Scriptbox

Scriptbox is a Script sandbox for PHP.

The syntax is a subset of Javascript.
The interpreter is supporting functions, full arithmetic calculations, for-loops, if-else statements.

Output

runCode( $code );
        echo htmlentities( $interpreter->getOutput() );
    } catch( Exception $e ) {
        // should never happen because the interpreter catches all.
        echo "Unexcepted error while running the script: \n".htmlentities( $e->getMessage() )."\n";
    }
    ?>

Source