PHP PageExists函數代碼示例

function MakeUTF8PageName($basepage, $x)
{
    global $PagePathFmt;
    $PageNameChars = '-\\w\\x80-\\xff';
    if (!preg_match('/(?:([^.\\/]+)[.\\/])?([^.\\/]+)$/', $x, $m)) {
        return '';
    }
    $name = preg_replace("/[^{$PageNameChars}]+/", ' ', $m[2]);
    $name = preg_replace('/(?<=^| )(.)/eu', "mb_strtoupper('\$1','UTF-8')", $name);
    $name = str_replace(' ', '', $name);
    if ($m[1]) {
        $group = preg_replace("/[^{$PageNameChars}]+/", ' ', $m[1]);
        $group = preg_replace('/(?<=^| )(.)/eu', "mb_strtoupper('\$1','UTF-8')", $group);
        $group = str_replace(' ', '', $group);
        return "{$group}.{$name}";
    }
    foreach ((array) $PagePathFmt as $pg) {
        $pn = FmtPageName(str_replace('$1', $name, $pg), $basepage);
        if (PageExists($pn)) {
            return $pn;
        }
    }
    $group = preg_replace('/[\\/.].*$/', '', $basepage);
    return "{$group}.{$name}";
}

function MergeSimulEdits($pagename,&$page,&$new) {
  global $Now, $EnablePost, $MessagesFmt, $WorkDir;
  if (@!$_POST['basetime'] || !PageExists($pagename) 
      || $page['time'] >= $Now
      || $_POST['basetime']>=$page['time']
      || $page['text'] == $new['text']) return;
  $EnablePost = 0;
  $old = array();
  RestorePage($pagename,$page,$old,"diff:{$_POST['basetime']}");
  $text = Merge($new['text'],$old['text'],$page['text']);
  if ($text > '') { $new['text'] = $text; $ec = '$[EditConflict]'; }
  else $ec = '$[EditWarning]';
  XLSDV('en', array(
    'EditConflict' => "The page you are
      editing has been modified since you started editing it.
      The modifications have been merged into the text below, 
      you may want to verify the results of the merge before
      pressing save.  Conflicts the system couldn't resolve are
      bracketed by <<<<<<< and
      >>>>>>>.",
    'EditWarning' => "The page you are editing has been modified
      since you started editing it.  If you continue, your
      changes will overwrite any changes that others have made."));
  $MessagesFmt[] = "<p class='editconflict'>$ec
    (<a target='_blank' href='\$PageUrl?action=diff'>$[View changes]</a>)
    </p>\n";
}

function EditDraft(&$pagename, &$page, &$new)
{
    global $WikiDir, $DraftSuffix, $DeleteKeyPattern, $EnableDraftAtomicDiff, $DraftRecentChangesFmt, $RecentChangesFmt, $Now;
    SDV($DeleteKeyPattern, "^\\s*delete\\s*\$");
    $basename = preg_replace("/{$DraftSuffix}\$/", '', $pagename);
    $draftname = $basename . $DraftSuffix;
    if ($_POST['postdraft'] || $_POST['postedit']) {
        $pagename = $draftname;
    } else {
        if ($_POST['post'] && !preg_match("/{$DeleteKeyPattern}/", $new['text'])) {
            $pagename = $basename;
            if (IsEnabled($EnableDraftAtomicDiff, 0)) {
                $page = ReadPage($basename);
                foreach ($new as $k => $v) {
                    # delete draft history
                    if (preg_match('/:\\d+(:\\d+:)?$/', $k) && !preg_match("/:{$Now}(:\\d+:)?\$/", $k)) {
                        unset($new[$k]);
                    }
                }
                unset($new['rev']);
                SDVA($new, $page);
            }
            $WikiDir->delete($draftname);
        } else {
            if (PageExists($draftname) && $pagename != $draftname) {
                Redirect($draftname, '$PageUrl?action=edit');
                exit;
            }
        }
    }
    if ($pagename == $draftname && isset($DraftRecentChangesFmt)) {
        $RecentChangesFmt = $DraftRecentChangesFmt;
    }
}

function RetrievePageMarkup($pagelist)
{
    foreach ($pagelist as $p) {
        if (PageExists($p)) {
            $page = RetrieveAuthPage($p, 'read', false, READPAGE_CURRENT);
            return array($page['text'], $page['title']);
            break;
        }
    }
    return null;
}

function MergeSimulEdits($pagename, &$page, &$new)
{
    global $MessagesFmt, $WorkDir, $SysMergeCmd;
    SDV($SysMergeCmd, "/usr/bin/diff3 -L '' -L '' -L '' -m -E");
    if (@(!$_POST['basetime']) || !PageExists($pagename) || $_POST['basetime'] >= $page['time']) {
        return;
    }
    unset($_POST['post']);
    $MessagesFmt[] = "<p class='editconflict'>The page you are \n    editing has been modified since you started editing it.  \n    The modifications have been merged into the text below,\n    you may want to verify the results of the merge before\n    pressing save.  Conflicts the system couldn't resolve are\n    bracketed by &lt;&lt;&lt;&lt;&lt;&lt;&lt; and \n    &gt;&gt;&gt;&gt;&gt;&gt;&gt;.  (<a target='_blank' \n    href='\$PageUrl?action=diff'>View changes</a>)</p>\n";
    $old = array();
    RestorePage($pagename, $page, $old, "diff:{$_POST['basetime']}");
    $new['text'] = Merge($new['text'], $old['text'], $page['text']);
}

function EditDraft(&$pagename, &$page, &$new) {
  global $WikiDir, $DraftSuffix, $DeleteKeyPattern, 
    $DraftRecentChangesFmt, $RecentChangesFmt;
  SDV($DeleteKeyPattern, "^\\s*delete\\s*$");
  $basename = preg_replace("/$DraftSuffix\$/", '', $pagename);
  $draftname = $basename . $DraftSuffix;
  if ($_POST['postdraft'] || $_POST['postedit']) $pagename = $draftname; 
  else if ($_POST['post'] && !preg_match("/$DeleteKeyPattern/", $new['text'])) { 
    $pagename = $basename; 
    # $page = ReadPage($basename); # breaks restores, PITS:01007, Test:DraftRestore
    $WikiDir->delete($draftname);
  }
  else if (PageExists($draftname) && $pagename != $draftname)
    { Redirect($draftname, '$PageUrl?action=edit'); exit(); }
  if ($pagename == $draftname && isset($DraftRecentChangesFmt))
    $RecentChangesFmt = $DraftRecentChangesFmt;
}

function EditDraft(&$pagename, &$page, &$new)
{
    global $WikiDir, $DraftSuffix, $DeleteKeyPattern;
    SDV($DeleteKeyPattern, "^\\s*delete\\s*\$");
    $basename = preg_replace("/{$DraftSuffix}\$/", '', $pagename);
    $draftname = $basename . $DraftSuffix;
    if ($_POST['postdraft']) {
        $pagename = $draftname;
        return;
    }
    if ($_POST['post'] && !preg_match("/{$DeleteKeyPattern}/", $new['text'])) {
        $pagename = $basename;
        $page = ReadPage($basename);
        $WikiDir->delete($draftname);
        return;
    }
    if (PageExists($draftname) && $pagename != $draftname) {
        Redirect($draftname, '$PageUrl?action=edit');
        exit;
    }
}

function WikiGallerySlideshow($pagename, $auth = 'read')
{
    global $WikiGallery_DefaultSlideshowDelay, $HTMLHeaderFmt, $WikiGallery_Register;
    // get delay from url
    if (isset($_GET["delay"])) {
        $delay = intval($_GET["delay"]);
    } else {
        $delay = $WikiGallery_DefaultSlideshowDelay;
    }
    // find following picture
    $group = PageVar($pagename, '$Group');
    $next = $WikiGallery_Register[$group]->neighbourPicturePage(PageVar($pagename, '$Name'), 1);
    $nextpage = "{$group}.{$next}";
    // exists?
    if ($next && PageExists($nextpage)) {
        // add refresh header
        $url = MakeLink($nextpage, $nextpage, NULL, NULL, "\$LinkUrl");
        array_unshift($HTMLHeaderFmt, "<meta http-equiv=\"refresh\" content=\"{$delay}; URL={$url}?action=slideshow&delay={$delay}\" />");
    }
    return HandleBrowse($pagename, $auth);
}

function EditDraft(&$pagename, &$page, &$new)
{
    global $WikiDir, $DraftSuffix, $DeleteKeyPattern, $DraftRecentChangesFmt, $RecentChangesFmt;
    SDV($DeleteKeyPattern, "^\\s*delete\\s*\$");
    $basename = preg_replace("/{$DraftSuffix}\$/", '', $pagename);
    $draftname = $basename . $DraftSuffix;
    if ($_POST['postdraft'] || $_POST['postedit']) {
        $pagename = $draftname;
    } else {
        if ($_POST['post'] && !preg_match("/{$DeleteKeyPattern}/", $new['text'])) {
            $pagename = $basename;
            $page = ReadPage($basename);
            $WikiDir->delete($draftname);
        } else {
            if (PageExists($draftname) && $pagename != $draftname) {
                Redirect($draftname, '$PageUrl?action=edit');
                exit;
            }
        }
    }
    if ($pagename == $draftname && isset($DraftRecentChangesFmt)) {
        $RecentChangesFmt = $DraftRecentChangesFmt;
    }
}

function PrintRefCount($pagename)
{
    global $GroupPattern, $NamePattern, $PageRefCountFmt, $RefCountTimeFmt;
    $pagelist = ListPages();
    $grouplist = array();
    foreach ($pagelist as $pname) {
        if (!preg_match("/^({$GroupPattern})[\\/.]({$NamePattern})\$/", $pname, $m)) {
            continue;
        }
        $grouplist[$m[1]] = $m[1];
    }
    asort($grouplist);
    $grouplist = array_merge(array('all' => 'all groups'), $grouplist);
    $wlist = array('all', 'missing', 'existing', 'orphaned');
    $tlist = isset($_REQUEST['tlist']) ? $_REQUEST['tlist'] : array('all');
    $flist = isset($_REQUEST['flist']) ? $_REQUEST['flist'] : array('all');
    $whichrefs = @$_REQUEST['whichrefs'];
    $showrefs = @$_REQUEST['showrefs'];
    $submit = @$_REQUEST['submit'];
    echo FmtPageName($PageRefCountFmt, $pagename);
    echo "<form method='post'><input type='hidden' action='refcount'>\n    <table cellspacing='10'><tr><td valign='top'>Show\n    <br><select name='whichrefs'>";
    foreach ($wlist as $w) {
        echo "<option ", $whichrefs == $w ? 'selected' : '', " value='{$w}'>{$w}\n";
    }
    echo "</select></td><td valign='top'> page names in group<br>\n    <select name='tlist[]' multiple size='4'>";
    foreach ($grouplist as $g => $t) {
        echo "<option ", in_array($g, $tlist) ? 'selected' : '', " value='{$g}'>{$t}\n";
    }
    echo "</select></td><td valign='top'> referenced from pages in<br>\n    <select name='flist[]' multiple size='4'>";
    foreach ($grouplist as $g => $t) {
        echo "<option ", in_array($g, $flist) ? 'selected' : '', " value='{$g}'>{$t}\n";
    }
    echo "</select></td></tr></table>\n    <p><input type='checkbox' name='showrefs' value='checked' {$showrefs}>\n      Display referencing pages\n    <p><input type='submit' name='submit' value='Search'></form><p><hr>";
    if ($submit) {
        foreach ($pagelist as $pname) {
            $ref = array();
            $page = ReadPage($pname, READPAGE_CURRENT);
            if (!$page) {
                continue;
            }
            $tref[$pname]['time'] = $page['time'];
            if (!in_array('all', $flist) && !in_array(FmtPageName('$Group', $pname), $flist)) {
                continue;
            }
            $rc = preg_match('/RecentChanges$/', $pname);
            foreach (explode(',', @$page['targets']) as $r) {
                if ($r == '') {
                    continue;
                }
                if ($rc) {
                    @$tref[$r]['rc']++;
                } else {
                    @$tref[$r]['page']++;
                    @$pref[$r][$pname]++;
                }
            }
        }
        uasort($tref, 'RefCountCmp');
        echo "<table >\n      <tr><th></th><th colspan='2'>Referring pages</th></tr>\n      <tr><th>Name / Time</th><th>All</th><th>R.C.</th></tr>";
        reset($tref);
        foreach ($tref as $p => $c) {
            if (!in_array('all', $tlist) && !in_array(FmtPageName('$Group', $p), $tlist)) {
                continue;
            }
            if ($whichrefs == 'missing' && PageExists($p)) {
                continue;
            } elseif ($whichrefs == 'existing' && !PageExists($p)) {
                continue;
            } elseif ($whichrefs == 'orphaned' && (@$tref[$p]['page'] > 0 || !PageExists($p))) {
                continue;
            }
            echo "<tr><td valign='top'>", LinkPage($pagename, '', $p, '', $p);
            if (@$tref[$p]['time']) {
                echo strftime($RefCountTimeFmt, $tref[$p]['time']);
            }
            if ($showrefs && is_array(@$pref[$p])) {
                foreach ($pref[$p] as $pr => $pc) {
                    echo "<dd>", LinkPage($pagename, '', $pr, '', $pr);
                }
            }
            echo "</td>";
            echo "<td align='center' valign='top'>", @$tref[$p]['page'] + 0, "</td>";
            echo "<td align='center' valign='top'>", @$tref[$p]['rc'] + 0, "</td>";
            echo "</tr>";
        }
        echo "</table>";
    }
}

function bi_IsPage($pn)
{
    global $bi_Pagename;
    $mp = MakePageName($bi_Pagename, $pn);
    if (empty($mp)) {
        return true;
    }
    if ($mp == $bi_Pagename) {
        return false;
    }
    return PageExists($mp);
}

function FPLTemplate($pagename, &$matches, $opt)
{
    global $Cursor, $FPLFormatOpt, $FPLTemplatePageFmt;
    SDV($FPLTemplatePageFmt, array('{$FullName}', '{$SiteGroup}.LocalTemplates', '{$SiteGroup}.PageListTemplates'));
    $template = @$opt['template'];
    if (!$template) {
        $template = @$opt['fmt'];
    }
    list($tname, $qf) = explode('#', $template, 2);
    if ($tname) {
        $tname = array(MakePageName($pagename, $tname));
    } else {
        $tname = (array) $FPLTemplatePageFmt;
    }
    foreach ($tname as $t) {
        $t = FmtPageName($t, $pagename);
        if (!PageExists($t)) {
            continue;
        }
        if ($qf) {
            $t .= "#{$qf}";
        }
        $ttext = IncludeText($pagename, $t, true);
        if (!$qf || strpos($ttext, "[[#{$qf}]]") !== false) {
            break;
        }
    }
    ##   remove any anchor markups to avoid duplications
    $ttext = preg_replace('/\\[\\[#[A-Za-z][-.:\\w]*\\]\\]/', '', $ttext);
    if (!@$opt['order'] && !@$opt['trail']) {
        $opt['order'] = 'name';
    }
    $matches = array_values(MakePageList($pagename, $opt, 0));
    if (@$opt['count']) {
        array_splice($matches, $opt['count']);
    }
    $savecursor = $Cursor;
    $pagecount = 0;
    $groupcount = 0;
    $grouppagecount = 0;
    $vk = array('{$PageCount}', '{$GroupCount}', '{$GroupPageCount}');
    $vv = array(&$pagecount, &$groupcount, &$grouppagecount);
    $lgroup = '';
    $out = '';
    foreach ($matches as $i => $pn) {
        $prev = (string) @$matches[$i - 1];
        $next = (string) @$matches[$i + 1];
        $Cursor['<'] = $Cursor['&lt;'] = $prev;
        $Cursor['='] = $pn;
        $Cursor['>'] = $Cursor['&gt;'] = $next;
        $group = PageVar($pn, '$Group');
        if ($group != $lgroup) {
            $groupcount++;
            $grouppagecount = 0;
        }
        $grouppagecount++;
        $pagecount++;
        $item = str_replace($vk, $vv, $ttext);
        $item = preg_replace('/\\{(=|&[lg]t;)(\\$:?\\w+)\\}/e', "PageVar(\$pn, '\$2', '\$1')", $item);
        $out .= $item;
        $lgroup = $group;
    }
    $class = preg_replace('/[^-a-zA-Z0-9\\x80-\\xff]/', ' ', @$opt['class']);
    $div = $class ? "<div class='{$class}'>" : '<div>';
    return $div . MarkupToHTML($pagename, $out, array('escape' => 0)) . '</div>';
}

function HandleBrowse($pagename)
{
    # handle display of a page
    global $DefaultPageTextFmt, $FmtV, $HandleBrowseFmt, $PageStartFmt, $PageEndFmt, $PageRedirectFmt;
    Lock(1);
    $page = RetrieveAuthPage($pagename, 'read');
    if (!$page) {
        Abort('?cannot read $pagename');
    }
    PCache($pagename, $page);
    SDV($PageRedirectFmt, "<p><i>(\$[redirected from] \n    <a href='\$PageUrl?action=edit'>\$FullName</a>)</i></p>\$HTMLVSpace\n");
    if (isset($page['text'])) {
        $text = $page['text'];
    } else {
        $text = FmtPageName($DefaultPageTextFmt, $pagename);
    }
    if (@(!$_GET['from'])) {
        $PageRedirectFmt = '';
        if (preg_match('/\\(:redirect\\s+(.+?):\\)/', $text, $match)) {
            $rname = MakePageName($pagename, $match[1]);
            if (PageExists($rname)) {
                Redirect($rname, "\$PageUrl?from={$pagename}");
            }
        }
    } else {
        $PageRedirectFmt = FmtPageName($PageRedirectFmt, $_GET['from']);
    }
    $text = '(:groupheader:)' . @$text . '(:groupfooter:)';
    $FmtV['$PageText'] = MarkupToHTML($pagename, $text);
    SDV($HandleBrowseFmt, array(&$PageStartFmt, &$PageRedirectFmt, '$PageText', &$PageEndFmt));
    PrintFmt($pagename, $HandleBrowseFmt);
}

function HandleFeed($pagename, $auth = 'read')
{
    global $FeedFmt, $action, $PCache, $FmtV, $ISOTimeFmt, $RSSTimeFmt, $FeedOpt, $FeedDescPatterns, $CategoryGroup, $EntitiesTable;
    SDV($ISOTimeFmt, '%Y-%m-%dT%H:%M:%SZ');
    SDV($RSSTimeFmt, 'D, d M Y H:i:s \\G\\M\\T');
    SDV($FeedDescPatterns, array('/<[^>]*$/' => ' ', '/\\w+$/' => '', '/<[^>]+>/' => ''));
    SDVA($FeedCategoryOpt, array('link' => $pagename, 'readf' => 1));
    SDVA($FeedTrailOpt, array('trail' => $pagename, 'count' => 10, 'readf' => 1));
    $f = $FeedFmt[$action];
    $page = RetrieveAuthPage($pagename, $auth, true, READPAGE_CURRENT);
    if (!$page) {
        Abort("?cannot generate feed");
    }
    $feedtime = $page['time'];
    # determine list of pages to display
    if (@($_REQUEST['trail'] || $_REQUEST['group'] || $_REQUEST['link'])) {
        $opt['readf'] = 1;
    } else {
        if ($action == 'dc') {
            $opt = array();
        } else {
            if (preg_match("/^{$CategoryGroup}\\./", $pagename)) {
                $opt = $FeedCategoryOpt;
            } else {
                $opt = $FeedTrailOpt;
            }
        }
    }
    if (!$opt) {
        PCache($pagename, $page);
        $pagelist = array(&$PCache[$pagename]);
    } else {
        $opt = array_merge($opt, @$_REQUEST);
        $pagelist = MakePageList($pagename, $opt);
    }
    # process list of pages in feed
    $rdfseq = '';
    foreach ($pagelist as $page) {
        $pn = $page['name'];
        if (!PageExists($pn)) {
            continue;
        }
        $pl[] = $pn;
        if (@$opt['count'] && count($pl) >= $opt['count']) {
            break;
        }
        $rdfseq .= FmtPageName("<rdf:li resource=\"\$PageUrl\" />\n", $pn);
        if ($page['time'] > $feedtime) {
            $feedtime = $page['time'];
        }
    }
    $pagelist = $pl;
    $FmtV['$FeedRDFSeq'] = $rdfseq;
    $FmtV['$FeedISOTime'] = gmstrftime($ISOTimeFmt, $feedtime);
    $FmtV['$FeedRSSTime'] = gmdate($RSSTimeFmt, $feedtime);
    # format start of feed
    $out = FmtPageName($f['feed']['_start'], $pagename);
    # format feed elements
    foreach ($f['feed'] as $k => $v) {
        if ($k[0] == '_' || !$v) {
            continue;
        }
        $x = FmtPageName($v, $pagename);
        if (!$x) {
            continue;
        }
        $out .= $v[0] == '<' ? $x : "<{$k}>{$x}</{$k}>\n";
    }
    # format items in feed
    if (@$f['feed']['_items']) {
        $out .= FmtPageName($f['feed']['_items'], $pagename);
    }
    foreach ($pagelist as $pn) {
        $page =& $PCache[$pn];
        $FmtV['$ItemDesc'] = @$page['description'] ? $page['description'] : trim(preg_replace(array_keys($FeedDescPatterns), array_values($FeedDescPatterns), @$page['excerpt']));
        $FmtV['$ItemISOTime'] = gmstrftime($ISOTimeFmt, $page['time']);
        $out .= FmtPageName($f['item']['_start'], $pn);
        foreach ((array) @$f['item'] as $k => $v) {
            if ($k[0] == '_' || !$v) {
                continue;
            }
            if (is_callable($v)) {
                $out .= $v($pn, $page, $k);
                continue;
            }
            if (strpos($v, '$LastModifiedBy') !== false && !@$page['author']) {
                continue;
            }
            if (strpos($v, '$Category') !== false) {
                if (preg_match_all("/(?<=^|,){$CategoryGroup}\\.([^,]+)/", @$page['targets'], $match)) {
                    foreach ($match[1] as $c) {
                        $FmtV['$Category'] = $c;
                        $out .= FmtPageName($v, $pn);
                    }
                }
                continue;
            }
            $x = FmtPageName($v, $pn);
            if (!$x) {
                continue;
//.........這裏部分代碼省略.........

function AutoCreateTargets($pagename, &$page, &$new) {
  global $IsPagePosted, $AutoCreate, $LinkTargets;
  if (!$IsPagePosted) return;
  foreach((array)@$AutoCreate as $pat => $init) {
    if (is_null($init)) continue;
    foreach(preg_grep($pat, array_keys((array)@$LinkTargets)) as $aname) {
      if (PageExists($aname)) continue;
      $x = RetrieveAuthPage($aname, 'edit', false, READPAGE_CURRENT);
      if (!$x) continue;
      WritePage($aname, $init);
    }
  }
}