3v4l.org

run code in 300+ PHP versions simultaneously
<?php $chi=0; function asy($val){ echo $val+1; $chi+=1; } $x=array(); $x[0]=asy; echo $chi; echo $x[0](6); echo $x[0](12); ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "asy" in /in/HbKIW:8 Stack trace: #0 {main} thrown in /in/HbKIW on line 8
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 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/HbKIW on line 8 07 Notice: Undefined variable: chi in /in/HbKIW on line 5 13 Notice: Undefined variable: chi in /in/HbKIW on line 5
Output for 7.3.32 - 7.3.33
Warning: Use of undefined constant asy - assumed 'asy' (this will throw an Error in a future version of PHP) in /in/HbKIW on line 8 0713
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/HbKIW on line 8 07 Notice: Undefined variable: chi in /in/HbKIW on line 5 13 Notice: Undefined variable: chi in /in/HbKIW on line 5

preferences:
284.54 ms | 403 KiB | 376 Q