3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
Fatal error: Uncaught Error: Undefined constant "strtolower" in /in/jSVB0:9 Stack trace: #0 {main} thrown in /in/jSVB0 on line 9
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 strtolower - assumed 'strtolower' (this will throw an Error in a future version of PHP) in /in/jSVB0 on line 9 array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" }
Output for 7.1.0 - 7.1.33
Notice: Use of undefined constant strtolower - assumed 'strtolower' in /in/jSVB0 on line 9 array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" }
preferences:
150.32 ms | 413 KiB | 5 Q