Issues in pageutils.php (master) - Issues in master - splitbrain/dokuwiki - Measure and Improve Code Quality continuously with Scrutinizer

Issues (847)

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Cross-Site Scripting

Cross-Site Scripting enables an attacker to inject code into the response of a web-request that is viewed by other users. It can for example be used to bypass access controls, or even to take over other users' accounts.

File Exposure

File Exposure allows an attacker to gain access to local files that he should not be able to access. These files can for example include database credentials, or other configuration files.

File Manipulation

File Manipulation enables an attacker to write custom data to files. This potentially leads to injection of arbitrary code on the server.

Object Injection

Object Injection enables an attacker to inject an object into PHP code, and can lead to arbitrary code execution, file exposure, or file manipulation attacks.

Code Injection

Code Injection enables an attacker to execute arbitrary code on the server.

Response Splitting

Response Splitting can be used to send arbitrary responses.

File Inclusion

File Inclusion enables an attacker to inject custom files into PHP's file loading mechanism, either explicitly passed to include, or for example via PHP's auto-loading mechanism.

Command Injection

Command Injection enables an attacker to inject a shell command that is execute with the privileges of the web-server. This can be used to expose sensitive data, or gain access of your server.

SQL Injection

SQL Injection enables an attacker to execute arbitrary SQL code on your database server gaining access to user data, or manipulating user data.

XPath Injection

XPath Injection enables an attacker to modify the parts of XML document that are read. If that XML document is for example used for authentication, this can lead to further vulnerabilities similar to SQL Injection.

LDAP Injection

LDAP Injection enables an attacker to inject LDAP statements potentially granting permission to run unauthorized queries, or modify content inside the LDAP tree.

Header Injection

Other Vulnerability

This category comprises other attack vectors such as manipulating the PHP runtime, loading custom extensions, freezing the runtime, or similar.

Regex Injection

Regex Injection enables an attacker to execute arbitrary code in your PHP process.

XML Injection

XML Injection enables an attacker to read files on your local filesystem including configuration files, or can be abused to freeze your web-server process.

Variable Injection

Variable Injection enables an attacker to overwrite program variables with custom data, and can lead to further vulnerabilities.

Unfortunately, the security analysis is currently not available for your project. If you are a non-commercial open-source project, please contact support to gain access.

inc/pageutils.php (4 issues)

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<?php
/**
 * Utilities for handling pagenames
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Andreas Gohr <[email protected]>
 * @todo       Combine similar functions like {wiki,media,meta}FN()
 */

use dokuwiki\ChangeLog\MediaChangeLog;
.
|-- OtherDir
|   |-- Bar.php
|   `-- Foo.php
`-- SomeDir
    `-- Foo.php
use dokuwiki\ChangeLog\PageChangeLog;
.
|-- OtherDir
|   |-- Bar.php
|   `-- Foo.php
`-- SomeDir
    `-- Foo.php

/**
 * Fetch the an ID from request
 *
 * Uses either standard $_REQUEST variable or extracts it from
 * the full request URI when userewrite is set to 2
 *
 * For $param='id' $conf['start'] is returned if no id was found.
 * If the second parameter is true (default) the ID is cleaned.
 *
 * @author Andreas Gohr <[email protected]>
 *
 * @param string $param  the $_REQUEST variable name, default 'id'
 * @param bool   $clean  if true, ID is cleaned
 * @return string
 */
function getID($param='id',$clean=true){
    /** @var Input $INPUT */
    global $INPUT;
    global $conf;
    global $ACT;

    $id = $INPUT->str($param);

    //construct page id from request URI
    if(empty($id) && $conf['userewrite'] == 2){
        $request = $INPUT->server->str('REQUEST_URI');
        $script = '';

        //get the script URL
        if($conf['basedir']){
            $relpath = '';
            if($param != 'id') {
                $relpath = 'lib/exe/';
            }
            $script = $conf['basedir'] . $relpath .
                \dokuwiki\Utf8\PhpString::basename($INPUT->server->str('SCRIPT_FILENAME'));

        }elseif($INPUT->server->str('PATH_INFO')){
            $request = $INPUT->server->str('PATH_INFO');
        }elseif($INPUT->server->str('SCRIPT_NAME')){
            $script = $INPUT->server->str('SCRIPT_NAME');
        }elseif($INPUT->server->str('DOCUMENT_ROOT') && $INPUT->server->str('SCRIPT_FILENAME')){
            $script = preg_replace ('/^'.preg_quote($INPUT->server->str('DOCUMENT_ROOT'),'/').'/','',
                    $INPUT->server->str('SCRIPT_FILENAME'));
            $script = '/'.$script;
        }

        //clean script and request (fixes a windows problem)
        $script  = preg_replace('/\/\/+/','/',$script);
        $request = preg_replace('/\/\/+/','/',$request);

        //remove script URL and Querystring to gain the id
        if(preg_match('/^'.preg_quote($script,'/').'(.*)/',$request, $match)){
            $id = preg_replace ('/\?.*/','',$match[1]);
        }
        $id = urldecode($id);
        //strip leading slashes
        $id = preg_replace('!^/+!','',$id);
    }

    // Namespace autolinking from URL
    if(substr($id,-1) == ':' || ($conf['useslash'] && substr($id,-1) == '/')){
        if(page_exists($id.$conf['start'])){
            // start page inside namespace
            $id = $id.$conf['start'];
        }elseif(page_exists($id.noNS(cleanID($id)))){
            // page named like the NS inside the NS
            $id = $id.noNS(cleanID($id));
        }elseif(page_exists($id)){
            // page like namespace exists
            $id = substr($id,0,-1);
        }else{
            // fall back to default
            $id = $id.$conf['start'];
        }
        if (isset($ACT) && $ACT === 'show') {
            $urlParameters = $_GET;
            if (isset($urlParameters['id'])) {
                unset($urlParameters['id']);
            }
            send_redirect(wl($id, $urlParameters, true, '&'));
        }
    }
    if($clean) $id = cleanID($id);
    if($id === '' && $param=='id') $id = $conf['start'];

    return $id;
}

/**
 * Remove unwanted chars from ID
 *
 * Cleans a given ID to only use allowed characters. Accented characters are
 * converted to unaccented ones
 *
 * @author Andreas Gohr <[email protected]>
 *
 * @param  string  $raw_id    The pageid to clean
 * @param  boolean $ascii     Force ASCII
 * @return string cleaned id
 */
function cleanID($raw_id,$ascii=false){
    global $conf;
    static $sepcharpat = null;

    global $cache_cleanid;
    $cache = & $cache_cleanid;

    // check if it's already in the memory cache
    if (!$ascii && isset($cache[(string)$raw_id])) {
        return $cache[(string)$raw_id];
    }

    $sepchar = $conf['sepchar'];
    if($sepcharpat == null) // build string only once to save clock cycles
        $sepcharpat = '#\\'.$sepchar.'+#';

    $id = trim((string)$raw_id);
    $id = \dokuwiki\Utf8\PhpString::strtolower($id);

    //alternative namespace seperator
    if($conf['useslash']){
        $id = strtr($id,';/','::');
    }else{
        $id = strtr($id,';/',':'.$sepchar);
    }

    if($conf['deaccent'] == 2 || $ascii) $id = \dokuwiki\Utf8\Clean::romanize($id);
    if($conf['deaccent'] || $ascii) $id = \dokuwiki\Utf8\Clean::deaccent($id,-1);

    //remove specials
    $id = \dokuwiki\Utf8\Clean::stripspecials($id,$sepchar,'\*');

    if($ascii) $id = \dokuwiki\Utf8\Clean::strip($id);

    //clean up
    $id = preg_replace($sepcharpat,$sepchar,$id);
    $id = preg_replace('#:+#',':',$id);
    $id = trim($id,':._-');
    $id = preg_replace('#:[:\._\-]+#',':',$id);
    $id = preg_replace('#[:\._\-]+:#',':',$id);

    if (!$ascii) $cache[(string)$raw_id] = $id;
    return($id);
}

/**
 * Return namespacepart of a wiki ID
 *
 * @author Andreas Gohr <[email protected]>
 *
 * @param string $id
 * @return string|false the namespace part or false if the given ID has no namespace (root)
 */
function getNS($id){
    $pos = strrpos((string)$id,':');
    if($pos!==false){
        return substr((string)$id,0,$pos);
    }
    return false;
}

/**
 * Returns the ID without the namespace
 *
 * @author Andreas Gohr <[email protected]>
 *
 * @param string $id
 * @return string
 */
function noNS($id) {
    $pos = strrpos($id, ':');
    if ($pos!==false) {
        return substr($id, $pos+1);
    } else {
        return $id;
    }
}

/**
 * Returns the current namespace
 *
 * @author Nathan Fritz <[email protected]>
 *
 * @param string $id
 * @return string
 */
function curNS($id) {
    return noNS(getNS($id));

}

/**
 * Returns the ID without the namespace or current namespace for 'start' pages
 *
 * @author Nathan Fritz <[email protected]>
 *
 * @param string $id
 * @return string
 */
function noNSorNS($id) {
    global $conf;

    $p = noNS($id);
    if ($p === $conf['start'] || $p === false || $p === '') {
        $p = curNS($id);
        if ($p === false || $p === '') {
            return $conf['start'];
        }
    }
    return $p;
}

/**
 * Creates a XHTML valid linkid from a given headline title
 *
 * @param string  $title   The headline title
 * @param array|bool   $check   Existing IDs
 * @return string the title
 *
 * @author Andreas Gohr <[email protected]>
 */
function sectionID($title,&$check) {
    $title = str_replace(array(':','.'),'',cleanID($title));
    $new = ltrim($title,'0123456789_-');
    if(empty($new)){
        $title = 'section'.preg_replace('/[^0-9]+/','',$title); //keep numbers from headline
    }else{
        $title = $new;
    }

    if(is_array($check)){
        $suffix=0;
        $candidateTitle = $title;
        while(in_array($candidateTitle, $check)){
          $candidateTitle = $title . ++$suffix;
        }
        $check []= $candidateTitle;
        return $candidateTitle;
    } else {
      return $title;
    }
}

/**
 * Wiki page existence check
 *
 * parameters as for wikiFN
 *
 * @author Chris Smith <[email protected]>
 *
 * @param string $id page id
 * @param string|int $rev empty or revision timestamp
 * @param bool $clean flag indicating that $id should be cleaned (see wikiFN as well)
 * @param bool $date_at
 * @return bool exists?
 */
function page_exists($id,$rev='',$clean=true, $date_at=false) {
    if($rev !== '' && $date_at) {
        $pagelog = new PageChangeLog($id);
        $pagelog_rev = $pagelog->getLastRevisionAt($rev);
        if($pagelog_rev !== false)
            $rev = $pagelog_rev;
    }
    return file_exists(wikiFN($id,$rev,$clean));
}

/**
 * returns the full path to the datafile specified by ID and optional revision
 *
 * The filename is URL encoded to protect Unicode chars
 *
 * @param  $raw_id  string   id of wikipage
 * @param  $rev     int|string   page revision, empty string for current
 * @param  $clean   bool     flag indicating that $raw_id should be cleaned.  Only set to false
 *                           when $id is guaranteed to have been cleaned already.
 * @return string full path
 *
 * @author Andreas Gohr <[email protected]>
 */
function wikiFN($raw_id,$rev='',$clean=true){
    global $conf;

    global $cache_wikifn;
    $cache = & $cache_wikifn;

    $id = $raw_id;

    if ($clean) $id = cleanID($id);
    $id = str_replace(':','/',$id);

    if (isset($cache[$id]) && isset($cache[$id][$rev])) {
        return $cache[$id][$rev];
    }

    if(empty($rev)){
        $fn = $conf['datadir'].'/'.utf8_encodeFN($id).'.txt';
    }else{
        $fn = $conf['olddir'].'/'.utf8_encodeFN($id).'.'.$rev.'.txt';
        if($conf['compression']){
            //test for extensions here, we want to read both compressions
            if (file_exists($fn . '.gz')){
                $fn .= '.gz';
            }else if(file_exists($fn . '.bz2')){
                $fn .= '.bz2';
            }else{
                //file doesnt exist yet, so we take the configured extension
                $fn .= '.' . $conf['compression'];
            }
        }
    }

    if (!isset($cache[$id])) { $cache[$id] = array(); }
    $cache[$id][$rev] = $fn;
    return $fn;
}

/**
 * Returns the full path to the file for locking the page while editing.
 *
 * @author Ben Coburn <[email protected]>
 *
 * @param string $id page id
 * @return string full path
 */
function wikiLockFN($id) {
    global $conf;
    return $conf['lockdir'].'/'.md5(cleanID($id)).'.lock';
}


/**
 * returns the full path to the meta file specified by ID and extension
 *
 * @author Steven Danz <[email protected]>
 *
 * @param string $id   page id
 * @param string $ext  file extension
 * @return string full path
 */
function metaFN($id,$ext){
    global $conf;
    $id = cleanID($id);
    $id = str_replace(':','/',$id);
    $fn = $conf['metadir'].'/'.utf8_encodeFN($id).$ext;
    return $fn;
}

/**
 * returns the full path to the media's meta file specified by ID and extension
 *
 * @author Kate Arzamastseva <[email protected]>
 *
 * @param string $id   media id
 * @param string $ext  extension of media
 * @return string
 */
function mediaMetaFN($id,$ext){
    global $conf;
    $id = cleanID($id);
    $id = str_replace(':','/',$id);
    $fn = $conf['mediametadir'].'/'.utf8_encodeFN($id).$ext;
    return $fn;
}

/**
 * returns an array of full paths to all metafiles of a given ID
 *
 * @author Esther Brunner <[email protected]>
 * @author Michael Hamann <[email protected]>
 *
 * @param string $id page id
 * @return array
 */
function metaFiles($id){
    $basename = metaFN($id, '');
    $files    = glob($basename.'.*', GLOB_MARK);
    // filter files like foo.bar.meta when $id == 'foo'
    return    $files ? preg_grep('/^'.preg_quote($basename, '/').'\.[^.\/]*$/u', $files) : array();
}

/**
 * returns the full path to the mediafile specified by ID
 *
 * The filename is URL encoded to protect Unicode chars
 *
 * @author Andreas Gohr <[email protected]>
 * @author Kate Arzamastseva <[email protected]>
 *
 * @param string     $id  media id
 * @param string|int $rev empty string or revision timestamp
 * @param bool $clean
 *
 * @return string full path
 */
function mediaFN($id, $rev='', $clean=true){
    global $conf;
    if ($clean) $id = cleanID($id);
    $id = str_replace(':','/',$id);
    if(empty($rev)){
        $fn = $conf['mediadir'].'/'.utf8_encodeFN($id);
    }else{
        $ext = mimetype($id);
        $name = substr($id,0, -1*strlen($ext[0])-1);
        $fn = $conf['mediaolddir'].'/'.utf8_encodeFN($name .'.'.( (int) $rev ).'.'.$ext[0]);
    }
    return $fn;
}

/**
 * Returns the full filepath to a localized file if local
 * version isn't found the english one is returned
 *
 * @param  string $id  The id of the local file
 * @param  string $ext The file extension (usually txt)
 * @return string full filepath to localized file
 *
 * @author Andreas Gohr <[email protected]>
 */
function localeFN($id,$ext='txt'){
    global $conf;
    $file = DOKU_CONF.'lang/'.$conf['lang'].'/'.$id.'.'.$ext;
    if(!file_exists($file)){
        $file = DOKU_INC.'inc/lang/'.$conf['lang'].'/'.$id.'.'.$ext;
        if(!file_exists($file)){
            //fall back to english
            $file = DOKU_INC.'inc/lang/en/'.$id.'.'.$ext;
        }
    }
    return $file;
}

/**
 * Resolve relative paths in IDs
 *
 * Do not call directly use resolve_mediaid or resolve_pageid
 * instead
 *
 * Partyly based on a cleanPath function found at
 * http://php.net/manual/en/function.realpath.php#57016
 *
 * @author <bart at mediawave dot nl>
 *
 * @param string $ns     namespace which is context of id
 * @param string $id     relative id
 * @param bool   $clean  flag indicating that id should be cleaned
 * @return string
 */
function resolve_id($ns,$id,$clean=true){
    global $conf;

    // some pre cleaning for useslash:
    if($conf['useslash']) $id = str_replace('/',':',$id);

    // if the id starts with a dot we need to handle the
    // relative stuff
    if($id && $id[0] == '.'){
        // normalize initial dots without a colon
        $id = preg_replace('/^((\.+:)*)(\.+)(?=[^:\.])/','\1\3:',$id);
        // prepend the current namespace
        $id = $ns.':'.$id;

        // cleanup relatives
        $result = array();
        $pathA  = explode(':', $id);
        if (!$pathA[0]) $result[] = '';
        foreach ($pathA AS $key => $dir) {
            if ($dir == '..') {
                if (end($result) == '..') {
                    $result[] = '..';
                } elseif (!array_pop($result)) {
                    $result[] = '..';
                }
            } elseif ($dir && $dir != '.') {
                $result[] = $dir;
            }
        }
        if (!end($pathA)) $result[] = '';
        $id = implode(':', $result);
    }elseif($ns !== false && strpos($id,':') === false){
        //if link contains no namespace. add current namespace (if any)
        $id = $ns.':'.$id;
    }

    if($clean) $id = cleanID($id);
    return $id;
}

/**
 * Returns a full media id
 *
 * @author Andreas Gohr <[email protected]>
 *
 * @param string $ns namespace which is context of id
 * @param string &$page (reference) relative media id, updated to resolved id
 * @param bool &$exists (reference) updated with existance of media
 * @param int|string $rev
 * @param bool $date_at
 */
function resolve_mediaid($ns,&$page,&$exists,$rev='',$date_at=false){
    $page   = resolve_id($ns,$page);
    if($rev !== '' &&  $date_at){
        $medialog = new MediaChangeLog($page);
        $medialog_rev = $medialog->getLastRevisionAt($rev);
        if($medialog_rev !== false) {
            $rev = $medialog_rev;
        }
    }

    $file   = mediaFN($page,$rev);
    $exists = file_exists($file);
}

/**
 * Returns a full page id
 *
 * @author Andreas Gohr <[email protected]>
 *
 * @param string $ns namespace which is context of id
 * @param string &$page (reference) relative page id, updated to resolved id
 * @param bool &$exists (reference) updated with existance of media
 * @param string $rev
 * @param bool $date_at
 */
function resolve_pageid($ns,&$page,&$exists,$rev='',$date_at=false ){
    global $conf;
    global $ID;
    $exists = false;

    //empty address should point to current page
    if ($page === "") {
        $page = $ID;
    }

    //keep hashlink if exists then clean both parts
    if (strpos($page,'#')) {
        list($page,$hash) = explode('#',$page,2);
    } else {
        $hash = '';
    }
    $hash = cleanID($hash);
    $page = resolve_id($ns,$page,false); // resolve but don't clean, yet

    // get filename (calls clean itself)
    if($rev !== '' && $date_at) {
        $pagelog = new PageChangeLog($page);
        $pagelog_rev = $pagelog->getLastRevisionAt($rev);
        if($pagelog_rev !== false)//something found
           $rev  = $pagelog_rev;
    }
    $file = wikiFN($page,$rev);

    // if ends with colon or slash we have a namespace link
    if(in_array(substr($page,-1), array(':', ';')) ||
       ($conf['useslash'] && substr($page,-1) == '/')){
        if(page_exists($page.$conf['start'],$rev,true,$date_at)){
            // start page inside namespace
            $page = $page.$conf['start'];
            $exists = true;
        }elseif(page_exists($page.noNS(cleanID($page)),$rev,true,$date_at)){
            // page named like the NS inside the NS
            $page = $page.noNS(cleanID($page));
            $exists = true;
        }elseif(page_exists($page,$rev,true,$date_at)){
            // page like namespace exists
            $page = $page;

            $exists = true;
        }else{
            // fall back to default
            $page = $page.$conf['start'];
        }
    }else{
        //check alternative plural/nonplural form
        if(!file_exists($file)){
            if( $conf['autoplural'] ){
                if(substr($page,-1) == 's'){
                    $try = substr($page,0,-1);
                }else{
                    $try = $page.'s';
                }
                if(page_exists($try,$rev,true,$date_at)){
                    $page   = $try;
                    $exists = true;
                }
            }
        }else{
            $exists = true;
        }
    }

    // now make sure we have a clean page
    $page = cleanID($page);

    //add hash if any
    if(!empty($hash)) $page .= '#'.$hash;
}

/**
 * Returns the name of a cachefile from given data
 *
 * The needed directory is created by this function!
 *
 * @author Andreas Gohr <[email protected]>
 *
 * @param string $data  This data is used to create a unique md5 name
 * @param string $ext   This is appended to the filename if given
 * @return string       The filename of the cachefile
 */
function getCacheName($data,$ext=''){
    global $conf;
    $md5  = md5($data);
    $file = $conf['cachedir'].'/'.$md5[0].'/'.$md5.$ext;
    io_makeFileDir($file);
    return $file;
}

/**
 * Checks a pageid against $conf['hidepages']
 *
 * @author Andreas Gohr <[email protected]>
 *
 * @param string $id page id
 * @return bool
 */
function isHiddenPage($id){
    $data = array(
        'id' => $id,
        'hidden' => false
    );
    \dokuwiki\Extension\Event::createAndTrigger('PAGEUTILS_ID_HIDEPAGE', $data, '_isHiddenPage');
    return $data['hidden'];
}

/**
 * callback checks if page is hidden
 *
 * @param array $data event data    - see isHiddenPage()
 */
function _isHiddenPage(&$data) {
    global $conf;
    global $ACT;

    if ($data['hidden']) return;
    if(empty($conf['hidepages'])) return;
    if($ACT == 'admin') return;

    if(preg_match('/'.$conf['hidepages'].'/ui',':'.$data['id'])){
        $data['hidden'] = true;
    }
}

/**
 * Reverse of isHiddenPage
 *
 * @author Andreas Gohr <[email protected]>
 *
 * @param string $id page id
 * @return bool
 */
function isVisiblePage($id){
    return !isHiddenPage($id);
}

/**
 * Format an id for output to a user
 *
 * Namespaces are denoted by a trailing “:*”. The root namespace is
 * “*”. Output is escaped.
 *
 * @author Adrian Lang <[email protected]>
 *
 * @param string $id page id
 * @return string
 */
function prettyprint_id($id) {
    if (!$id || $id === ':') {
        return '*';
    }
    if ((substr($id, -1, 1) === ':')) {
        $id .= '*';
    }
    return hsc($id);
}

/**
 * Encode a UTF-8 filename to use on any filesystem
 *
 * Uses the 'fnencode' option to determine encoding
 *
 * When the second parameter is true the string will
 * be encoded only if non ASCII characters are detected -
 * This makes it safe to run it multiple times on the
 * same string (default is true)
 *
 * @author Andreas Gohr <[email protected]>
 * @see    urlencode
 *
 * @param string $file file name
 * @param bool   $safe if true, only encoded when non ASCII characters detected
 * @return string
 */
function utf8_encodeFN($file,$safe=true){
    global $conf;
    if($conf['fnencode'] == 'utf-8') return $file;

    if($safe && preg_match('#^[a-zA-Z0-9/_\-\.%]+$#',$file)){
        return $file;
    }

    if($conf['fnencode'] == 'safe'){
        return SafeFN::encode($file);
    }

    $file = urlencode($file);
    $file = str_replace('%2F','/',$file);
    return $file;
}

/**
 * Decode a filename back to UTF-8
 *
 * Uses the 'fnencode' option to determine encoding
 *
 * @author Andreas Gohr <[email protected]>
 * @see    urldecode
 *
 * @param string $file file name
 * @return string
 */
function utf8_decodeFN($file){
    global $conf;
    if($conf['fnencode'] == 'utf-8') return $file;

    if($conf['fnencode'] == 'safe'){
        return SafeFN::decode($file);
    }

    return urldecode($file);
}

/**
 * Find a page in the current namespace (determined from $ID) or any
 * higher namespace that can be accessed by the current user,
 * this condition can be overriden by an optional parameter.
 *
 * Used for sidebars, but can be used other stuff as well
 *
 * @todo   add event hook
 *
 * @param  string $page the pagename you're looking for
 * @param bool $useacl only return pages readable by the current user, false to ignore ACLs
 * @return false|string the full page id of the found page, false if any
 */
function page_findnearest($page, $useacl = true){
    if ((string) $page === '') return false;
    global $ID;

    $ns = $ID;
    do {
        $ns = getNS($ns);
        $pageid = cleanID("$ns:$page");
        if(page_exists($pageid) && (!$useacl || auth_quickaclcheck($pageid) >= AUTH_READ)){
            return $pageid;
        }
    } while($ns !== false);

    return false;
}


splitbrain / dokuwiki

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inc/pageutils.php (4 issues)

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