3v4l.org

run code in 300+ PHP versions simultaneously
<?php for($cislo=1; $cislo<$_GET [cislo]+1; $cislo++) { echo($cislo." "); } ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Undefined constant "cislo" in /in/lBCku:3 Stack trace: #0 {main} thrown in /in/lBCku on line 3
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 cislo - assumed 'cislo' (this will throw an Error in a future version of PHP) in /in/lBCku on line 3 Notice: Undefined index: cislo in /in/lBCku on line 3
Output for 7.3.32 - 7.3.33
Warning: Use of undefined constant cislo - assumed 'cislo' (this will throw an Error in a future version of PHP) in /in/lBCku on line 3
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Notice: Use of undefined constant cislo - assumed 'cislo' in /in/lBCku on line 3 Notice: Undefined index: cislo in /in/lBCku on line 3

preferences:
176.16 ms | 403 KiB | 274 Q