3v4l.org

run code in 300+ PHP versions simultaneously
<?php $key = 'password'; $string = 'string'; $test = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key)));
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to undefined function mcrypt_encrypt() in /in/lKp4t:5 Stack trace: #0 {main} thrown in /in/lKp4t on line 5
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Call to undefined function mcrypt_encrypt() in /in/lKp4t on line 5
Process exited with code 255.

preferences:
274.23 ms | 402 KiB | 376 Q