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68 lines
2.2 KiB
68 lines
2.2 KiB
2 years ago
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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Basic email protection filter.
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*
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* @package filter
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* @subpackage emailprotect
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* @copyright 2004 Mike Churchward
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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/**
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* This class looks for email addresses in Moodle text and
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* hides them using the Moodle obfuscate_text function.
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*/
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class filter_emailprotect extends moodle_text_filter {
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function filter($text, array $options = array()) {
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/// Do a quick check using stripos to avoid unnecessary work
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if (strpos($text, '@') === false) {
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return $text;
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}
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/// There might be an email in here somewhere so continue ...
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$matches = array();
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/// regular expression to define a standard email string.
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$emailregex = '((?:[\w\.\-])+\@(?:(?:[a-zA-Z\d\-])+\.)+(?:[a-zA-Z\d]{2,4}))';
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/// pattern to find a mailto link with the linked text.
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$pattern = '|(<a\s+href\s*=\s*[\'"]?mailto:)'.$emailregex.'([\'"]?\s*>)'.'(.*)'.'(</a>)|iU';
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$text = preg_replace_callback($pattern, 'filter_emailprotect_alter_mailto', $text);
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/// pattern to find any other email address in the text.
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$pattern = '/(^|\s+|>)'.$emailregex.'($|\s+|\.\s+|\.$|<)/i';
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$text = preg_replace_callback($pattern, 'filter_emailprotect_alter_email', $text);
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return $text;
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}
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}
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function filter_emailprotect_alter_email($matches) {
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return $matches[1].obfuscate_text($matches[2]).$matches[3];
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}
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function filter_emailprotect_alter_mailto($matches) {
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return obfuscate_mailto($matches[2], $matches[4]);
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}
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