HTMLPurifier 4.4.0
/home/ezyang/Dev/htmlpurifier/library/HTMLPurifier/VarParser/Flexible.php
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00001 <?php
00002 
00008 class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
00009 {
00010 
00011     protected function parseImplementation($var, $type, $allow_null) {
00012         if ($allow_null && $var === null) return null;
00013         switch ($type) {
00014             // Note: if code "breaks" from the switch, it triggers a generic
00015             // exception to be thrown. Specific errors can be specifically
00016             // done here.
00017             case self::MIXED :
00018             case self::ISTRING :
00019             case self::STRING :
00020             case self::TEXT :
00021             case self::ITEXT :
00022                 return $var;
00023             case self::INT :
00024                 if (is_string($var) && ctype_digit($var)) $var = (int) $var;
00025                 return $var;
00026             case self::FLOAT :
00027                 if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var;
00028                 return $var;
00029             case self::BOOL :
00030                 if (is_int($var) && ($var === 0 || $var === 1)) {
00031                     $var = (bool) $var;
00032                 } elseif (is_string($var)) {
00033                     if ($var == 'on' || $var == 'true' || $var == '1') {
00034                         $var = true;
00035                     } elseif ($var == 'off' || $var == 'false' || $var == '0') {
00036                         $var = false;
00037                     } else {
00038                         throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type");
00039                     }
00040                 }
00041                 return $var;
00042             case self::ALIST :
00043             case self::HASH :
00044             case self::LOOKUP :
00045                 if (is_string($var)) {
00046                     // special case: technically, this is an array with
00047                     // a single empty string item, but having an empty
00048                     // array is more intuitive
00049                     if ($var == '') return array();
00050                     if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
00051                         // simplistic string to array method that only works
00052                         // for simple lists of tag names or alphanumeric characters
00053                         $var = explode(',',$var);
00054                     } else {
00055                         $var = preg_split('/(,|[\n\r]+)/', $var);
00056                     }
00057                     // remove spaces
00058                     foreach ($var as $i => $j) $var[$i] = trim($j);
00059                     if ($type === self::HASH) {
00060                         // key:value,key2:value2
00061                         $nvar = array();
00062                         foreach ($var as $keypair) {
00063                             $c = explode(':', $keypair, 2);
00064                             if (!isset($c[1])) continue;
00065                             $nvar[trim($c[0])] = trim($c[1]);
00066                         }
00067                         $var = $nvar;
00068                     }
00069                 }
00070                 if (!is_array($var)) break;
00071                 $keys = array_keys($var);
00072                 if ($keys === array_keys($keys)) {
00073                     if ($type == self::ALIST) return $var;
00074                     elseif ($type == self::LOOKUP) {
00075                         $new = array();
00076                         foreach ($var as $key) {
00077                             $new[$key] = true;
00078                         }
00079                         return $new;
00080                     } else break;
00081                 }
00082                 if ($type === self::ALIST) {
00083                     trigger_error("Array list did not have consecutive integer indexes", E_USER_WARNING);
00084                     return array_values($var);
00085                 }
00086                 if ($type === self::LOOKUP) {
00087                     foreach ($var as $key => $value) {
00088                         if ($value !== true) {
00089                             trigger_error("Lookup array has non-true value at key '$key'; maybe your input array was not indexed numerically", E_USER_WARNING);
00090                         }
00091                         $var[$key] = true;
00092                     }
00093                 }
00094                 return $var;
00095             default:
00096                 $this->errorInconsistent(__CLASS__, $type);
00097         }
00098         $this->errorGeneric($var, $type);
00099     }
00100 
00101 }
00102 
00103 // vim: et sw=4 sts=4