55      * @param mixed $var Variable to validate
61     final public function parse($var, $type, $allow_null = false)  argument
70         $var = $this->parseImplementation($var, $type, $allow_null);
71         if ($allow_null && $var === null) {
81                 if (!is_string($var)) {
85                     $var = strtolower($var);
87                 return $var;
89                 if (!is_int($var)) {
92                 return $var;
94                 if (!is_float($var)) {
97                 return $var;
99                 if (!is_bool($var)) {
102                 return $var;
106                 if (!is_array($var)) {
110                     foreach ($var as $k) {
116                     $keys = array_keys($var);
121                 return $var;
123                 return $var;
127         $this->errorGeneric($var, $type);
133      * @param mixed $var
138     protected function parseImplementation($var, $type, $allow_null)  argument
140         return $var;
171      * @param mixed $var
174     protected function errorGeneric($var, $type)  argument
176         $vtype = gettype($var);