protected function getBuiltinFunction($name)
    {
        $libName = 'lib' . preg_replace_callback(
            '/_(.)/',
            function ($m) {
                return ucfirst($m[1]);
            },
            ucfirst($name)
        );

        return [$this, $libName];
    }
protected function getBuiltinFunction($name)
    {
        $libName = 'lib' . preg_replace_callback(
            '/_(.)/',
            function ($m) {
                return ucfirst($m[1]);
            },
            ucfirst($name)
        );

        return [$this, $libName];
    }
protected function getBuiltinFunction ( $ name ) { $ libName = 'lib' . preg_replace_callback ( '/_(.)/' , function ( $ m ) { return ucfirst ( $ m [ 1 ] ) ; } , ucfirst ( $ name ) ) ; return [ $ this , $ libName ] ; }
Get built-in function

@param string $name Normalized name

@return array
Get built - in function