<?php /** * Validates an integer representation of pixels according to the HTML spec. */ class HTMLPurifier_AttrDef_HTML_Pixels extends HTMLPurifier_AttrDef { protected $max; public function __construct($max = null) { $this->max = $max; } public function validate($string, $config, $context) { $string = trim($string); if ($string === '0') return $string; if ($string === '') return false; $length = strlen($string); if (substr($string, $length - 2) == 'px') { $string = substr($string, 0, $length - 2); } if (!is_numeric($string)) return false; $int = (int) $string; if ($int < 0) return '0'; // upper-bound value, extremely high values can // crash operating systems, see <http://ha.ckers.org/imagecrash.html> // WARNING, above link WILL crash you if you're using Windows if ($this->max !== null && $int > $this->max) return (string) $this->max; return (string) $int; } public function make($string) { if ($string === '') $max = null; else $max = (int) $string; $class = get_class($this); return new $class($max); } } // vim: et sw=4 sts=4