3v4l.org

run code in 300+ PHP versions simultaneously
<?php $encoded = substr(json_encode("\r\n\f\thoge\0\x0f", JSON_UNESCAPED_UNICODE), 1, -1); echo $encoded;
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
\r\n\f\thoge\u0000\u000f

preferences:
105.03 ms | 403 KiB | 173 Q