3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(array_merge(1, array(1,2,3)));
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 TypeError: array_merge(): Argument #1 must be of type array, int given in /in/ZBuSl:4 Stack trace: #0 /in/ZBuSl(4): array_merge(1, Array) #1 {main} thrown in /in/ZBuSl on line 4
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/ZBuSl on line 4 NULL
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Warning: array_merge(): Argument #1 is not an array in /in/ZBuSl on line 4 NULL
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
array(4) { [0]=> int(1) [1]=> int(1) [2]=> int(2) [3]=> int(3) }

preferences:
280.41 ms | 402 KiB | 398 Q