我是 php 新手，如果您能帮助我，我将不胜感激！我必须在使用 dokuwiki 构建的页面的侧边栏中添加一个词云。侧面板使用独立的 php 文件（不由 doku 管理）调用。我相信我可以做到这一点的方法是直接在side panel.php文件中调用word cloud plugins函数。谁能给我确切的语法或至少以某种方式开始。我现在所做的任何事情似乎都会导致网站根本无法显示。我附上了位于 syntax.php 中的插件的代码。谢谢！
<?php
/**
* Cloud Plugin: shows a cloud of the most frequently used words
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Esther Brunner <wikidesign@gmail.com>
*/
// must be run within Dokuwiki
if(!defined('DOKU_INC')) die();
if (!defined('DOKU_LF')) define('DOKU_LF', "\n");
if (!defined('DOKU_TAB')) define('DOKU_TAB', "\t");
if (!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once(DOKU_PLUGIN.'syntax.php');
class syntax_plugin_cloud extends DokuWiki_Syntax_Plugin {
function getType() { return 'substition'; }
function getPType() { return 'block'; }
function getSort() { return 98; }
function connectTo($mode) {
$this->Lexer->addSpecialPattern('~~\w*?CLOUD.*?~~', $mode, 'plugin_cloud');
}
function handle($match, $state, $pos, &$handler) {
$match = substr($match, 2, -2); // strip markup
if (substr($match, 0, 3) == 'TAG') {
$type = 'tag';
} elseif (substr($match, 0, 6) == 'SEARCH') {
$type = 'search';
} else {
$type = 'word';
}
list($num, $ns) = explode('>', $match, 2);
list($junk, $num) = explode(':', $num, 2);
if (!is_numeric($num)) $num = 50;
if(!is_null($ns)) $namespaces = explode('|', $ns);
return array($type, $num, $namespaces);
}
function render($mode, &$renderer, $data) {
global $conf;
list($type, $num, $namespaces) = $data;
if ($mode == 'xhtml') {
if ($type == 'tag') { // we need the tag helper plugin
if (plugin_isdisabled('tag') || (!$tag = plugin_load('helper', 'tag'))) {
msg('The Tag Plugin must be installed to display tag clouds.', -1);
return false;
}
$cloud = $this->_getTagCloud($num, $min, $max, $namespaces, $tag);
} elseif($type == 'search') {
$helper = plugin_load('helper', 'searchstats');
if($helper) {
$cloud = $helper->getSearchWordArray($num);
// calculate min/max values
$min = PHP_INT_MAX;
$max = 0;
foreach ($cloud as $size) {
$min = min($size, $min);
$max = max($size, $max);
}
} else {
msg('You have to install the searchstats plugin to use this feature.', -1);
return false;
}
} else {
$cloud = $this->_getWordCloud($num, $min, $max);
}
if (!is_array($cloud) || empty($cloud)) return false;
$delta = ($max-$min)/16;
// prevent caching to ensure the included pages are always fresh
$renderer->info['cache'] = false;
// and render the cloud
$renderer->doc .= '<div class="cloud">'.DOKU_LF;
foreach ($cloud as $word => $size) {
if ($size < $min+round($delta)) $class = 'cloud1';
elseif ($size < $min+round(2*$delta)) $class = 'cloud2';
elseif ($size < $min+round(4*$delta)) $class = 'cloud3';
elseif ($size < $min+round(8*$delta)) $class = 'cloud4';
else $class = 'cloud5';
$name = $word;
if ($type == 'tag') {
$id = $word;
$exists = false;
resolve_pageID($tag->namespace, $id, $exists);
if($exists) {
$link = wl($id);
if($conf['useheading']) {
$name = p_get_first_heading($id, false);
} else {
$name = $word;
}
} else {
$link = wl($id, array('do'=>'showtag', 'tag'=>$word));
}
$title = $word;
$class .= ($exists ? '_tag1' : '_tag2');
} else {
if($conf['userewrite'] == 2) {
$link = wl($word, array('do'=>'search', 'id'=>$word));
$title = $size;
} else {
$link = wl($word, 'do=search');
$title = $size;
}
}
$renderer->doc .= DOKU_TAB . '<a href="' . $link . '" class="' . $class .'"'
.' title="' . $title . '">' . hsc($name) . '</a>' . DOKU_LF;
}
$renderer->doc .= '</div>' . DOKU_LF;
return true;
}
return false;
}
/**
* Returns the sorted word cloud array
*/
function _getWordCloud($num, &$min, &$max) {
global $conf;
// load stopwords
$swfile = DOKU_INC.'inc/lang/'.$conf['lang'].'/stopwords.txt';
if (@file_exists($swfile)) $stopwords = file($swfile, FILE_IGNORE_NEW_LINES);
else $stopwords = array();
// load extra local stopwords
$swfile = DOKU_CONF.'stopwords.txt';
if (@file_exists($swfile)) $stopwords = array_merge($stopwords, file($swfile, FILE_IGNORE_NEW_LINES));
$cloud = array();
if (@file_exists($conf['indexdir'].'/page.idx')) { // new word-length based index
require_once(DOKU_INC.'inc/indexer.php');
$n = $this->getConf('minimum_word_length'); // minimum word length
$lengths = idx_indexLengths($n);
foreach ($lengths as $len) {
$idx = idx_getIndex('i', $len);
$word_idx = idx_getIndex('w', $len);
$this->_addWordsToCloud($cloud, $idx, $word_idx, $stopwords);
}
} else { // old index
$idx = file($conf['cachedir'].'/index.idx');
$word_idx = file($conf['cachedir'].'/word.idx');
$this->_addWordsToCloud($cloud, $idx, $word_idx, $stopwords);
}
return $this->_sortCloud($cloud, $num, $min, $max);
}
/**
* Adds all words in given index as $word => $freq to $cloud array
*/
function _addWordsToCloud(&$cloud, $idx, $word_idx, &$stopwords) {
$wcount = count($word_idx);
// collect the frequency of the words
for ($i = 0; $i < $wcount; $i++) {
$key = trim($word_idx[$i]);
if (!is_int(array_search($key, $stopwords))) {
$value = explode(':', $idx[$i]);
if (!trim($value[0])) continue;
$cloud[$key] = count($value);
}
}
}
/**
* Returns the sorted tag cloud array
*/
function _getTagCloud($num, &$min, &$max, $namespaces = NULL, &$tag) {
$cloud = $tag->tagOccurrences(NULL, $namespaces, true, $this->getConf('list_tags_of_subns'));
$blacklist = $this->getConf('tag_blacklist');
if(!empty($blacklist)) {
$blacklist = explode(',', $blacklist);
$blacklist = str_replace(' ', '', $blacklist); // remove spaces
foreach ($blacklist as $tag) {
if (isset($cloud[$tag]))
unset($cloud[$tag]);
}
}
return $this->_sortCloud($cloud, $num, $min, $max);
}
/**
* Sorts and slices the cloud
*/
function _sortCloud($cloud, $num, &$min, &$max) {
if(empty($cloud)) return;
// sort by frequency, then alphabetically
arsort($cloud);
$cloud = array_chunk($cloud, $num, true);
$max = current($cloud[0]);
$min = end($cloud[0]);
ksort($cloud[0]);
return $cloud[0];
}
}
// vim:ts=4:sw=4:et: