3v4l.org

run code in 300+ PHP versions simultaneously
<?php try { array_merge([1, 2], a: [3, 4]); } catch (ArgumentCountError $e) { echo $e->getMessage(); }
Output for 8.0.0 - 8.0.1, 8.1.1 - 8.1.33, 8.2.10 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array_merge() does not accept unknown named parameters
Output for 7.3.0 - 7.3.26, 7.4.0 - 7.4.14
Parse error: syntax error, unexpected ':', expecting ')' in /in/Cjfn1 on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.34
Parse error: syntax error, unexpected ':', expecting ',' or ')' in /in/Cjfn1 on line 4
Process exited with code 255.
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81.76 ms | 408 KiB | 5 Q