<?php /** * Performs safe variable parsing based on types which can be used by * users. This may not be able to represent all possible data inputs, * however. */ class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser { protected function parseImplementation($var, $type, $allow_null) { if ($allow_null && $var === null) return null; switch ($type) { // Note: if code "breaks" from the switch, it triggers a generic // exception to be thrown. Specific errors can be specifically // done here. case 'mixed': case 'istring': case 'string': case 'text': case 'itext': return $var; case 'int': if (is_string($var) && ctype_digit($var)) $var = (int) $var; return $var; case 'float': if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var; return $var; case 'bool': if (is_int($var) && ($var === 0 || $var === 1)) { $var = (bool) $var; } elseif (is_string($var)) { if ($var == 'on' || $var == 'true' || $var == '1') { $var = true; } elseif ($var == 'off' || $var == 'false' || $var == '0') { $var = false; } else { throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type"); } } return $var; case 'list': case 'hash': case 'lookup': if (is_string($var)) { // special case: technically, this is an array with // a single empty string item, but having an empty // array is more intuitive if ($var == '') return array(); if (strpos($var, "\n") === false && strpos($var, "\r") === false) { // simplistic string to array method that only works // for simple lists of tag names or alphanumeric characters $var = explode(',',$var); } else { $var = preg_split('/(,|[\n\r]+)/', $var); } // remove spaces foreach ($var as $i => $j) $var[$i] = trim($j); if ($type === 'hash') { // key:value,key2:value2 $nvar = array(); foreach ($var as $keypair) { $c = explode(':', $keypair, 2); if (!isset($c[1])) continue; $nvar[$c[0]] = $c[1]; } $var = $nvar; } } if (!is_array($var)) break; $keys = array_keys($var); if ($keys === array_keys($keys)) { if ($type == 'list') return $var; elseif ($type == 'lookup') { $new = array(); foreach ($var as $key) { $new[$key] = true; } return $new; } else break; } if ($type === 'lookup') { foreach ($var as $key => $value) { $var[$key] = true; } } return $var; default: $this->errorInconsistent(__CLASS__, $type); } $this->errorGeneric($var, $type); } }