3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = null; $b = null; $c = 'c'; $a ??= $b ??= $c; print $b; print $a;
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
cc
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '=' in /in/BBJZE on line 7
Process exited with code 255.
preferences:
61.43 ms | 407 KiB | 5 Q