mirror of
https://github.com/moodle/moodle.git
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59 lines
1.8 KiB
PHP
59 lines
1.8 KiB
PHP
<?php
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/**
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* Global Search Engine for Moodle
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*
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* @package search
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* @category core
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* @subpackage document_wrappers
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* @author Valery Fremaux [valery.fremaux@club-internet.fr] > 1.8
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* @date 2008/03/31
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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*
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* this is a format handler for getting text out of a proprietary binary format
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* so it can be indexed by Lucene search engine
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*/
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/**
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* @param object $resource
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* @uses CFG, USER
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*/
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function get_text_for_indexing_htm(&$resource){
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global $CFG, $USER;
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// SECURITY : do not allow non admin execute anything on system !!
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if (!isadmin($USER->id)) return;
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// just get text
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$text = implode('', file("{$CFG->dataroot}/{$resource->course}/{$resource->reference}"));
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// extract keywords and other interesting meta information and put it back as real content for indexing
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if (preg_match('/(.*)<meta ([^>]*)>(.*)/is', $text, $matches)){
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$prefix = $matches[1];
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$meta_attributes = $matches[2];
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$suffix = $matches[3];
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if (preg_match('/name="(keywords|description)"/i', $meta_attributes)){
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preg_match('/content="([^"]+)"/i', $meta_attributes, $matches);
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$text = $prefix.' '.$matches[1].' '.$suffix;
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}
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}
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// brutally filters all html tags
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$text = preg_replace("/<[^>]*>/", '', $text);
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$text = preg_replace("/<!--[^>]*-->/", '', $text);
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$text = html_entity_decode($text, ENT_COMPAT, 'UTF-8');
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$text = mb_convert_encoding($text, 'UTF-8', 'AUTO');
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/*
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* debug code for tracing input
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echo "<hr/>";
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$FILE = fopen("filetrace.log", 'w');
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fwrite($FILE, $text);
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fclose($FILE);
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echo "<hr/>";
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*/
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if (!empty($CFG->block_search_limit_index_body)){
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$text = shorten($text, $CFG->block_search_limit_index_body);
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}
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return $text;
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}
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?>
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