3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = array( 'foo' => 'bär', 'bax' => 'b//az', ); print json_encode($var, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);

preferences:
38.41 ms | 402 KiB | 5 Q