3v4l.org

run code in 300+ PHP versions simultaneously
<?php array_merge(1, 2);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, int given in /in/EGaIl:3 Stack trace: #0 /in/EGaIl(3): array_merge(1, 2) #1 {main} thrown in /in/EGaIl on line 3
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_merge(): Expected parameter 1 to be an array, int given in /in/EGaIl on line 3
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Warning: array_merge(): Argument #1 is not an array in /in/EGaIl on line 3

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