Text_Diff::__construct( string $engine, array $params )

36    function __construct( $engine, $params )37    {38        // Backward compatibility workaround.39        if (!is_string($engine)) {40            $params = array($engine, $params);41            $engine = 'auto';42        }43 44        if ($engine == 'auto') {45            $engine = extension_loaded('xdiff') ? 'xdiff' : 'native';46        } else {47            $engine = basename($engine);48        }49 50        // WP #739151        require_once dirname(__FILE__).'/Diff/Engine/' . $engine . '.php';52        $class = 'Text_Diff_Engine_' . $engine;53        $diff_engine = new $class();54 55        $this->_edits = call_user_func_array(array($diff_engine, 'diff'), $params);56    }