<?php /** * Validates the HTML type length (not to be confused with CSS's length). * * This accepts integer pixels or percentages as lengths for certain * HTML attributes. */ class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels { public function validate($string, $config, $context) { $string = trim($string); if ($string === '') return false; $parent_result = parent::validate($string, $config, $context); if ($parent_result !== false) return $parent_result; $length = strlen($string); $last_char = $string[$length - 1]; if ($last_char !== '%') return false; $points = substr($string, 0, $length - 1); if (!is_numeric($points)) return false; $points = (int) $points; if ($points < 0) return '0%'; if ($points > 100) return '100%'; return ((string) $points) . '%'; } } // vim: et sw=4 sts=4