Color keywords now case-insensitive.
[htmlpurifier.git] / library / HTMLPurifier / AttrDef / HTML / Color.php
blob00d865723b39905ba41008a4d22a7c1ac0a31d0c
1 <?php
3 /**
4 * Validates a color according to the HTML spec.
5 */
6 class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
9 public function validate($string, $config, $context) {
11 static $colors = null;
12 if ($colors === null) $colors = $config->get('Core.ColorKeywords');
14 $string = trim($string);
16 if (empty($string)) return false;
17 if (isset($colors[strtolower($string)])) return $colors[$string];
18 if ($string[0] === '#') $hex = substr($string, 1);
19 else $hex = $string;
21 $length = strlen($hex);
22 if ($length !== 3 && $length !== 6) return false;
23 if (!ctype_xdigit($hex)) return false;
24 if ($length === 3) $hex = $hex[0].$hex[0].$hex[1].$hex[1].$hex[2].$hex[2];
26 return "#$hex";
32 // vim: et sw=4 sts=4