3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); var_dump(base_convert(255,10,16));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught TypeError: base_convert(): Argument #1 ($num) must be of type string, int given in /in/Qmh6r:4 Stack trace: #0 /in/Qmh6r(4): base_convert(255, 10, 16) #1 {main} thrown in /in/Qmh6r on line 4
Process exited with code 255.
Output for 7.1.25 - 7.1.28, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
string(2) "ff"

preferences:
140.46 ms | 402 KiB | 164 Q