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run code in 300+ PHP versions simultaneously
<?php function asy($val){ echo $val+1; } $x=array(); $x[0]=asy; echo $x[0](6); ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Undefined constant "asy" in /in/R0Y5a:7 Stack trace: #0 {main} thrown in /in/R0Y5a on line 7
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant asy - assumed 'asy' (this will throw an Error in a future version of PHP) in /in/R0Y5a on line 7 7
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Use of undefined constant asy - assumed 'asy' in /in/R0Y5a on line 7 7

preferences:
263.87 ms | 402 KiB | 372 Q