fields["$colname"]
4) No error handling yet - could use ADOConnection->raiseErrorFn
5) It used to be faster then PEAR/DB at the beginning of 2002.
Now at August 2002 PEAR/DB with our own page cache added, performance is comparable.
*/
//require_once('DB.php');
require_once('lib/WikiDB/backend.php');
//require_once('lib/FileFinder.php');
//require_once('lib/ErrorManager.php');
// Error handling - calls trigger_error. NB - does not close the connection. Does it need to?
include_once('lib/WikiDB/adodb/adodb-errorhandler.inc.php');
// include the main adodb file
require_once('lib/WikiDB/adodb/adodb.inc.php');
class WikiDB_backend_ADODB
extends WikiDB_backend
{
function WikiDB_backend_ADODB ($dbparams) {
// Find and include PEAR's DB.php.
//$pearFinder = new PearFileFinder;
//$pearFinder->includeOnce('DB.php');
// Install filter to handle bogus error notices from buggy DB.php's.
// global $ErrorManager;
// $ErrorManager->pushErrorHandler(new WikiMethodCb($this, '_pear_notice_filter'));
// Open connection to database
// $this->_dsn = $dbparams['dsn'];
/* $dboptions = array('persistent' => true,
'debug' => 2);
$this->_dbh = DB::connect($this->_dsn, $dboptions);
$dbh = &$this->_dbh;
if (DB::isError($dbh)) {
trigger_error(sprintf("Can't connect to database: %s",
$this->_pear_error_message($dbh)),
E_USER_ERROR);
}
$dbh->setErrorHandling(PEAR_ERROR_CALLBACK,
array($this, '_pear_error_callback'));
$dbh->setFetchMode(ADODB_FETCH_ASSOC);
*/
$parsed = parseDSN($dbparams['dsn']);
$this->_dbh = &ADONewConnection($parsed['phptype']); // Probably only MySql works just now
$conn = $this->_dbh->PConnect($parsed['hostspec'],$parsed['username'],
$parsed['password'], $parsed['database']);
// Error handling not needed here -all dealt with by adodb-errorhandler.inc.php
/* if ($conn === false) {
trigger_error(sprintf("Can't connect to database: %s",
$this->_pear_error_message($conn)),
E_USER_ERROR);
}
*/
// Uncomment the following line to enable debugging output (not very pretty!)
// $this->_dbh->debug = true;
$GLOBALS['ADODB_FETCH_MODE'] = ADODB_FETCH_ASSOC;
// The next line should speed up queries if enabled, but:
// 1) It only works with PHP >= 4.0.6; and
// 2) At the moment, I haven't figured out why the wrong results are returned'
// $GLOBALS['ADODB_COUNTRECS'] = false;
$prefix = isset($dbparams['prefix']) ? $dbparams['prefix'] : '';
$this->_table_names
= array('page_tbl' => $prefix . 'page',
'version_tbl' => $prefix . 'version',
'link_tbl' => $prefix . 'link',
'recent_tbl' => $prefix . 'recent',
'nonempty_tbl' => $prefix . 'nonempty');
$this->_expressions
= array('maxmajor' => "MAX(CASE WHEN minor_edit=0 THEN version END)",
'maxminor' => "MAX(CASE WHEN minor_edit<>0 THEN version END)",
'maxversion' => "MAX(version)");
$this->_lock_count = 0;
}
/**
* Close database connection.
*/
function close () {
if (!$this->_dbh)
return;
if ($this->_lock_count) {
trigger_error( "WARNING: database still locked " . '(lock_count = $this->_lock_count)' . "\n
",
E_USER_WARNING);
}
// $this->_dbh->setErrorHandling(PEAR_ERROR_PRINT); // prevent recursive loops.
$this->unlock('force');
$this->_dbh->close();
$this->_dbh = false;
}
/*
* Test fast wikipage.
*/
function is_wiki_page($pagename) {
$dbh = &$this->_dbh;
extract($this->_table_names);
$rs = $dbh->Execute(sprintf("SELECT $page_tbl.id AS id"
. " FROM $nonempty_tbl, $page_tbl"
. " WHERE $nonempty_tbl.id=$page_tbl.id"
. " AND pagename=%s",
$dbh->qstr($pagename)));
if (!$rs->EOF) {
$result = $rs->fields["id"];
$rs->Close();
return $result;
} else {
$rs->Close();
return false;
}
}
function get_all_pagenames() {
$dbh = &$this->_dbh;
extract($this->_table_names);
//return $dbh->getCol("SELECT pagename"
// . " FROM $nonempty_tbl, $page_tbl"
// . " WHERE $nonempty_tbl.id=$page_tbl.id");
//Original code (above) return the column in an indexed array - 0 based
//So, hopefully, does this
$result = $dbh->Execute("SELECT pagename"
. " FROM $nonempty_tbl, $page_tbl"
. " WHERE $nonempty_tbl.id=$page_tbl.id");
return $result->GetArray();
}
/**
* Read page information from database.
*/
function get_pagedata($pagename) {
$dbh = &$this->_dbh;
$page_tbl = $this->_table_names['page_tbl'];
//trigger_error("GET_PAGEDATA $pagename", E_USER_NOTICE);
$result = $dbh->GetRow(sprintf("SELECT * FROM $page_tbl WHERE pagename=%s",
$dbh->qstr($pagename)));
if (!$result)
return false;
return $this->_extract_page_data($result);
}
function _extract_page_data(&$query_result) {
extract($query_result);
$data = empty($pagedata) ? array() : unserialize($pagedata);
$data['hits'] = $hits; // Where do we get the hits from here?
return $data;
}
function update_pagedata($pagename, $newdata) {
$dbh = &$this->_dbh;
$page_tbl = $this->_table_names['page_tbl'];
// Hits is the only thing we can update in a fast manner.
if (count($newdata) == 1 && isset($newdata['hits'])) {
// Note that this will fail silently if the page does not
// have a record in the page table. Since it's just the
// hit count, who cares?
$dbh->Execute(sprintf("UPDATE $page_tbl SET hits=%d WHERE pagename=%s",
$newdata['hits'], $dbh->qstr($pagename)));
return;
}
$this->lock();
$data = $this->get_pagedata($pagename);
if (!$data) {
$data = array();
$this->_get_pageid($pagename, true); // Creates page record
}
@$hits = (int)$data['hits'];
unset($data['hits']);
foreach ($newdata as $key => $val) {
if ($key == 'hits')
$hits = (int)$val;
else if (empty($val))
unset($data[$key]);
else
$data[$key] = $val;
}
$dbh->Execute(sprintf("UPDATE $page_tbl"
. " SET hits=%d, pagedata=%s"
. " WHERE pagename=%s",
$hits,
$dbh->qstr(serialize($data)),
$dbh->qstr($pagename)));
$this->unlock();
}
function _get_pageid($pagename, $create_if_missing = false) {
$dbh = &$this->_dbh;
$page_tbl = $this->_table_names['page_tbl'];
$query = sprintf("SELECT id FROM $page_tbl WHERE pagename=%s",
$dbh->qstr($pagename));
if (!$create_if_missing) {
$rs = $dbh->Execute($query);
return $rs->fields['id'];
}
$this->lock();
$rs = $dbh->Execute($query);
$id = $rs->fields['id'];
if (empty($id)) {
// kludge necessary because an assoc array is returned with a reserved name as the key
$rs = $dbh->Execute("SELECT MAX(id) AS M FROM $page_tbl");
$id = $rs->fields['M'] + 1;
$dbh->Execute(sprintf("INSERT INTO $page_tbl"
. " (id,pagename,hits)"
. " VALUES (%d,%s,0)",
$id, $dbh->qstr($pagename)));
}
$this->unlock();
return $id;
}
function get_latest_version($pagename) {
$dbh = &$this->_dbh;
extract($this->_table_names);
$rs = $dbh->Execute(sprintf("SELECT latestversion"
. " FROM $page_tbl, $recent_tbl"
. " WHERE $page_tbl.id=$recent_tbl.id"
. " AND pagename=%s",
$dbh->qstr($pagename)));
return (int)$rs->fields['latestversion'];
}
function get_previous_version($pagename, $version) {
$dbh = &$this->_dbh;
extract($this->_table_names);
// Use SELECTLIMIT for maximum portability
$rs = $dbh->SelectLimit(sprintf("SELECT version"
. " FROM $version_tbl, $page_tbl"
. " WHERE $version_tbl.id=$page_tbl.id"
. " AND pagename=%s"
. " AND version < %d"
. " ORDER BY version DESC"
,$dbh->qstr($pagename),
$version),
1);
return (int)$rs->fields['version'];
}
/**
* Get version data.
*
* @param $version int Which version to get.
*
* @return hash The version data, or false if specified version does not
* exist.
*/
function get_versiondata($pagename, $version, $want_content = false) {
$dbh = &$this->_dbh;
extract($this->_table_names);
assert(!empty($pagename));
assert($version > 0);
//trigger_error("GET_REVISION $pagename $version $want_content", E_USER_NOTICE);
// FIXME: optimization: sometimes don't get page data?
if ($want_content) {
$fields = "*";
} else {
$fields = ("$page_tbl.*,"
. "mtime,minor_edit,versiondata,"
. "content<>'' AS have_content");
}
// removed ref to FETCH_MODE in next line
$result = $dbh->GetRow(sprintf("SELECT $fields"
. " FROM $page_tbl, $version_tbl"
. " WHERE $page_tbl.id=$version_tbl.id"
. " AND pagename=%s"
. " AND version=%d",
$dbh->qstr($pagename), $version));
return $this->_extract_version_data($result);
}
function _extract_version_data(&$query_result) {
if (!$query_result)
return false;
extract($query_result);
$data = empty($versiondata) ? array() : unserialize($versiondata);
$data['mtime'] = $mtime;
$data['is_minor_edit'] = !empty($minor_edit);
if (isset($content))
$data['%content'] = $content;
elseif ($have_content)
$data['%content'] = true;
else
$data['%content'] = '';
// FIXME: this is ugly.
if (isset($pagename)) {
// Query also includes page data.
// We might as well send that back too...
$data['%pagedata'] = $this->_extract_page_data($query_result);
}
return $data;
}
/**
* Create a new revision of a page.
*/
function set_versiondata($pagename, $version, $data) {
$dbh = &$this->_dbh;
$version_tbl = $this->_table_names['version_tbl'];
$minor_edit = (int) !empty($data['is_minor_edit']);
unset($data['is_minor_edit']);
$mtime = (int)$data['mtime'];
unset($data['mtime']);
assert(!empty($mtime));
@$content = (string) $data['%content'];
unset($data['%content']);
unset($data['%pagedata']);
$this->lock();
$id = $this->_get_pageid($pagename, true);
// FIXME: optimize: mysql can do this with one REPLACE INTO (I think).
$dbh->Execute(sprintf("DELETE FROM $version_tbl"
. " WHERE id=%d AND version=%d",
$id, $version));
$dbh->Execute(sprintf("INSERT INTO $version_tbl"
. " (id,version,mtime,minor_edit,content,versiondata)"
. " VALUES(%d,%d,%d,%d,%s,%s)",
$id, $version, $mtime, $minor_edit,
$dbh->qstr($content),
$dbh->qstr(serialize($data))));
$this->_update_recent_table($id);
$this->_update_nonempty_table($id);
$this->unlock();
}
/**
* Delete an old revision of a page.
*/
function delete_versiondata($pagename, $version) {
$dbh = &$this->_dbh;
extract($this->_table_names);
$this->lock();
if ( ($id = $this->_get_pageid($pagename)) ) {
$dbh->Execute("DELETE FROM $version_tbl"
. " WHERE id=$id AND version=$version");
$this->_update_recent_table($id);
// This shouldn't be needed (as long as the latestversion
// never gets deleted.) But, let's be safe.
$this->_update_nonempty_table($id);
}
$this->unlock();
}
/**
* Delete page from the database.
*/
function delete_page($pagename) {
$dbh = &$this->_dbh;
extract($this->_table_names);
$this->lock();
if ( ($id = $this->_get_pageid($pagename, false)) ) {
$dbh->Execute("DELETE FROM $version_tbl WHERE id=$id");
$dbh->Execute("DELETE FROM $recent_tbl WHERE id=$id");
$dbh->Execute("DELETE FROM $nonempty_tbl WHERE id=$id");
$dbh->Execute("DELETE FROM $link_tbl WHERE linkfrom=$id");
$rs = $dbh->Execute("SELECT COUNT(*) AS C FROM $link_tbl WHERE linkto=$id");
$nlinks = $rs->fields['C'];
if ($nlinks) {
// We're still in the link table (dangling link) so we can't delete this
// altogether.
$dbh->Execute("UPDATE $page_tbl SET hits=0, pagedata='' WHERE id=$id");
}
else {
$dbh->Execute("DELETE FROM $page_tbl WHERE id=$id");
}
$this->_update_recent_table();
$this->_update_nonempty_table();
}
$this->unlock();
}
// The only thing we might be interested in updating which we can
// do fast in the flags (minor_edit). I think the default
// update_versiondata will work fine...
//function update_versiondata($pagename, $version, $data) {
//}
function set_links($pagename, $links) {
// Update link table.
// FIXME: optimize: mysql can do this all in one big INSERT.
$dbh = &$this->_dbh;
extract($this->_table_names);
$this->lock();
$pageid = $this->_get_pageid($pagename, true);
$dbh->Execute("DELETE FROM $link_tbl WHERE linkfrom=$pageid");
if ($links) {
foreach($links as $link) {
if (isset($linkseen[$link]))
continue;
$linkseen[$link] = true;
$linkid = $this->_get_pageid($link, true);
$dbh->Execute("INSERT INTO $link_tbl (linkfrom, linkto)"
. " VALUES ($pageid, $linkid)");
}
}
$this->unlock();
}
/**
* Find pages which link to or are linked from a page.
*/
function get_links($pagename, $reversed = true) {
$dbh = &$this->_dbh;
extract($this->_table_names);
if ($reversed)
list($have,$want) = array('linkee', 'linker');
else
list($have,$want) = array('linker', 'linkee');
$qpagename = $dbh->qstr($pagename);
// removed ref to FETCH_MODE in next line
$result = $dbh->Execute("SELECT $want.*"
. " FROM $link_tbl, $page_tbl AS linker, $page_tbl AS linkee"
. " WHERE linkfrom=linker.id AND linkto=linkee.id"
. " AND $have.pagename=$qpagename"
//. " GROUP BY $want.id"
. " ORDER BY $want.pagename");
return new WikiDB_backend_ADODB_iter($this, $result);
}
function get_all_pages($include_deleted=false,$orderby='pagename') {
$dbh = &$this->_dbh;
extract($this->_table_names);
if (substr($orderby,0,5) == 'mtime') {
//$orderby = $version_tbl . '.' . $orderby;
if ($include_deleted) {
$result = $dbh->Execute("SELECT * FROM $page_tbl, $recent_tbl, $version_tbl"
. " WHERE $page_tbl.id=$recent_tbl.id"
. " AND $page_tbl.id=$version_tbl.id AND latestversion=version"
. " ORDER BY $orderby");
}
else {
$result = $dbh->Execute("SELECT $page_tbl.*"
. " FROM $nonempty_tbl, $page_tbl, $recent_tbl, $version_tbl"
. " WHERE $nonempty_tbl.id=$page_tbl.id"
. " AND $page_tbl.id=$recent_tbl.id"
. " AND $page_tbl.id=$version_tbl.id AND latestversion=version"
. " ORDER BY $orderby");
}
} else {
if ($include_deleted) {
$result = $dbh->Execute("SELECT * FROM $page_tbl ORDER BY $orderby");
} else {
$result = $dbh->Execute("SELECT $page_tbl.*"
. " FROM $nonempty_tbl, $page_tbl"
. " WHERE $nonempty_tbl.id=$page_tbl.id"
. " ORDER BY $orderby");
}
}
return new WikiDB_backend_ADODB_iter($this, $result);
}
/**
* Title search.
*/
function text_search($search = '', $fullsearch = false) {
$dbh = &$this->_dbh;
extract($this->_table_names);
$table = "$nonempty_tbl, $page_tbl";
$join_clause = "$nonempty_tbl.id=$page_tbl.id";
$fields = "$page_tbl.*";
$callback = new WikiMethodCb($this, '_sql_match_clause');
if ($fullsearch) {
$table .= ", $recent_tbl";
$join_clause .= " AND $page_tbl.id=$recent_tbl.id";
$table .= ", $version_tbl";
$join_clause .= " AND $page_tbl.id=$version_tbl.id AND latestversion=version";
$fields .= ",$version_tbl.*";
$callback = new WikiMethodCb($this, '_fullsearch_sql_match_clause');
}
$search_clause = $search->makeSqlClause($callback);
$result = $dbh->Execute("SELECT $fields FROM $table"
. " WHERE $join_clause"
. " AND ($search_clause)"
. " ORDER BY pagename");
return new WikiDB_backend_ADODB_iter($this, $result);
}
function _sql_match_clause($word) {
//not sure if we need this. ADODB may do it for us
$word = preg_replace('/(?=[%_\\\\])/', "\\", $word);
// (we need it for at least % and _ --- they're the wildcard characters
// for the LIKE operator, and we need to quote them if we're searching
// for literal '%'s or '_'s. --- I'm not sure about \, but it seems to
// work as is.
$word = $this->_dbh->qstr("%$word%");
return "LOWER(pagename) LIKE $word";
}
function _fullsearch_sql_match_clause($word) {
$word = preg_replace('/(?=[%_\\\\])/', "\\", $word); //not sure if we need this
// (see above)
$word = $this->_dbh->qstr("%$word%");
return "LOWER(pagename) LIKE $word OR content LIKE $word";
}
/**
* Find highest or lowest hit counts.
*/
function most_popular($limit) {
$dbh = &$this->_dbh;
extract($this->_table_names);
$order = "DESC";
if ($limit < 0){
$order = "ASC";
$limit = -$limit;
}
$limit = $limit ? $limit : 1;
$result = $dbh->SelectLimit("SELECT $page_tbl.*"
. " FROM $nonempty_tbl, $page_tbl"
. " WHERE $nonempty_tbl.id=$page_tbl.id"
. " ORDER BY hits $order"
, $limit);
return new WikiDB_backend_ADODB_iter($this, $result);
}
/**
* Find recent changes.
*/
function most_recent($params) {
$limit = 0;
$since = 0;
$include_minor_revisions = false;
$exclude_major_revisions = false;
$include_all_revisions = false;
extract($params);
$dbh = &$this->_dbh;
extract($this->_table_names);
$pick = array();
if ($since)
$pick[] = "mtime >= $since";
if ($include_all_revisions) {
// Include all revisions of each page.
$table = "$page_tbl, $version_tbl";
$join_clause = "$page_tbl.id=$version_tbl.id";
if ($exclude_major_revisions) {
// Include only minor revisions
$pick[] = "minor_edit <> 0";
}
elseif (!$include_minor_revisions) {
// Include only major revisions
$pick[] = "minor_edit = 0";
}
}
else {
$table = "$page_tbl, $recent_tbl";
$join_clause = "$page_tbl.id=$recent_tbl.id";
$table .= ", $version_tbl";
$join_clause .= " AND $version_tbl.id=$page_tbl.id";
if ($exclude_major_revisions) {
// Include only most recent minor revision
$pick[] = 'version=latestminor';
}
elseif (!$include_minor_revisions) {
// Include only most recent major revision
$pick[] = 'version=latestmajor';
}
else {
// Include only the latest revision (whether major or minor).
$pick[] ='version=latestversion';
}
}
$order = "DESC";
if($limit < 0){
$order = "ASC";
$limit = -$limit;
}
$limit = $limit ? $limit : 1;
$where_clause = $join_clause;
if ($pick)
$where_clause .= " AND " . join(" AND ", $pick);
// FIXME: use SQL_BUFFER_RESULT for mysql?
// Use SELECTLIMIT for portability
$result = $dbh->SelectLimit("SELECT $page_tbl.*,$version_tbl.*"
. " FROM $table"
. " WHERE $where_clause"
. " ORDER BY mtime $order",
$limit);
return new WikiDB_backend_ADODB_iter($this, $result);
}
/**
* Rename page in the database.
*/
function rename_page($pagename, $to) {
$dbh = &$this->_dbh;
extract($this->_table_names);
$this->lock();
if ( ($id = $this->_get_pageid($pagename, false)) ) {
$dbh->query(sprintf("UPDATE $page_tbl SET pagename='%s' WHERE id=$id",
$dbh->qstr($to)));
}
$this->unlock();
return $id;
}
function _update_recent_table($pageid = false) {
$dbh = &$this->_dbh;
extract($this->_table_names);
extract($this->_expressions);
$pageid = (int)$pageid;
$this->lock();
$dbh->Execute("DELETE FROM $recent_tbl"
. ( $pageid ? " WHERE id=$pageid" : ""));
$dbh->Execute( "INSERT INTO $recent_tbl"
. " (id, latestversion, latestmajor, latestminor)"
. " SELECT id, $maxversion, $maxmajor, $maxminor"
. " FROM $version_tbl"
. ( $pageid ? " WHERE id=$pageid" : "")
. " GROUP BY id" );
$this->unlock();
}
function _update_nonempty_table($pageid = false) {
$dbh = &$this->_dbh;
extract($this->_table_names);
$pageid = (int)$pageid;
$this->lock();
$dbh->Execute("DELETE FROM $nonempty_tbl"
. ( $pageid ? " WHERE id=$pageid" : ""));
$dbh->Execute("INSERT INTO $nonempty_tbl (id)"
. " SELECT $recent_tbl.id"
. " FROM $recent_tbl, $version_tbl"
. " WHERE $recent_tbl.id=$version_tbl.id"
. " AND version=latestversion"
. " AND content<>''"
. ( $pageid ? " AND $recent_tbl.id=$pageid" : ""));
$this->unlock();
}
/**
* Grab a write lock on the tables in the SQL database.
*
* Calls can be nested. The tables won't be unlocked until
* _unlock_database() is called as many times as _lock_database().
*
* @access protected
*/
function lock($write_lock = true) {
if ($this->_lock_count++ == 0)
$this->_lock_tables($write_lock);
}
/**
* Actually lock the required tables.
*/
function _lock_tables($write_lock) {
trigger_error("virtual", E_USER_ERROR);
}
/**
* Release a write lock on the tables in the SQL database.
*
* @access protected
*
* @param $force boolean Unlock even if not every call to lock() has been matched
* by a call to unlock().
*
* @see _lock_database
*/
function unlock($force = false) {
if ($this->_lock_count == 0)
return;
if (--$this->_lock_count <= 0 || $force) {
$this->_unlock_tables();
$this->_lock_count = 0;
}
}
/**
* Actually unlock the required tables.
*/
function _unlock_tables($write_lock) {
trigger_error("virtual", E_USER_ERROR);
}
/**
* Callback for PEAR (DB) errors.
*
* @access protected
*
* @param A PEAR_error object.
*/
/* function _pear_error_callback($error) {
if ($this->_is_false_error($error))
return;
$this->_dbh->setErrorHandling(PEAR_ERROR_PRINT); // prevent recursive loops.
$this->close();
trigger_error($this->_pear_error_message($error), E_USER_ERROR);
}
*/
/**
* Detect false errors messages from PEAR DB.
*
* The version of PEAR DB which ships with PHP 4.0.6 has a bug in that
* it doesn't recognize "LOCK" and "UNLOCK" as SQL commands which don't
* return any data. (So when a "LOCK" command doesn't return any data,
* DB reports it as an error, when in fact, it's not.)
*
* @access private
* @return bool True iff error is not really an error.
*/
/* function _is_false_error($error) {
if ($error->getCode() != DB_ERROR)
return false;
$query = $this->_dbh->last_query;
if (! preg_match('/^\s*"?(INSERT|UPDATE|DELETE|REPLACE|CREATE'
. '|DROP|ALTER|GRANT|REVOKE|LOCK|UNLOCK)\s/', $query)) {
// Last query was not of the sort which doesn't return any data.
//" <--kludge for brain-dead syntax coloring
return false;
}
if (! in_array('ismanip', get_class_methods('DB'))) {
// Pear shipped with PHP 4.0.4pl1 (and before, presumably)
// does not have the DB::isManip method.
return true;
}
if (DB::isManip($query)) {
// If Pear thinks it's an isManip then it wouldn't have thrown
// the error we're testing for....
return false;
}
return true;
}
*/
/* function _pear_error_message($error) {
$class = get_class($this);
$message = "$class: fatal database error\n"
. "\t" . $error->getMessage() . "\n"
. "\t(" . $error->getDebugInfo() . ")\n";
// Prevent password from being exposed during a connection error
$safe_dsn = preg_replace('| ( :// .*? ) : .* (?=@) |xs',
'\\1:XXXXXXXX', $this->_dsn);
return str_replace($this->_dsn, $safe_dsn, $message);
}
*/
/**
* Filter PHP errors notices from PEAR DB code.
*
* The PEAR DB code which ships with PHP 4.0.6 produces spurious
* errors and notices. This is an error callback (for use with
* ErrorManager which will filter out those spurious messages.)
* @see _is_false_error, ErrorManager
* @access private
*/
/* function _pear_notice_filter($err) {
return ( $err->isNotice()
&& preg_match('|DB[/\\\\]common.php$|', $err->errfile)
&& $err->errline == 126
&& preg_match('/Undefined offset: +0\b/', $err->errstr) );
}
*/
};
class WikiDB_backend_ADODB_iter
extends WikiDB_backend_iterator
{
function WikiDB_backend_ADODB_iter(&$backend, &$query_result) {
// ADODB equivalent of this? May not matter, since we should never get here
/* if (DB::isError($query_result)) {
// This shouldn't happen, I thought.
$backend->_pear_error_callback($query_result);
}
*/
$this->_backend = &$backend;
$this->_result = $query_result;
}
function next() {
$result = &$this->_result;
if (!$result || $result->EOF) {
$this->free();
return false;
}
// $record = $this->_result->fetchRow(DB_FETCHMODE_ASSOC);
$record = $result->fields;
$result->MoveNext();
$backend = &$this->_backend;
$pagedata = $backend->_extract_page_data($record);
$rec = array('pagename' => $record['pagename'],
'pagedata' => $pagedata);
if (!empty($record['version'])) {
$rec['versiondata'] = $backend->_extract_version_data($record);
$rec['version'] = $record['version'];
}
return $rec;
}
function free () {
if ($this->_result) {
// $this->_result->free();
$this->_result->Close();
$this->_result = false;
}
}
}
// Following function taken from adodb-pear.inc.php.
// Eventually, change index.php to provide the relevant information
// directly?
/**
* Parse a data source name
*
* @param $dsn string Data Source Name to be parsed
*
* @return array an associative array with the following keys:
*
* phptype: Database backend used in PHP (mysql, odbc etc.)
* dbsyntax: Database used with regards to SQL syntax etc.
* protocol: Communication protocol to use (tcp, unix etc.)
* hostspec: Host specification (hostname[:port])
* database: Database to use on the DBMS server
* username: User name for login
* password: Password for login
*
* The format of the supplied DSN is in its fullest form:
*
* phptype(dbsyntax)://username:password@protocol+hostspec/database
*
* Most variations are allowed:
*
* phptype://username:password@protocol+hostspec:110//usr/db_file.db
* phptype://username:password@hostspec/database_name
* phptype://username:password@hostspec
* phptype://username@hostspec
* phptype://hostspec/database
* phptype://hostspec
* phptype(dbsyntax)
* phptype
*
* @author Tomas V.V.Cox
*/
function parseDSN($dsn) {
if (is_array($dsn)) {
return $dsn;
}
$parsed = array(
'phptype' => false,
'dbsyntax' => false,
'protocol' => false,
'hostspec' => false,
'database' => false,
'username' => false,
'password' => false
);
// Find phptype and dbsyntax
if (($pos = strpos($dsn, '://')) !== false) {
$str = substr($dsn, 0, $pos);
$dsn = substr($dsn, $pos + 3);
} else {
$str = $dsn;
$dsn = NULL;
}
// Get phptype and dbsyntax
// $str => phptype(dbsyntax)
if (preg_match('|^(.+?)\((.*?)\)$|', $str, $arr)) {
$parsed['phptype'] = $arr[1];
$parsed['dbsyntax'] = (empty($arr[2])) ? $arr[1] : $arr[2];
} else {
$parsed['phptype'] = $str;
$parsed['dbsyntax'] = $str;
}
if (empty($dsn)) {
return $parsed;
}
// Get (if found): username and password
// $dsn => username:password@protocol+hostspec/database
if (($at = strpos($dsn,'@')) !== false) {
$str = substr($dsn, 0, $at);
$dsn = substr($dsn, $at + 1);
if (($pos = strpos($str, ':')) !== false) {
$parsed['username'] = urldecode(substr($str, 0, $pos));
$parsed['password'] = urldecode(substr($str, $pos + 1));
} else {
$parsed['username'] = urldecode($str);
}
}
// Find protocol and hostspec
// $dsn => protocol+hostspec/database
if (($pos=strpos($dsn, '/')) !== false) {
$str = substr($dsn, 0, $pos);
$dsn = substr($dsn, $pos + 1);
} else {
$str = $dsn;
$dsn = NULL;
}
// Get protocol + hostspec
// $str => protocol+hostspec
if (($pos=strpos($str, '+')) !== false) {
$parsed['protocol'] = substr($str, 0, $pos);
$parsed['hostspec'] = urldecode(substr($str, $pos + 1));
} else {
$parsed['hostspec'] = urldecode($str);
}
// Get dabase if any
// $dsn => database
if (!empty($dsn)) {
$parsed['database'] = $dsn;
}
return $parsed;
}
// (c-file-style: "gnu")
// Local Variables:
// mode: php
// tab-width: 8
// c-basic-offset: 4
// c-hanging-comment-ender-p: nil
// indent-tabs-mode: nil
// End:
?>