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') ) {
17 $charset = '0123456789abcdefghijklmnopqrstuvwxyz';
19 switch( YOURLS_URL_CONVERT ) {
21 $charset = '0123456789abcdefghijklmnopqrstuvwxyz';
24 case 64: // just because some people get this wrong in their config.php
25 $charset = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
30 $charset = yourls_apply_filter( 'get_shorturl_charset', $charset );
35 * Make an optimized regexp pattern from a string of characters
38 function yourls_make_regexp_pattern( $string ) {
39 $pattern = preg_quote( $string, '-' ); // add - as an escaped characters -- this is fixed in PHP 5.3
40 // TODO: replace char sequences by smart sequences such as 0-9, a-z, A-Z ... ?
45 * Is a URL a short URL?
48 function yourls_is_shorturl( $shorturl ) {
49 // TODO: make sure this function evolves with the feature set.
52 $keyword = yourls_get_relative_url( $shorturl ); // accept either 'http://ozh.in/abc' or 'abc'
53 if( $keyword && $keyword == yourls_sanitize_string( $keyword ) && yourls_keyword_is_taken( $keyword ) ) {
57 return yourls_apply_filter( 'is_shorturl', $is_short, $shorturl );
61 * Check to see if a given keyword is reserved (ie reserved URL or an existing page). Returns bool
64 function yourls_keyword_is_reserved( $keyword ) {
65 global $yourls_reserved_URL;
66 $keyword = yourls_sanitize_keyword( $keyword );
69 if ( in_array( $keyword, $yourls_reserved_URL)
70 or file_exists( YOURLS_ABSPATH ."/pages/$keyword.php" )
71 or is_dir( YOURLS_ABSPATH ."/$keyword" )
75 return yourls_apply_filter( 'keyword_is_reserved', $reserved, $keyword );
79 * Function: Get client IP Address. Returns a DB safe string.
82 function yourls_get_IP() {
83 // Precedence: if set, X-Forwarded-For > HTTP_X_FORWARDED_FOR > HTTP_CLIENT_IP > HTTP_VIA > REMOTE_ADDR
84 $headers = array( 'X-Forwarded-For', 'HTTP_X_FORWARDED_FOR', 'HTTP_CLIENT_IP', 'HTTP_VIA', 'REMOTE_ADDR' );
85 foreach( $headers as $header ) {
86 if ( !empty( $_SERVER[ $header ] ) ) {
87 $ip = $_SERVER[ $header ];
92 // headers can contain multiple IPs (X-Forwarded-For = client, proxy1, proxy2). Take first one.
93 if ( strpos( $ip, ',' ) !== false )
94 $ip = substr( $ip, 0, strpos( $ip, ',' ) );
96 return yourls_apply_filter( 'get_IP', yourls_sanitize_ip( $ip ) );
100 * Get next id a new link will have if no custom keyword provided
103 function yourls_get_next_decimal() {
104 return yourls_apply_filter( 'get_next_decimal', (int)yourls_get_option( 'next_id' ) );
108 * Update id for next link with no custom keyword
111 function yourls_update_next_decimal( $int = '' ) {
112 $int = ( $int == '' ) ? yourls_get_next_decimal() + 1 : (int)$int ;
113 $update = yourls_update_option( 'next_id', $int );
114 yourls_do_action( 'update_next_decimal', $int, $update );
119 * Delete a link in the DB
122 function yourls_delete_link_by_keyword( $keyword ) {
125 $table = YOURLS_DB_TABLE_URL;
126 $keyword = yourls_sanitize_string( $keyword );
127 $delete = $ydb->query("DELETE FROM `$table` WHERE `keyword` = '$keyword';");
128 yourls_do_action( 'delete_link', $keyword, $delete );
133 * SQL query to insert a new link in the DB. Returns boolean for success or failure of the inserting
136 function yourls_insert_link_in_db( $url, $keyword, $title = '' ) {
139 $url = yourls_escape( yourls_sanitize_url( $url ) );
140 $keyword = yourls_escape( yourls_sanitize_keyword( $keyword ) );
141 $title = yourls_escape( yourls_sanitize_title( $title ) );
143 $table = YOURLS_DB_TABLE_URL;
144 $timestamp = date('Y-m-d H:i:s');
145 $ip = yourls_get_IP();
146 $insert = $ydb->query("INSERT INTO `$table` (`keyword`, `url`, `title`, `timestamp`, `ip`, `clicks`) VALUES('$keyword', '$url', '$title', '$timestamp', '$ip', 0);");
148 yourls_do_action( 'insert_link', (bool)$insert, $url, $keyword, $title, $timestamp, $ip );
150 return (bool)$insert;
154 * Check if a URL already exists in the DB. Return NULL (doesn't exist) or an object with URL informations.
157 function yourls_url_exists( $url ) {
158 // Allow plugins to short-circuit the whole function
159 $pre = yourls_apply_filter( 'shunt_url_exists', false, $url );
160 if ( false !== $pre )
164 $table = YOURLS_DB_TABLE_URL;
165 $strip_url = stripslashes($url);
166 $url_exists = $ydb->get_row("SELECT * FROM `$table` WHERE `url` = '".$strip_url."';");
168 return yourls_apply_filter( 'url_exists', $url_exists, $url );
172 * Add a new link in the DB, either with custom keyword, or find one
175 function yourls_add_new_link( $url, $keyword = '', $title = '' ) {
178 // Allow plugins to short-circuit the whole function
179 $pre = yourls_apply_filter( 'shunt_add_new_link', false, $url, $keyword, $title );
180 if ( false !== $pre )
183 $url = yourls_encodeURI( $url );
184 $url = yourls_escape( yourls_sanitize_url( $url ) );
185 if ( !$url || $url == 'http://' || $url == 'https://' ) {
186 $return['status'] = 'fail';
187 $return['code'] = 'error:nourl';
188 $return['message'] = yourls__( 'Missing or malformed URL' );
189 $return['errorCode'] = '400';
190 return yourls_apply_filter( 'add_new_link_fail_nourl', $return, $url, $keyword, $title );
194 $ip = yourls_get_IP();
195 yourls_check_IP_flood( $ip );
197 // Prevent internal redirection loops: cannot shorten a shortened URL
198 if( yourls_get_relative_url( $url ) ) {
199 if( yourls_is_shorturl( $url ) ) {
200 $return['status'] = 'fail';
201 $return['code'] = 'error:noloop';
202 $return['message'] = yourls__( 'URL is a short URL' );
203 $return['errorCode'] = '400';
204 return yourls_apply_filter( 'add_new_link_fail_noloop', $return, $url, $keyword, $title );
208 yourls_do_action( 'pre_add_new_link', $url, $keyword, $title );
210 $strip_url = stripslashes( $url );
213 // duplicates allowed or new URL => store it
214 if( yourls_allow_duplicate_longurls() || !( $url_exists = yourls_url_exists( $url ) ) ) {
216 if( isset( $title ) && !empty( $title ) ) {
217 $title = yourls_sanitize_title( $title );
219 $title = yourls_get_remote_title( $url );
221 $title = yourls_apply_filter( 'add_new_title', $title, $url, $keyword );
223 // Custom keyword provided
226 yourls_do_action( 'add_new_link_custom_keyword', $url, $keyword, $title );
228 $keyword = yourls_escape( yourls_sanitize_string( $keyword ) );
229 $keyword = yourls_apply_filter( 'custom_keyword', $keyword, $url, $title );
230 if ( !yourls_keyword_is_free( $keyword ) ) {
231 // This shorturl either reserved or taken already
232 $return['status'] = 'fail';
233 $return['code'] = 'error:keyword';
234 $return['message'] = yourls_s( 'Short URL %s already exists in database or is reserved', $keyword );
236 // all clear, store !
237 yourls_insert_link_in_db( $url, $keyword, $title );
238 $return['url'] = array('keyword' => $keyword, 'url' => $strip_url, 'title' => $title, 'date' => date('Y-m-d H:i:s'), 'ip' => $ip );
239 $return['status'] = 'success';
240 $return['message'] = /* //translators: eg "http://someurl/ added to DB" */ yourls_s( '%s added to database', yourls_trim_long_string( $strip_url ) );
241 $return['title'] = $title;
242 $return['html'] = yourls_table_add_row( $keyword, $url, $title, $ip, 0, time() );
243 $return['shorturl'] = YOURLS_SITE .'/'. $keyword;
246 // Create random keyword
249 yourls_do_action( 'add_new_link_create_keyword', $url, $keyword, $title );
251 $timestamp = date( 'Y-m-d H:i:s' );
252 $id = yourls_get_next_decimal();
255 $keyword = yourls_int2string( $id );
256 $keyword = yourls_apply_filter( 'random_keyword', $keyword, $url, $title );
257 $free = yourls_keyword_is_free($keyword);
258 $add_url = @yourls_insert_link_in_db( $url, $keyword, $title );
259 $ok = ($free && $add_url);
260 if ( $ok === false && $add_url === 1 ) {
261 // we stored something, but shouldn't have (ie reserved id)
262 $delete = yourls_delete_link_by_keyword( $keyword );
263 $return['extra_info'] .= '(deleted '.$keyword.')';
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;
275 @yourls_update_next_decimal( $id );
278 // URL was already stored
281 yourls_do_action( 'add_new_link_already_stored', $url, $keyword, $title );
283 $return['status'] = 'fail';
284 $return['code'] = 'error:url';
285 $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 );
286 $return['message'] = /* //translators: eg "http://someurl/ already exists" */ yourls_s( '%s already exists in database', yourls_trim_long_string( $strip_url ) );
287 $return['title'] = $url_exists->title;
288 $return['shorturl'] = YOURLS_SITE .'/'. $url_exists->keyword;
291 yourls_do_action( 'post_add_new_link', $url, $keyword, $title );
293 $return['statusCode'] = 200; // regardless of result, this is still a valid request
294 return yourls_apply_filter( 'add_new_link', $return, $url, $keyword, $title );
302 function yourls_edit_link( $url, $keyword, $newkeyword='', $title='' ) {
305 $table = YOURLS_DB_TABLE_URL;
306 $url = yourls_escape (yourls_sanitize_url( $url ) );
307 $keyword = yourls_escape( yourls_sanitize_string( $keyword ) );
308 $title = yourls_escape( yourls_sanitize_title( $title ) );
309 $newkeyword = yourls_escape( yourls_sanitize_string( $newkeyword ) );
310 $strip_url = stripslashes( $url );
311 $strip_title = stripslashes( $title );
312 $old_url = $ydb->get_var( "SELECT `url` FROM `$table` WHERE `keyword` = '$keyword';" );
314 // Check if new URL is not here already
315 if ( $old_url != $url && !yourls_allow_duplicate_longurls() ) {
316 $new_url_already_there = intval($ydb->get_var("SELECT COUNT(keyword) FROM `$table` WHERE `url` = '$strip_url';"));
318 $new_url_already_there = false;
321 // Check if the new keyword is not here already
322 if ( $newkeyword != $keyword ) {
323 $keyword_is_ok = yourls_keyword_is_free( $newkeyword );
325 $keyword_is_ok = true;
328 yourls_do_action( 'pre_edit_link', $url, $keyword, $newkeyword, $new_url_already_there, $keyword_is_ok );
331 if ( ( !$new_url_already_there || yourls_allow_duplicate_longurls() ) && $keyword_is_ok ) {
332 $update_url = $ydb->query( "UPDATE `$table` SET `url` = '$url', `keyword` = '$newkeyword', `title` = '$title' WHERE `keyword` = '$keyword';" );
334 $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 ) );
335 $return['status'] = 'success';
336 $return['message'] = yourls__( 'Link updated in database' );
338 $return['status'] = 'fail';
339 $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 ) ;
344 $return['status'] = 'fail';
345 $return['message'] = yourls__( 'URL or keyword already exists in database' );
348 return yourls_apply_filter( 'edit_link', $return, $url, $keyword, $newkeyword, $title, $new_url_already_there, $keyword_is_ok );
352 * Update a title link (no checks for duplicates etc..)
355 function yourls_edit_link_title( $keyword, $title ) {
358 $keyword = yourls_escape( yourls_sanitize_keyword( $keyword ) );
359 $title = yourls_escape( yourls_sanitize_title( $title ) );
361 $table = YOURLS_DB_TABLE_URL;
362 $update = $ydb->query("UPDATE `$table` SET `title` = '$title' WHERE `keyword` = '$keyword';");
369 * Check if keyword id is free (ie not already taken, and not reserved). Return bool.
372 function yourls_keyword_is_free( $keyword ) {
374 if ( yourls_keyword_is_reserved( $keyword ) or yourls_keyword_is_taken( $keyword ) )
377 return yourls_apply_filter( 'keyword_is_free', $free, $keyword );
381 * Check if a keyword is taken (ie there is already a short URL with this id). Return bool.
384 function yourls_keyword_is_taken( $keyword ) {
386 // Allow plugins to short-circuit the whole function
387 $pre = yourls_apply_filter( 'shunt_keyword_is_taken', false, $keyword );
388 if ( false !== $pre )
392 $keyword = yourls_sanitize_keyword( $keyword );
394 $table = YOURLS_DB_TABLE_URL;
395 $already_exists = $ydb->get_var( "SELECT COUNT(`keyword`) FROM `$table` WHERE `keyword` = '$keyword';" );
396 if ( $already_exists )
399 return yourls_apply_filter( 'keyword_is_taken', $taken, $keyword );
407 function yourls_db_connect() {
410 if ( !defined( 'YOURLS_DB_USER' )
411 or !defined( 'YOURLS_DB_PASS' )
412 or !defined( 'YOURLS_DB_NAME' )
413 or !defined( 'YOURLS_DB_HOST' )
414 or !class_exists( 'ezSQL_mysql', false )
415 ) yourls_die ( yourls__( 'DB config missing, or could not find DB class' ), yourls__( 'Fatal error' ), 503 );
417 // Are we standalone or in the WordPress environment?
418 if ( class_exists( 'wpdb', false ) ) {
419 /* TODO: should we deprecate this? Follow WP dev in that area */
420 $ydb = new wpdb( YOURLS_DB_USER, YOURLS_DB_PASS, YOURLS_DB_NAME, YOURLS_DB_HOST );
422 yourls_set_DB_driver();
425 if ( $ydb->last_error )
426 yourls_die( $ydb->last_error, yourls__( 'Fatal error' ), 503 );
428 if ( defined( 'YOURLS_DEBUG' ) && YOURLS_DEBUG === true )
429 $ydb->show_errors = true;
438 function yourls_xml_encode( $array ) {
439 require_once( YOURLS_INC.'/functions-xml.php' );
440 $converter= new yourls_array2xml;
441 return $converter->array2xml( $array );
445 * Return array of all informations associated with keyword. Returns false if keyword not found. Set optional $use_cache to false to force fetching from DB
448 function yourls_get_keyword_infos( $keyword, $use_cache = true ) {
450 $keyword = yourls_sanitize_string( $keyword );
452 yourls_do_action( 'pre_get_keyword', $keyword, $use_cache );
454 if( isset( $ydb->infos[$keyword] ) && $use_cache == true ) {
455 return yourls_apply_filter( 'get_keyword_infos', $ydb->infos[$keyword], $keyword );
458 yourls_do_action( 'get_keyword_not_cached', $keyword );
460 $table = YOURLS_DB_TABLE_URL;
461 $infos = $ydb->get_row( "SELECT * FROM `$table` WHERE `keyword` = '$keyword'" );
464 $infos = (array)$infos;
465 $ydb->infos[ $keyword ] = $infos;
467 $ydb->infos[ $keyword ] = false;
470 return yourls_apply_filter( 'get_keyword_infos', $ydb->infos[$keyword], $keyword );
474 * Return (string) selected information associated with a keyword. Optional $notfound = string default message if nothing found
477 function yourls_get_keyword_info( $keyword, $field, $notfound = false ) {
479 // Allow plugins to short-circuit the whole function
480 $pre = yourls_apply_filter( 'shunt_get_keyword_info', false, $keyword, $field, $notfound );
481 if ( false !== $pre )
484 $keyword = yourls_sanitize_string( $keyword );
485 $infos = yourls_get_keyword_infos( $keyword );
488 if ( isset( $infos[ $field ] ) && $infos[ $field ] !== false )
489 $return = $infos[ $field ];
491 return yourls_apply_filter( 'get_keyword_info', $return, $keyword, $field, $notfound );
495 * Return title associated with keyword. Optional $notfound = string default message if nothing found
498 function yourls_get_keyword_title( $keyword, $notfound = false ) {
499 return yourls_get_keyword_info( $keyword, 'title', $notfound );
503 * Return long URL associated with keyword. Optional $notfound = string default message if nothing found
506 function yourls_get_keyword_longurl( $keyword, $notfound = false ) {
507 return yourls_get_keyword_info( $keyword, 'url', $notfound );
511 * Return number of clicks on a keyword. Optional $notfound = string default message if nothing found
514 function yourls_get_keyword_clicks( $keyword, $notfound = false ) {
515 return yourls_get_keyword_info( $keyword, 'clicks', $notfound );
519 * Return IP that added a keyword. Optional $notfound = string default message if nothing found
522 function yourls_get_keyword_IP( $keyword, $notfound = false ) {
523 return yourls_get_keyword_info( $keyword, 'ip', $notfound );
527 * Return timestamp associated with a keyword. Optional $notfound = string default message if nothing found
530 function yourls_get_keyword_timestamp( $keyword, $notfound = false ) {
531 return yourls_get_keyword_info( $keyword, 'timestamp', $notfound );
535 * Update click count on a short URL. Return 0/1 for error/success.
538 function yourls_update_clicks( $keyword, $clicks = false ) {
539 // Allow plugins to short-circuit the whole function
540 $pre = yourls_apply_filter( 'shunt_update_clicks', false, $keyword, $clicks );
541 if ( false !== $pre )
545 $keyword = yourls_sanitize_string( $keyword );
546 $table = YOURLS_DB_TABLE_URL;
547 if ( $clicks !== false && is_int( $clicks ) && $clicks >= 0 )
548 $update = $ydb->query( "UPDATE `$table` SET `clicks` = $clicks WHERE `keyword` = '$keyword'" );
550 $update = $ydb->query( "UPDATE `$table` SET `clicks` = clicks + 1 WHERE `keyword` = '$keyword'" );
552 yourls_do_action( 'update_clicks', $keyword, $update, $clicks );
557 * Return array of stats. (string)$filter is 'bottom', 'last', 'rand' or 'top'. (int)$limit is the number of links to return
560 function yourls_get_stats( $filter = 'top', $limit = 10, $start = 0 ) {
569 $sort_by = 'timestamp';
570 $sort_order = 'desc';
580 $sort_order = 'desc';
585 $limit = intval( $limit );
586 $start = intval( $start );
589 $table_url = YOURLS_DB_TABLE_URL;
590 $results = $ydb->get_results( "SELECT * FROM `$table_url` WHERE 1=1 ORDER BY `$sort_by` $sort_order LIMIT $start, $limit;" );
595 foreach ( (array)$results as $res ) {
596 $return['links']['link_'.$i++] = array(
597 'shorturl' => YOURLS_SITE .'/'. $res->keyword,
599 'title' => $res->title,
600 'timestamp'=> $res->timestamp,
602 'clicks' => $res->clicks,
607 $return['stats'] = yourls_get_db_stats();
609 $return['statusCode'] = 200;
611 return yourls_apply_filter( 'get_stats', $return, $filter, $limit, $start );
615 * Return array of stats. (string)$filter is 'bottom', 'last', 'rand' or 'top'. (int)$limit is the number of links to return
618 function yourls_get_link_stats( $shorturl ) {
621 $table_url = YOURLS_DB_TABLE_URL;
622 $res = $ydb->get_row( "SELECT * FROM `$table_url` WHERE keyword = '$shorturl';" );
629 'message' => 'Error: short URL not found',
634 'message' => 'success',
636 'shorturl' => YOURLS_SITE .'/'. $res->keyword,
638 'title' => $res->title,
639 'timestamp'=> $res->timestamp,
641 'clicks' => $res->clicks,
646 return yourls_apply_filter( 'get_link_stats', $return, $shorturl );
650 * Get total number of URLs and sum of clicks. Input: optional "AND WHERE" clause. Returns array
653 function yourls_get_db_stats( $where = '' ) {
655 $table_url = YOURLS_DB_TABLE_URL;
657 $totals = $ydb->get_row( "SELECT COUNT(keyword) as count, SUM(clicks) as sum FROM `$table_url` WHERE 1=1 $where" );
658 $return = array( 'total_links' => $totals->count, 'total_clicks' => $totals->sum );
660 return yourls_apply_filter( 'get_db_stats', $return, $where );
664 * Get number of SQL queries performed
667 function yourls_get_num_queries() {
670 return yourls_apply_filter( 'get_num_queries', $ydb->num_queries );
674 * Returns a sanitized a user agent string. Given what I found on http://www.user-agents.org/ it should be OK.
677 function yourls_get_user_agent() {
678 if ( !isset( $_SERVER['HTTP_USER_AGENT'] ) )
681 $ua = strip_tags( html_entity_decode( $_SERVER['HTTP_USER_AGENT'] ));
682 $ua = preg_replace('![^0-9a-zA-Z\':., /{}\(\)\[\]\+@&\!\?;_\-=~\*\#]!', '', $ua );
684 return yourls_apply_filter( 'get_user_agent', substr( $ua, 0, 254 ) );
688 * Redirect to another page
691 function yourls_redirect( $location, $code = 301 ) {
692 yourls_do_action( 'pre_redirect', $location, $code );
693 $location = yourls_apply_filter( 'redirect_location', $location, $code );
694 $code = yourls_apply_filter( 'redirect_code', $code, $location );
695 // Redirect, either properly if possible, or via Javascript otherwise
696 if( !headers_sent() ) {
697 yourls_status_header( $code );
698 header( "Location: $location" );
700 yourls_redirect_javascript( $location );
706 * Set HTTP status header
709 function yourls_status_header( $code = 200 ) {
713 $protocol = $_SERVER["SERVER_PROTOCOL"];
714 if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
715 $protocol = 'HTTP/1.0';
717 $code = intval( $code );
718 $desc = yourls_get_HTTP_status( $code );
720 @header ("$protocol $code $desc"); // This causes problems on IIS and some FastCGI setups
721 yourls_do_action( 'status_header', $code );
725 * Redirect to another page using Javascript. Set optional (bool)$dontwait to false to force manual redirection (make sure a message has been read by user)
728 function yourls_redirect_javascript( $location, $dontwait = true ) {
729 yourls_do_action( 'pre_redirect_javascript', $location, $dontwait );
730 $location = yourls_apply_filter( 'redirect_javascript', $location, $dontwait );
732 $message = yourls_s( 'if you are not redirected after 10 seconds, please <a href="%s">click here</a>', $location );
734 <script type="text/javascript">
735 window.location="$location";
737 <small>($message)</small>
740 echo '<p>' . yourls_s( 'Please <a href="%s">click here</a>', $location ) . '</p>';
742 yourls_do_action( 'post_redirect_javascript', $location );
746 * Return a HTTP status code
749 function yourls_get_HTTP_status( $code ) {
750 $code = intval( $code );
751 $headers_desc = array(
753 101 => 'Switching Protocols',
759 203 => 'Non-Authoritative Information',
761 205 => 'Reset Content',
762 206 => 'Partial Content',
763 207 => 'Multi-Status',
766 300 => 'Multiple Choices',
767 301 => 'Moved Permanently',
770 304 => 'Not Modified',
773 307 => 'Temporary Redirect',
775 400 => 'Bad Request',
776 401 => 'Unauthorized',
777 402 => 'Payment Required',
780 405 => 'Method Not Allowed',
781 406 => 'Not Acceptable',
782 407 => 'Proxy Authentication Required',
783 408 => 'Request Timeout',
786 411 => 'Length Required',
787 412 => 'Precondition Failed',
788 413 => 'Request Entity Too Large',
789 414 => 'Request-URI Too Long',
790 415 => 'Unsupported Media Type',
791 416 => 'Requested Range Not Satisfiable',
792 417 => 'Expectation Failed',
793 422 => 'Unprocessable Entity',
795 424 => 'Failed Dependency',
796 426 => 'Upgrade Required',
798 500 => 'Internal Server Error',
799 501 => 'Not Implemented',
800 502 => 'Bad Gateway',
801 503 => 'Service Unavailable',
802 504 => 'Gateway Timeout',
803 505 => 'HTTP Version Not Supported',
804 506 => 'Variant Also Negotiates',
805 507 => 'Insufficient Storage',
806 510 => 'Not Extended'
809 if ( isset( $headers_desc[$code] ) )
810 return $headers_desc[$code];
817 * Log a redirect (for stats)
820 function yourls_log_redirect( $keyword ) {
821 // Allow plugins to short-circuit the whole function
822 $pre = yourls_apply_filter( 'shunt_log_redirect', false, $keyword );
823 if ( false !== $pre )
826 if ( !yourls_do_log_redirect() )
830 $table = YOURLS_DB_TABLE_LOG;
832 $keyword = yourls_sanitize_string( $keyword );
833 $referrer = ( isset( $_SERVER['HTTP_REFERER'] ) ? yourls_sanitize_url( $_SERVER['HTTP_REFERER'] ) : 'direct' );
834 $ua = yourls_get_user_agent();
835 $ip = yourls_get_IP();
836 $location = yourls_geo_ip_to_countrycode( $ip );
838 return $ydb->query( "INSERT INTO `$table` (click_time, shorturl, referrer, user_agent, ip_address, country_code) VALUES (NOW(), '$keyword', '$referrer', '$ua', '$ip', '$location')" );
842 * Check if we want to not log redirects (for stats)
845 function yourls_do_log_redirect() {
846 return ( !defined( 'YOURLS_NOSTATS' ) || YOURLS_NOSTATS != true );
850 * Converts an IP to a 2 letter country code, using GeoIP database if available in includes/geo/
853 function yourls_geo_ip_to_countrycode( $ip = '', $default = '' ) {
854 // Allow plugins to short-circuit the Geo IP API
855 $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
856 if ( false !== $location )
859 if ( !file_exists( YOURLS_INC.'/geo/GeoIP.dat') || !file_exists( YOURLS_INC.'/geo/geoip.inc') )
863 $ip = yourls_get_IP();
865 require_once( YOURLS_INC.'/geo/geoip.inc') ;
866 $gi = geoip_open( YOURLS_INC.'/geo/GeoIP.dat', GEOIP_STANDARD);
867 $location = geoip_country_code_by_addr($gi, $ip);
870 return yourls_apply_filter( 'geo_ip_to_countrycode', $location, $ip, $default );
874 * Converts a 2 letter country code to long name (ie AU -> Australia)
877 function yourls_geo_countrycode_to_countryname( $code ) {
878 // Allow plugins to short-circuit the Geo IP API
879 $country = yourls_apply_filter( 'shunt_geo_countrycode_to_countryname', false, $code );
880 if ( false !== $country )
883 // Load the Geo class if not already done
884 if( !class_exists( 'GeoIP', false ) ) {
885 $temp = yourls_geo_ip_to_countrycode( '127.0.0.1' );
888 if( class_exists( 'GeoIP', false ) ) {
890 $id = $geo->GEOIP_COUNTRY_CODE_TO_NUMBER[ $code ];
891 $long = $geo->GEOIP_COUNTRY_NAMES[ $id ];
899 * Return flag URL from 2 letter country code
902 function yourls_geo_get_flag( $code ) {
903 if( file_exists( YOURLS_INC.'/geo/flags/flag_'.strtolower($code).'.gif' ) ) {
904 $img = yourls_match_current_protocol( YOURLS_SITE.'/includes/geo/flags/flag_'.( strtolower( $code ) ).'.gif' );
908 return yourls_apply_filter( 'geo_get_flag', $img, $code );
913 * Check if an upgrade is needed
916 function yourls_upgrade_is_needed() {
917 // check YOURLS_DB_VERSION exist && match values stored in YOURLS_DB_TABLE_OPTIONS
918 list( $currentver, $currentsql ) = yourls_get_current_version_from_sql();
919 if( $currentsql < YOURLS_DB_VERSION )
926 * Get current version & db version as stored in the options DB. Prior to 1.4 there's no option table.
929 function yourls_get_current_version_from_sql() {
930 $currentver = yourls_get_option( 'version' );
931 $currentsql = yourls_get_option( 'db_version' );
933 // Values if version is 1.3
939 return array( $currentver, $currentsql);
943 * Read an option from DB (or from cache if available). Return value or $default if not found
946 function yourls_get_option( $option_name, $default = false ) {
949 // Allow plugins to short-circuit options
950 $pre = yourls_apply_filter( 'shunt_option_'.$option_name, false );
951 if ( false !== $pre )
954 // If option not cached already, get its value from the DB
955 if ( !isset( $ydb->option[$option_name] ) ) {
956 $table = YOURLS_DB_TABLE_OPTIONS;
957 $option_name = yourls_escape( $option_name );
958 $row = $ydb->get_row( "SELECT `option_value` FROM `$table` WHERE `option_name` = '$option_name' LIMIT 1" );
959 if ( is_object( $row) ) { // Has to be get_row instead of get_var because of funkiness with 0, false, null values
960 $value = $row->option_value;
961 } else { // option does not exist, so we must cache its non-existence
964 $ydb->option[ $option_name ] = yourls_maybe_unserialize( $value );
967 return yourls_apply_filter( 'get_option_'.$option_name, $ydb->option[$option_name] );
971 * Read all options from DB at once
974 function yourls_get_all_options() {
977 // Allow plugins to short-circuit all options. (Note: regular plugins are loaded after all options)
978 $pre = yourls_apply_filter( 'shunt_all_options', false );
979 if ( false !== $pre )
982 $table = YOURLS_DB_TABLE_OPTIONS;
984 $allopt = $ydb->get_results( "SELECT `option_name`, `option_value` FROM `$table` WHERE 1=1" );
986 foreach( (array)$allopt as $option ) {
987 $ydb->option[$option->option_name] = yourls_maybe_unserialize( $option->option_value );
990 $ydb->option = yourls_apply_filter( 'get_all_options', $ydb->option );
994 * Update (add if doesn't exist) an option to DB
997 function yourls_update_option( $option_name, $newvalue ) {
999 $table = YOURLS_DB_TABLE_OPTIONS;
1001 $safe_option_name = yourls_escape( $option_name );
1003 $oldvalue = yourls_get_option( $safe_option_name );
1005 // If the new and old values are the same, no need to update.
1006 if ( $newvalue === $oldvalue )
1009 if ( false === $oldvalue ) {
1010 yourls_add_option( $option_name, $newvalue );
1014 $_newvalue = yourls_escape( yourls_maybe_serialize( $newvalue ) );
1016 yourls_do_action( 'update_option', $option_name, $oldvalue, $newvalue );
1018 $ydb->query( "UPDATE `$table` SET `option_value` = '$_newvalue' WHERE `option_name` = '$option_name'" );
1020 if ( $ydb->rows_affected == 1 ) {
1021 $ydb->option[ $option_name ] = $newvalue;
1028 * Add an option to the DB
1031 function yourls_add_option( $name, $value = '' ) {
1033 $table = YOURLS_DB_TABLE_OPTIONS;
1034 $safe_name = yourls_escape( $name );
1036 // Make sure the option doesn't already exist
1037 if ( false !== yourls_get_option( $safe_name ) )
1040 $_value = yourls_escape( yourls_maybe_serialize( $value ) );
1042 yourls_do_action( 'add_option', $safe_name, $_value );
1044 $ydb->query( "INSERT INTO `$table` (`option_name`, `option_value`) VALUES ('$name', '$_value')" );
1045 $ydb->option[ $name ] = $value;
1051 * Delete an option from the DB
1054 function yourls_delete_option( $name ) {
1056 $table = YOURLS_DB_TABLE_OPTIONS;
1057 $name = yourls_escape( $name );
1059 // Get the ID, if no ID then return
1060 $option = $ydb->get_row( "SELECT option_id FROM `$table` WHERE `option_name` = '$name'" );
1061 if ( is_null( $option ) || !$option->option_id )
1064 yourls_do_action( 'delete_option', $option_name );
1066 $ydb->query( "DELETE FROM `$table` WHERE `option_name` = '$name'" );
1073 * Serialize data if needed. Stolen from WordPress
1076 function yourls_maybe_serialize( $data ) {
1077 if ( is_array( $data ) || is_object( $data ) )
1078 return serialize( $data );
1080 if ( yourls_is_serialized( $data ) )
1081 return serialize( $data );
1087 * Check value to find if it was serialized. Stolen from WordPress
1090 function yourls_is_serialized( $data ) {
1091 // if it isn't a string, it isn't serialized
1092 if ( !is_string( $data ) )
1094 $data = trim( $data );
1095 if ( 'N;' == $data )
1097 if ( !preg_match( '/^([adObis]):/', $data, $badions ) )
1099 switch ( $badions[1] ) {
1103 if ( preg_match( "/^{$badions[1]}:[0-9]+:.*[;}]\$/s", $data ) )
1109 if ( preg_match( "/^{$badions[1]}:[0-9.E-]+;\$/", $data ) )
1117 * Unserialize value only if it was serialized. Stolen from WP
1120 function yourls_maybe_unserialize( $original ) {
1121 if ( yourls_is_serialized( $original ) ) // don't attempt to unserialize data that wasn't serialized going in
1122 return @unserialize( $original );
1127 * Determine if the current page is private
1130 function yourls_is_private() {
1133 if ( defined('YOURLS_PRIVATE') && YOURLS_PRIVATE == true ) {
1135 // Allow overruling for particular pages:
1138 if( yourls_is_API() ) {
1139 if( !defined('YOURLS_PRIVATE_API') || YOURLS_PRIVATE_API != false )
1143 } elseif( yourls_is_infos() ) {
1144 if( !defined('YOURLS_PRIVATE_INFOS') || YOURLS_PRIVATE_INFOS !== false )
1154 return yourls_apply_filter( 'is_private', $private );
1158 * Show login form if required
1161 function yourls_maybe_require_auth() {
1162 if( yourls_is_private() ) {
1163 yourls_do_action( 'require_auth' );
1164 require_once( YOURLS_INC.'/auth.php' );
1166 yourls_do_action( 'require_no_auth' );
1171 * Allow several short URLs for the same long URL ?
1174 function yourls_allow_duplicate_longurls() {
1175 // special treatment if API to check for WordPress plugin requests
1176 if( yourls_is_API() ) {
1177 if ( isset($_REQUEST['source']) && $_REQUEST['source'] == 'plugin' )
1180 return ( defined( 'YOURLS_UNIQUE_URLS' ) && YOURLS_UNIQUE_URLS == false );
1184 * Return list of all shorturls associated to the same long URL. Returns NULL or array of keywords.
1187 function yourls_get_duplicate_keywords( $longurl ) {
1188 if( !yourls_allow_duplicate_longurls() )
1192 $longurl = yourls_escape( yourls_sanitize_url($longurl) );
1193 $table = YOURLS_DB_TABLE_URL;
1195 $return = $ydb->get_col( "SELECT `keyword` FROM `$table` WHERE `url` = '$longurl'" );
1196 return yourls_apply_filter( 'get_duplicate_keywords', $return, $longurl );
1200 * Check if an IP shortens URL too fast to prevent DB flood. Return true, or die.
1203 function yourls_check_IP_flood( $ip = '' ) {
1205 // Allow plugins to short-circuit the whole function
1206 $pre = yourls_apply_filter( 'shunt_check_IP_flood', false, $ip );
1207 if ( false !== $pre )
1210 yourls_do_action( 'pre_check_ip_flood', $ip ); // at this point $ip can be '', check it if your plugin hooks in here
1213 ( defined('YOURLS_FLOOD_DELAY_SECONDS') && YOURLS_FLOOD_DELAY_SECONDS === 0 ) ||
1214 !defined('YOURLS_FLOOD_DELAY_SECONDS')
1218 $ip = ( $ip ? yourls_sanitize_ip( $ip ) : yourls_get_IP() );
1220 // Don't throttle whitelist IPs
1221 if( defined( 'YOURLS_FLOOD_IP_WHITELIST' ) && YOURLS_FLOOD_IP_WHITELIST ) {
1222 $whitelist_ips = explode( ',', YOURLS_FLOOD_IP_WHITELIST );
1223 foreach( (array)$whitelist_ips as $whitelist_ip ) {
1224 $whitelist_ip = trim( $whitelist_ip );
1225 if ( $whitelist_ip == $ip )
1230 // Don't throttle logged in users
1231 if( yourls_is_private() ) {
1232 if( yourls_is_valid_user() === true )
1236 yourls_do_action( 'check_ip_flood', $ip );
1239 $table = YOURLS_DB_TABLE_URL;
1241 $lasttime = $ydb->get_var( "SELECT `timestamp` FROM $table WHERE `ip` = '$ip' ORDER BY `timestamp` DESC LIMIT 1" );
1244 $then = date( 'U', strtotime( $lasttime ) );
1245 if( ( $now - $then ) <= YOURLS_FLOOD_DELAY_SECONDS ) {
1247 yourls_do_action( 'ip_flood', $ip, $now - $then );
1248 yourls_die( yourls__( 'Too many URLs added too fast. Slow down please.' ), yourls__( 'Forbidden' ), 403 );
1256 * Check if YOURLS is installing
1261 function yourls_is_installing() {
1262 $installing = defined( 'YOURLS_INSTALLING' ) && YOURLS_INSTALLING == true;
1263 return yourls_apply_filter( 'is_installing', $installing );
1267 * Check if YOURLS is upgrading
1272 function yourls_is_upgrading() {
1273 $upgrading = defined( 'YOURLS_UPGRADING' ) && YOURLS_UPGRADING == true;
1274 return yourls_apply_filter( 'is_upgrading', $upgrading );
1279 * Check if YOURLS is installed
1282 function yourls_is_installed() {
1283 static $is_installed = false;
1284 if ( $is_installed === false ) {
1285 $check_14 = $check_13 = false;
1287 if( defined('YOURLS_DB_TABLE_NEXTDEC') )
1288 $check_13 = $ydb->get_var('SELECT `next_id` FROM '.YOURLS_DB_TABLE_NEXTDEC);
1289 $check_14 = yourls_get_option( 'version' );
1290 $is_installed = $check_13 || $check_14;
1292 return yourls_apply_filter( 'is_installed', $is_installed );
1296 * Generate random string of (int)$length length and type $type (see function for details)
1299 function yourls_rnd_string ( $length = 5, $type = 0, $charlist = '' ) {
1301 $length = intval( $length );
1303 // define possible characters
1306 // custom char list, or comply to charset as defined in config
1308 $possible = $charlist ? $charlist : yourls_get_shorturl_charset() ;
1311 // no vowels to make no offending word, no 0/1/o/l to avoid confusion between letters & digits. Perfect for passwords.
1313 $possible = "23456789bcdfghjkmnpqrstvwxyz";
1316 // Same, with lower + upper
1318 $possible = "23456789bcdfghjkmnpqrstvwxyzBCDFGHJKMNPQRSTVWXYZ";
1321 // all letters, lowercase
1323 $possible = "abcdefghijklmnopqrstuvwxyz";
1326 // all letters, lowercase + uppercase
1328 $possible = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
1331 // all digits & letters lowercase
1333 $possible = "0123456789abcdefghijklmnopqrstuvwxyz";
1336 // all digits & letters lowercase + uppercase
1338 $possible = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
1344 while ($i < $length) {
1345 $str .= substr($possible, mt_rand(0, strlen($possible)-1), 1);
1349 return yourls_apply_filter( 'rnd_string', $str, $length, $type, $charlist );
1353 * Return salted string
1356 function yourls_salt( $string ) {
1357 $salt = defined('YOURLS_COOKIEKEY') ? YOURLS_COOKIEKEY : md5(__FILE__) ;
1358 return yourls_apply_filter( 'yourls_salt', md5 ($string . $salt), $string );
1362 * Add a query var to a URL and return URL. Completely stolen from WP.
1364 * Works with one of these parameter patterns:
1365 * array( 'var' => 'value' )
1366 * array( 'var' => 'value' ), $url
1368 * 'var', 'value', $url
1369 * If $url ommited, uses $_SERVER['REQUEST_URI']
1372 function yourls_add_query_arg() {
1374 if ( is_array( func_get_arg(0) ) ) {
1375 if ( @func_num_args() < 2 || false === @func_get_arg( 1 ) )
1376 $uri = $_SERVER['REQUEST_URI'];
1378 $uri = @func_get_arg( 1 );
1380 if ( @func_num_args() < 3 || false === @func_get_arg( 2 ) )
1381 $uri = $_SERVER['REQUEST_URI'];
1383 $uri = @func_get_arg( 2 );
1386 $uri = str_replace( '&', '&', $uri );
1389 if ( $frag = strstr( $uri, '#' ) )
1390 $uri = substr( $uri, 0, -strlen( $frag ) );
1394 if ( preg_match( '|^https?://|i', $uri, $matches ) ) {
1395 $protocol = $matches[0];
1396 $uri = substr( $uri, strlen( $protocol ) );
1401 if ( strpos( $uri, '?' ) !== false ) {
1402 $parts = explode( '?', $uri, 2 );
1403 if ( 1 == count( $parts ) ) {
1407 $base = $parts[0] . '?';
1410 } elseif ( !empty( $protocol ) || strpos( $uri, '=' ) === false ) {
1418 parse_str( $query, $qs );
1419 $qs = yourls_urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
1420 if ( is_array( func_get_arg( 0 ) ) ) {
1421 $kayvees = func_get_arg( 0 );
1422 $qs = array_merge( $qs, $kayvees );
1424 $qs[func_get_arg( 0 )] = func_get_arg( 1 );
1427 foreach ( (array) $qs as $k => $v ) {
1432 $ret = http_build_query( $qs );
1433 $ret = trim( $ret, '?' );
1434 $ret = preg_replace( '#=(&|$)#', '$1', $ret );
1435 $ret = $protocol . $base . $ret . $frag;
1436 $ret = rtrim( $ret, '?' );
1441 * Navigates through an array and encodes the values to be used in a URL. Stolen from WP, used in yourls_add_query_arg()
1444 function yourls_urlencode_deep( $value ) {
1445 $value = is_array( $value ) ? array_map( 'yourls_urlencode_deep', $value ) : urlencode( $value );
1450 * Remove arg from query. Opposite of yourls_add_query_arg. Stolen from WP.
1453 function yourls_remove_query_arg( $key, $query = false ) {
1454 if ( is_array( $key ) ) { // removing multiple keys
1455 foreach ( $key as $k )
1456 $query = yourls_add_query_arg( $k, false, $query );
1459 return yourls_add_query_arg( $key, false, $query );
1463 * Return a time-dependent string for nonce creation
1466 function yourls_tick() {
1467 return ceil( time() / YOURLS_NONCE_LIFE );
1471 * Create a time limited, action limited and user limited token
1474 function yourls_create_nonce( $action, $user = false ) {
1475 if( false == $user )
1476 $user = defined( 'YOURLS_USER' ) ? YOURLS_USER : '-1';
1477 $tick = yourls_tick();
1478 return substr( yourls_salt($tick . $action . $user), 0, 10 );
1482 * Create a nonce field for inclusion into a form
1485 function yourls_nonce_field( $action, $name = 'nonce', $user = false, $echo = true ) {
1486 $field = '<input type="hidden" id="'.$name.'" name="'.$name.'" value="'.yourls_create_nonce( $action, $user ).'" />';
1493 * Add a nonce to a URL. If URL omitted, adds nonce to current URL
1496 function yourls_nonce_url( $action, $url = false, $name = 'nonce', $user = false ) {
1497 $nonce = yourls_create_nonce( $action, $user );
1498 return yourls_add_query_arg( $name, $nonce, $url );
1502 * Check validity of a nonce (ie time span, user and action match).
1504 * Returns true if valid, dies otherwise (yourls_die() or die($return) if defined)
1505 * if $nonce is false or unspecified, it will use $_REQUEST['nonce']
1508 function yourls_verify_nonce( $action, $nonce = false, $user = false, $return = '' ) {
1510 if( false == $user )
1511 $user = defined( 'YOURLS_USER' ) ? YOURLS_USER : '-1';
1513 // get current nonce value
1514 if( false == $nonce && isset( $_REQUEST['nonce'] ) )
1515 $nonce = $_REQUEST['nonce'];
1517 // what nonce should be
1518 $valid = yourls_create_nonce( $action, $user );
1520 if( $nonce == $valid ) {
1525 yourls_die( yourls__( 'Unauthorized action or expired link' ), yourls__( 'Error' ), 403 );
1530 * Converts keyword into short link (prepend with YOURLS base URL)
1533 function yourls_link( $keyword = '' ) {
1534 $link = YOURLS_SITE . '/' . yourls_sanitize_keyword( $keyword );
1535 return yourls_apply_filter( 'yourls_link', $link, $keyword );
1539 * Converts keyword into stat link (prepend with YOURLS base URL, append +)
1542 function yourls_statlink( $keyword = '' ) {
1543 $link = YOURLS_SITE . '/' . yourls_sanitize_keyword( $keyword ) . '+';
1544 if( yourls_is_ssl() )
1545 $link = str_replace( 'http://', 'https://', $link );
1546 return yourls_apply_filter( 'yourls_statlink', $link, $keyword );
1550 * Check if we're in API mode. Returns bool
1553 function yourls_is_API() {
1554 if ( defined( 'YOURLS_API' ) && YOURLS_API == true )
1560 * Check if we're in Ajax mode. Returns bool
1563 function yourls_is_Ajax() {
1564 if ( defined( 'YOURLS_AJAX' ) && YOURLS_AJAX == true )
1570 * Check if we're in GO mode (yourls-go.php). Returns bool
1573 function yourls_is_GO() {
1574 if ( defined( 'YOURLS_GO' ) && YOURLS_GO == true )
1580 * Check if we're displaying stats infos (yourls-infos.php). Returns bool
1583 function yourls_is_infos() {
1584 if ( defined( 'YOURLS_INFOS' ) && YOURLS_INFOS == true )
1590 * Check if we'll need interface display function (ie not API or redirection)
1593 function yourls_has_interface() {
1594 if( yourls_is_API() or yourls_is_GO() )
1600 * Check if we're in the admin area. Returns bool
1603 function yourls_is_admin() {
1604 if ( defined( 'YOURLS_ADMIN' ) && YOURLS_ADMIN == true )
1610 * Check if the server seems to be running on Windows. Not exactly sure how reliable this is.
1613 function yourls_is_windows() {
1614 return defined( 'DIRECTORY_SEPARATOR' ) && DIRECTORY_SEPARATOR == '\\';
1618 * Check if SSL is required. Returns bool.
1621 function yourls_needs_ssl() {
1622 if ( defined('YOURLS_ADMIN_SSL') && YOURLS_ADMIN_SSL == true )
1628 * Return admin link, with SSL preference if applicable.
1631 function yourls_admin_url( $page = '' ) {
1632 $admin = YOURLS_SITE . '/admin/' . $page;
1633 if( yourls_is_ssl() or yourls_needs_ssl() )
1634 $admin = str_replace('http://', 'https://', $admin);
1635 return yourls_apply_filter( 'admin_url', $admin, $page );
1639 * Return YOURLS_SITE or URL under YOURLS setup, with SSL preference
1642 function yourls_site_url( $echo = true, $url = '' ) {
1643 $url = yourls_get_relative_url( $url );
1644 $url = trim( YOURLS_SITE . '/' . $url, '/' );
1646 // Do not enforce (checking yourls_need_ssl() ) but check current usage so it won't force SSL on non-admin pages
1647 if( yourls_is_ssl() )
1648 $url = str_replace( 'http://', 'https://', $url );
1649 $url = yourls_apply_filter( 'site_url', $url );
1656 * Check if SSL is used, returns bool. Stolen from WP.
1659 function yourls_is_ssl() {
1661 if ( isset( $_SERVER['HTTPS'] ) ) {
1662 if ( 'on' == strtolower( $_SERVER['HTTPS'] ) )
1664 if ( '1' == $_SERVER['HTTPS'] )
1666 } elseif ( isset( $_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
1669 return yourls_apply_filter( 'is_ssl', $is_ssl );
1674 * Get a remote page <title>, return a string (either title or url)
1677 function yourls_get_remote_title( $url ) {
1678 // Allow plugins to short-circuit the whole function
1679 $pre = yourls_apply_filter( 'shunt_get_remote_title', false, $url );
1680 if ( false !== $pre )
1683 require_once( YOURLS_INC.'/functions-http.php' );
1685 $url = yourls_sanitize_url( $url );
1687 $title = $charset = false;
1689 $content = yourls_get_remote_content( $url );
1691 // If false, return url as title.
1692 // Todo: improve this with temporary title when shorturl_meta available?
1693 if( false === $content )
1696 if( $content !== false ) {
1698 if ( preg_match('/<title>(.*?)<\/title>/is', $content, $found ) ) {
1704 // <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
1705 if ( preg_match('/<meta[^>]*?charset=([^>]*?)\/?>/is', $content, $found ) ) {
1706 $charset = trim($found[1], '"\' ');
1711 // if title not found, guess if returned content was actually an error message
1712 if( $title == false && strpos( $content, 'Error' ) === 0 ) {
1716 if( $title == false )
1720 if( !yourls_seems_utf8( $title ) )
1721 $title = utf8_encode( $title );
1724 // Charset conversion. We use @ to remove warnings (mb_ functions are easily bitching about illegal chars)
1725 if( function_exists( 'mb_convert_encoding' ) ) {
1727 $title = @mb_convert_encoding( $title, 'UTF-8', $charset );
1729 $title = @mb_convert_encoding( $title, 'UTF-8' );
1733 // Remove HTML entities
1734 $title = html_entity_decode( $title, ENT_QUOTES, 'UTF-8' );
1736 // Strip out evil things
1737 $title = yourls_sanitize_title( $title );
1739 return yourls_apply_filter( 'get_remote_title', $title, $url );
1743 * Quick UA check for mobile devices. Return boolean.
1746 function yourls_is_mobile_device() {
1749 'android', 'blackberry', 'blazer',
1750 'compal', 'elaine', 'fennec', 'hiptop',
1751 'iemobile', 'iphone', 'ipod', 'ipad',
1752 'iris', 'kindle', 'opera mobi', 'opera mini',
1753 'palm', 'phone', 'pocket', 'psp', 'symbian',
1754 'treo', 'wap', 'windows ce', 'windows phone'
1757 // Current user-agent
1758 $current = strtolower( $_SERVER['HTTP_USER_AGENT'] );
1761 $is_mobile = ( str_replace( $mobiles, '', $current ) != $current );
1762 return yourls_apply_filter( 'is_mobile_device', $is_mobile );
1766 * Get request in YOURLS base (eg in 'http://site.com/yourls/abcd' get 'abdc')
1769 function yourls_get_request() {
1770 // Allow plugins to short-circuit the whole function
1771 $pre = yourls_apply_filter( 'shunt_get_request', false );
1772 if ( false !== $pre )
1775 static $request = null;
1777 yourls_do_action( 'pre_get_request', $request );
1779 if( $request !== null )
1782 // Ignore protocol & www. prefix
1783 $root = str_replace( array( 'https://', 'http://', 'https://www.', 'http://www.' ), '', YOURLS_SITE );
1784 // Case insensitive comparison of the YOURLS root to match both http://Sho.rt/blah and http://sho.rt/blah
1785 $request = preg_replace( "!$root/!i", '', $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'], 1 );
1787 // Unless request looks like a full URL (ie request is a simple keyword) strip query string
1788 if( !preg_match( "@^[a-zA-Z]+://.+@", $request ) ) {
1789 $request = current( explode( '?', $request ) );
1792 return yourls_apply_filter( 'get_request', $request );
1796 * Change protocol to match current scheme used (http or https)
1799 function yourls_match_current_protocol( $url, $normal = 'http', $ssl = 'https' ) {
1800 if( yourls_is_ssl() )
1801 $url = str_replace( $normal, $ssl, $url );
1802 return yourls_apply_filter( 'match_current_protocol', $url );
1806 * Fix $_SERVER['REQUEST_URI'] variable for various setups. Stolen from WP.
1809 function yourls_fix_request_uri() {
1811 $default_server_values = array(
1812 'SERVER_SOFTWARE' => '',
1813 'REQUEST_URI' => '',
1815 $_SERVER = array_merge( $default_server_values, $_SERVER );
1817 // Fix for IIS when running with PHP ISAPI
1818 if ( empty( $_SERVER['REQUEST_URI'] ) || ( php_sapi_name() != 'cgi-fcgi' && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) ) ) {
1821 if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
1822 $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL'];
1824 // IIS Isapi_Rewrite
1825 else if ( isset( $_SERVER['HTTP_X_REWRITE_URL'] ) ) {
1826 $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];
1828 // Use ORIG_PATH_INFO if there is no PATH_INFO
1829 if ( !isset( $_SERVER['PATH_INFO'] ) && isset( $_SERVER['ORIG_PATH_INFO'] ) )
1830 $_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];
1832 // Some IIS + PHP configurations puts the script-name in the path-info (No need to append it twice)
1833 if ( isset( $_SERVER['PATH_INFO'] ) ) {
1834 if ( $_SERVER['PATH_INFO'] == $_SERVER['SCRIPT_NAME'] )
1835 $_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO'];
1837 $_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];
1840 // Append the query string if it exists and isn't null
1841 if ( ! empty( $_SERVER['QUERY_STRING'] ) ) {
1842 $_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING'];
1849 * Shutdown function, runs just before PHP shuts down execution. Stolen from WP
1852 function yourls_shutdown() {
1853 yourls_do_action( 'shutdown' );
1857 * Auto detect custom favicon in /user directory, fallback to YOURLS favicon, and echo/return its URL
1860 function yourls_favicon( $echo = true ) {
1861 static $favicon = null;
1862 if( $favicon !== null )
1866 // search for favicon.(gif|ico|png|jpg|svg)
1867 foreach( array( 'gif', 'ico', 'png', 'jpg', 'svg' ) as $ext ) {
1868 if( file_exists( YOURLS_USERDIR. '/favicon.' . $ext ) ) {
1869 $custom = 'favicon.' . $ext;
1875 $favicon = yourls_site_url( false, YOURLS_USERURL . '/' . $custom );
1877 $favicon = yourls_site_url( false ) . '/images/favicon.gif';
1885 * Check for maintenance mode. If yes, die. See yourls_maintenance_mode(). Stolen from WP.
1888 function yourls_check_maintenance_mode() {
1890 $file = YOURLS_ABSPATH . '/.maintenance' ;
1891 if ( !file_exists( $file ) || yourls_is_upgrading() || yourls_is_installing() )
1894 global $maintenance_start;
1897 // If the $maintenance_start timestamp is older than 10 minutes, don't die.
1898 if ( ( time() - $maintenance_start ) >= 600 )
1901 // Use any /user/maintenance.php file
1902 if( file_exists( YOURLS_USERDIR.'/maintenance.php' ) ) {
1903 include( YOURLS_USERDIR.'/maintenance.php' );
1907 // https://www.youtube.com/watch?v=Xw-m4jEY-Ns
1908 $title = yourls__( 'Service temporarily unavailable' );
1909 $message = yourls__( 'Our service is currently undergoing scheduled maintenance.' ) . "</p>\n<p>" .
1910 yourls__( 'Things should not last very long, thank you for your patience and please excuse the inconvenience' );
1911 yourls_die( $message, $title , 503 );
1916 * Return current admin page, or null if not an admin page
1918 * @return mixed string if admin page, null if not an admin page
1921 function yourls_current_admin_page() {
1922 if( yourls_is_admin() ) {
1923 $current = substr( yourls_get_request(), 6 );
1924 if( $current === false )
1925 $current = 'index.php'; // if current page is http://sho.rt/admin/ instead of http://sho.rt/admin/index.php
1933 * Check if a URL protocol is allowed
1935 * Checks a URL against a list of whitelisted protocols. Protocols must be defined with
1936 * their complete scheme name, ie 'stuff:' or 'stuff://' (for instance, 'mailto:' is a valid
1937 * protocol, 'mailto://' isn't, and 'http:' with no double slashed isn't either
1941 * @param string $url URL to be check
1942 * @param array $protocols Optional. Array of protocols, defaults to global $yourls_allowedprotocols
1943 * @return boolean true if protocol allowed, false otherwise
1945 function yourls_is_allowed_protocol( $url, $protocols = array() ) {
1946 if( ! $protocols ) {
1947 global $yourls_allowedprotocols;
1948 $protocols = $yourls_allowedprotocols;
1951 $protocol = yourls_get_protocol( $url );
1952 return yourls_apply_filter( 'is_allowed_protocol', in_array( $protocol, $protocols ), $url, $protocols );
1956 * Get protocol from a URL (eg mailto:, http:// ...)
1960 * @param string $url URL to be check
1961 * @return string Protocol, with slash slash if applicable. Empty string if no protocol
1963 function yourls_get_protocol( $url ) {
1964 preg_match( '!^[a-zA-Z0-9\+\.-]+:(//)?!', $url, $matches );
1966 http://en.wikipedia.org/wiki/URI_scheme#Generic_syntax
1967 The scheme name consists of a sequence of characters beginning with a letter and followed by any
1968 combination of letters, digits, plus ("+"), period ("."), or hyphen ("-"). Although schemes are
1969 case-insensitive, the canonical form is lowercase and documents that specify schemes must do so
1970 with lowercase letters. It is followed by a colon (":").
1972 $protocol = ( isset( $matches[0] ) ? $matches[0] : '' );
1973 return yourls_apply_filter( 'get_protocol', $protocol, $url );
1977 * Get relative URL (eg 'abc' from 'http://sho.rt/abc')
1979 * Treat indifferently http & https. If a URL isn't relative to the YOURLS install, return it as is
1980 * or return empty string if $strict is true
1983 * @param string $url URL to relativize
1984 * @param bool $strict if true and if URL isn't relative to YOURLS install, return empty string
1985 * @return string URL
1987 function yourls_get_relative_url( $url, $strict = true ) {
1988 $url = yourls_sanitize_url( $url );
1990 // Remove protocols to make it easier
1991 $noproto_url = str_replace( 'https:', 'http:', $url );
1992 $noproto_site = str_replace( 'https:', 'http:', YOURLS_SITE );
1994 // Trim URL from YOURLS root URL : if no modification made, URL wasn't relative
1995 $_url = str_replace( $noproto_site . '/', '', $noproto_url );
1996 if( $_url == $noproto_url )
1997 $_url = ( $strict ? '' : $url );
1999 return yourls_apply_filter( 'get_relative_url', $_url, $url );
2003 * Marks a function as deprecated and informs when it has been used. Stolen from WP.
2005 * There is a hook deprecated_function that will be called that can be used
2006 * to get the backtrace up to what file and function called the deprecated
2009 * The current behavior is to trigger a user error if YOURLS_DEBUG is true.
2011 * This function is to be used in every function that is deprecated.
2014 * @uses yourls_do_action() Calls 'deprecated_function' and passes the function name, what to use instead,
2015 * and the version the function was deprecated in.
2016 * @uses yourls_apply_filters() Calls 'deprecated_function_trigger_error' and expects boolean value of true to do
2017 * trigger or false to not trigger error.
2019 * @param string $function The function that was called
2020 * @param string $version The version of WordPress that deprecated the function
2021 * @param string $replacement Optional. The function that should have been called
2023 function yourls_deprecated_function( $function, $version, $replacement = null ) {
2025 yourls_do_action( 'deprecated_function', $function, $replacement, $version );
2027 // Allow plugin to filter the output error trigger
2028 if ( YOURLS_DEBUG && yourls_apply_filters( 'deprecated_function_trigger_error', true ) ) {
2029 if ( ! is_null( $replacement ) )
2030 trigger_error( sprintf( yourls__('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
2032 trigger_error( sprintf( yourls__('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
2037 * Return the value if not an empty string
2039 * Used with array_filter(), to remove empty keys but not keys with value 0 or false
2042 * @param mixed $val Value to test against ''
2043 * @return bool True if not an empty string
2045 function yourls_return_if_not_empty_string( $val ) {
2046 return( $val !== '' );