public function disallowPhpFunction($func)
    {
        if (is_array($func)) {
            foreach ($func as $fname) {
                unset($this->allowedPhpFunctions[strtolower($fname)]);
            }
        } else {
            unset($this->allowedPhpFunctions[strtolower($func)]);
        }
    }
public function disallowPhpFunction($func)
    {
        if (is_array($func)) {
            foreach ($func as $fname) {
                unset($this->allowedPhpFunctions[strtolower($fname)]);
            }
        } else {
            unset($this->allowedPhpFunctions[strtolower($func)]);
        }
    }
public function disallowPhpFunction ( $ func ) { if ( is_array ( $ func ) ) { foreach ( $ func as $ fname ) { unset ( $ this -> allowedPhpFunctions [ strtolower ( $ fname ) ] ) ; } } else { unset ( $ this -> allowedPhpFunctions [ strtolower ( $ func ) ] ) ; } }
Removes a php function from the allowed list.

@param mixed $func function name or array of function names
Removes a php function from the allowed list .