // Page content. No content? Return the URL
1843 $content = $response->body;
1847 // look for <title>. No title found? Return the URL
1848 if ( preg_match('/<title>(.*?)<\/title>/is', $content, $found ) ) {
1855 // Now we have a title. We'll try to get proper utf8 from it.
1857 // Get charset as (and if) defined by the HTML meta tag. We should match
1858 // <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
1859 // or <meta charset='utf-8'> and all possible variations: see https://gist.github.com/ozh/7951236
1860 if ( preg_match( '/<meta[^>]*charset\s*=["\' ]*([a-zA-Z0-9\-_]+)/is', $content, $found ) ) {
1861 $charset = $found[1];
1864 // No charset found in HTML. Get charset as (and if) defined by the server response
1865 $_charset = current( $response->headers->getValues( 'content-type' ) );
1866 if( preg_match( '/charset=(\S+)/', $_charset, $found ) ) {
1867 $charset = trim( $found[1], ';' );
1872 // Conversion to utf-8 if what we have is not utf8 already
1873 if( strtolower( $charset ) != 'utf-8' && function_exists( 'mb_convert_encoding' ) ) {
1874 // We use @ to remove warnings because mb_ functions are easily bitching about illegal chars
1876 $title = @mb_convert_encoding( $title, 'UTF-8', $charset );
1878 $title = @mb_convert_encoding( $title, 'UTF-8' );
1882 // Remove HTML entities
1883 $title = html_entity_decode( $title, ENT_QUOTES, 'UTF-8' );
1885 // Strip out evil things
1886 $title = yourls_sanitize_title( $title );
1888 return yourls_apply_filter( 'get_remote_title', $title, $url );
1892 * Quick UA check for mobile devices. Return boolean.
1895 function yourls_is_mobile_device() {
1898 'android', 'blackberry', 'blazer',
1899 'compal', 'elaine', 'fennec', 'hiptop',
1900 'iemobile', 'iphone', 'ipod', 'ipad',
1901 'iris', 'kindle', 'opera mobi', 'opera mini',
1902 'palm', 'phone', 'pocket', 'psp', 'symbian',
1903 'treo', 'wap', 'windows ce', 'windows phone'
1906 // Current user-agent
1907 $current = strtolower( $_SERVER['HTTP_USER_AGENT'] );
1910 $is_mobile = ( str_replace( $mobiles, '', $current ) != $current );
1911 return yourls_apply_filter( 'is_mobile_device', $is_mobile );
1915 * Get request in YOURLS base (eg in 'http://site.com/yourls/abcd' get 'abdc')
1918 function yourls_get_request() {
1919 // Allow plugins to short-circuit the whole function
1920 $pre = yourls_apply_filter( 'shunt_get_request', false );
1921 if ( false !== $pre )
1924 static $request = null;
1926 yourls_do_action( 'pre_get_request', $request );
1928 if( $request !== null )
1931 // Ignore protocol & www. prefix
1932 $root = str_replace( array( 'https://', 'http://', 'https://www.', 'http://www.' ), '', YOURLS_SITE );
1933 // Case insensitive comparison of the YOURLS root to match both http://Sho.rt/blah and http://sho.rt/blah
1934 $request = preg_replace( "!$root/!i", '', $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'], 1 );
1936 // Unless request looks like a full URL (ie request is a simple keyword) strip query string
1937 if( !preg_match( "@^[a-zA-Z]+://.+@", $request ) ) {
1938 $request = current( explode( '?', $request ) );
1941 return yourls_apply_filter( 'get_request', $request );
1945 * Change protocol to match current scheme used (http or https)
1948 function yourls_match_current_protocol( $url, $normal = 'http://', $ssl = 'https://' ) {
1949 if( yourls_is_ssl() )
1950 $url = str_replace( $normal, $ssl, $url );
1951 return yourls_apply_filter( 'match_current_protocol', $url );
1955 * Fix $_SERVER['REQUEST_URI'] variable for various setups. Stolen from WP.
1958 function yourls_fix_request_uri() {
1960 $default_server_values = array(
1961 'SERVER_SOFTWARE' => '',
1962 'REQUEST_URI' => '',
1964 $_SERVER = array_merge( $default_server_values, $_SERVER );
1966 // Fix for IIS when running with PHP ISAPI
1967 if ( empty( $_SERVER['REQUEST_URI'] ) || ( php_sapi_name() != 'cgi-fcgi' && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) ) ) {
1970 if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
1971 $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL'];
1973 // IIS Isapi_Rewrite
1974 else if ( isset( $_SERVER['HTTP_X_REWRITE_URL'] ) ) {
1975 $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];
1977 // Use ORIG_PATH_INFO if there is no PATH_INFO
1978 if ( !isset( $_SERVER['PATH_INFO'] ) && isset( $_SERVER['ORIG_PATH_INFO'] ) )
1979 $_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];
1981 // Some IIS + PHP configurations puts the script-name in the path-info (No need to append it twice)
1982 if ( isset( $_SERVER['PATH_INFO'] ) ) {
1983 if ( $_SERVER['PATH_INFO'] == $_SERVER['SCRIPT_NAME'] )
1984 $_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO'];
1986 $_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];
1989 // Append the query string if it exists and isn't null
1990 if ( ! empty( $_SERVER['QUERY_STRING'] ) ) {
1991 $_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING'];
1998 * Shutdown function, runs just before PHP shuts down execution. Stolen from WP
2001 function yourls_shutdown() {
2002 yourls_do_action( 'shutdown' );
2006 * Auto detect custom favicon in /user directory, fallback to YOURLS favicon, and echo/return its URL
2009 function yourls_favicon( $echo = true ) {
2010 static $favicon = null;
2011 if( $favicon !== null )
2015 // search for favicon.(gif|ico|png|jpg|svg)
2016 foreach( array( 'gif', 'ico', 'png', 'jpg', 'svg' ) as $ext ) {
2017 if( file_exists( YOURLS_USERDIR. '/favicon.' . $ext ) ) {
2018 $custom = 'favicon.' . $ext;
2024 $favicon = yourls_site_url( false, YOURLS_USERURL . '/' . $custom );
2026 $favicon = yourls_site_url( false ) . '/images/favicon.gif';
2034 * Check for maintenance mode. If yes, die. See yourls_maintenance_mode(). Stolen from WP.
2037 function yourls_check_maintenance_mode() {
2039 $file = YOURLS_ABSPATH . '/.maintenance' ;
2040 if ( !file_exists( $file ) || yourls_is_upgrading() || yourls_is_installing() )
2043 global $maintenance_start;
2045 include_once( $file );
2046 // If the $maintenance_start timestamp is older than 10 minutes, don't die.
2047 if ( ( time() - $maintenance_start ) >= 600 )
2050 // Use any /user/maintenance.php file
2051 if( file_exists( YOURLS_USERDIR.'/maintenance.php' ) ) {
2052 include_once( YOURLS_USERDIR.'/maintenance.php' );
2056 // https://www.youtube.com/watch?v=Xw-m4jEY-Ns
2057 $title = yourls__( 'Service temporarily unavailable' );
2058 $message = yourls__( 'Our service is currently undergoing scheduled maintenance.' ) . "</p>\n<p>" .
2059 yourls__( 'Things should not last very long, thank you for your patience and please excuse the inconvenience' );
2060 yourls_die( $message, $title , 503 );
2065 * Return current admin page, or null if not an admin page
2067 * @return mixed string if admin page, null if not an admin page
2070 function yourls_current_admin_page() {
2071 if( yourls_is_admin() ) {
2072 $current = substr( yourls_get_request(), 6 );
2073 if( $current === false )
2074 $current = 'index.php'; // if current page is http://sho.rt/admin/ instead of http://sho.rt/admin/index.php
2082 * Check if a URL protocol is allowed
2084 * Checks a URL against a list of whitelisted protocols. Protocols must be defined with
2085 * their complete scheme name, ie 'stuff:' or 'stuff://' (for instance, 'mailto:' is a valid
2086 * protocol, 'mailto://' isn't, and 'http:' with no double slashed isn't either
2090 * @param string $url URL to be check
2091 * @param array $protocols Optional. Array of protocols, defaults to global $yourls_allowedprotocols
2092 * @return boolean true if protocol allowed, false otherwise
2094 function yourls_is_allowed_protocol( $url, $protocols = array() ) {
2095 if( ! $protocols ) {
2096 global $yourls_allowedprotocols;
2097 $protocols = $yourls_allowedprotocols;
2100 $protocol = yourls_get_protocol( $url );
2101 return yourls_apply_filter( 'is_allowed_protocol', in_array( $protocol, $protocols ), $url, $protocols );
2105 * Get protocol from a URL (eg mailto:, http:// ...)
2109 * @param string $url URL to be check
2110 * @return string Protocol, with slash slash if applicable. Empty string if no protocol
2112 function yourls_get_protocol( $url ) {
2113 preg_match( '!^[a-zA-Z0-9\+\.-]+:(//)?!', $url, $matches );
2115 http://en.wikipedia.org/wiki/URI_scheme#Generic_syntax
2116 The scheme name consists of a sequence of characters beginning with a letter and followed by any
2117 combination of letters, digits, plus ("+"), period ("."), or hyphen ("-"). Although schemes are
2118 case-insensitive, the canonical form is lowercase and documents that specify schemes must do so
2119 with lowercase letters. It is followed by a colon (":").
2121 $protocol = ( isset( $matches[0] ) ? $matches[0] : '' );
2122 return yourls_apply_filter( 'get_protocol', $protocol, $url );
2126 * Get relative URL (eg 'abc' from 'http://sho.rt/abc')
2128 * Treat indifferently http & https. If a URL isn't relative to the YOURLS install, return it as is
2129 * or return empty string if $strict is true
2132 * @param string $url URL to relativize
2133 * @param bool $strict if true and if URL isn't relative to YOURLS install, return empty string
2134 * @return string URL
2136 function yourls_get_relative_url( $url, $strict = true ) {
2137 $url = yourls_sanitize_url( $url );
2139 // Remove protocols to make it easier
2140 $noproto_url = str_replace( 'https:', 'http:', $url );
2141 $noproto_site = str_replace( 'https:', 'http:', YOURLS_SITE );
2143 // Trim URL from YOURLS root URL : if no modification made, URL wasn't relative
2144 $_url = str_replace( $noproto_site . '/', '', $noproto_url );
2145 if( $_url == $noproto_url )
2146 $_url = ( $strict ? '' : $url );
2148 return yourls_apply_filter( 'get_relative_url', $_url, $url );
2152 * Marks a function as deprecated and informs when it has been used. Stolen from WP.
2154 * There is a hook deprecated_function that will be called that can be used
2155 * to get the backtrace up to what file and function called the deprecated
2158 * The current behavior is to trigger a user error if YOURLS_DEBUG is true.
2160 * This function is to be used in every function that is deprecated.
2163 * @uses yourls_do_action() Calls 'deprecated_function' and passes the function name, what to use instead,
2164 * and the version the function was deprecated in.
2165 * @uses yourls_apply_filters() Calls 'deprecated_function_trigger_error' and expects boolean value of true to do
2166 * trigger or false to not trigger error.
2168 * @param string $function The function that was called
2169 * @param string $version The version of WordPress that deprecated the function
2170 * @param string $replacement Optional. The function that should have been called
2172 function yourls_deprecated_function( $function, $version, $replacement = null ) {
2174 yourls_do_action( 'deprecated_function', $function, $replacement, $version );
2176 // Allow plugin to filter the output error trigger
2177 if ( YOURLS_DEBUG && yourls_apply_filters( 'deprecated_function_trigger_error', true ) ) {
2178 if ( ! is_null( $replacement ) )
2179 trigger_error( sprintf( yourls__('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
2181 trigger_error( sprintf( yourls__('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
2186 * Return the value if not an empty string
2188 * Used with array_filter(), to remove empty keys but not keys with value 0 or false
2191 * @param mixed $val Value to test against ''
2192 * @return bool True if not an empty string
2194 function yourls_return_if_not_empty_string( $val ) {
2195 return( $val !== '' );
2199 * Add a message to the debug log
2201 * When in debug mode ( YOURLS_DEBUG == true ) the debug log is echoed in yourls_html_footer()
2202 * Log messages are appended to $ydb->debug_log array, which is instanciated within class ezSQLcore_YOURLS
2205 * @param string $msg Message to add to the debug log
2206 * @return string The message itself
2208 function yourls_debug_log( $msg ) {
2210 $ydb->debug_log[] = $msg;
2215 * Explode a URL in an array of ( 'protocol' , 'slashes if any', 'rest of the URL' )
2217 * Some hosts trip up when a query string contains 'http://' - see http://git.io/j1FlJg
2218 * The idea is that instead of passing the whole URL to a bookmarklet, eg index.php?u=http://blah.com,
2219 * we pass it by pieces to fool the server, eg index.php?proto=http:&slashes=//&rest=blah.com
2221 * Known limitation: this won't work if the rest of the URL itself contains 'http://', for example
2222 * if rest = blah.com/file.php?url=http://foo.com
2226 * with 'mailto:jsmith@example.com?subject=hey' :
2227 * array( 'protocol' => 'mailto:', 'slashes' => '', 'rest' => 'jsmith@example.com?subject=hey' )
2229 * with 'http://example.com/blah.html' :
2230 * array( 'protocol' => 'http:', 'slashes' => '//', 'rest' => 'example.com/blah.html' )
2233 * @param string $url URL to be parsed
2234 * @param array $array Optional, array of key names to be used in returned array
2235 * @return mixed false if no protocol found, array of ('protocol' , 'slashes', 'rest') otherwise
2237 function yourls_get_protocol_slashes_and_rest( $url, $array = array( 'protocol', 'slashes', 'rest' ) ) {
2238 $proto = yourls_get_protocol( $url );
2240 if( !$proto or count( $array ) != 3 )
2243 list( $null, $rest ) = explode( $proto, $url, 2 );
2245 list( $proto, $slashes ) = explode( ':', $proto );
2247 return array( $array[0] => $proto . ':', $array[1] => $slashes, $array[2] => $rest );
2251 * Set URL scheme (to HTTP or HTTPS)
2254 * @param string $url URL
2255 * @param string $scheme scheme, either 'http' or 'https'
2256 * @return string URL with chosen scheme
2258 function yourls_set_url_scheme( $url, $scheme = false ) {
2259 if( $scheme != 'http' && $scheme != 'https' ) {
2262 return preg_replace( '!^[a-zA-Z0-9\+\.-]+://!', $scheme . '://', $url );