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https://github.com/ezyang/htmlpurifier.git
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7d2bf08d2f
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@152 48356398-32a2-884e-a903-53898d9a118a
40 lines
1.1 KiB
PHP
40 lines
1.1 KiB
PHP
<?php
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require_once 'HTMLPurifier/AttrDef.php';
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require_once 'HTMLPurifier/IDAccumulator.php';
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class HTMLPurifier_AttrDef_ID extends HTMLPurifier_AttrDef
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{
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function validate($old_id, &$accumulator) {
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$id = trim($old_id); // trim it first
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if ($id === '') return false;
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if (isset($accumulator->ids[$id])) return false;
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// we purposely avoid using regex, hopefully this is faster
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if (ctype_alpha($id)) {
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$result = true;
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} else {
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if (!ctype_alpha(@$id[0])) return false;
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$trim = trim( // primitive style of regexps, I suppose
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$id,
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'A..Za..z0..9:-._'
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);
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$result = ($trim === '');
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}
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if ($result) $accumulator->add($id);
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// if no change was made to the ID, return the result
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// else, return the new id if stripping whitespace made it
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// valid, or return false.
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return ($id == $old_id) ? $result : ($result ? $id : false);
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}
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}
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?>
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