3v4l.org

run code in 300+ PHP versions simultaneously
<?php print_r(array_merge('asdf', array('foo', 'bar')));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, string given in /in/VeGcC:1 Stack trace: #0 /in/VeGcC(1): array_merge('asdf', Array) #1 {main} thrown in /in/VeGcC on line 1
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, string given in /in/VeGcC on line 1
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 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/VeGcC on line 1
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Warning</b>: array_merge() [<a href='function.array-merge'>function.array-merge</a>]: Argument #1 is not an array in <b>/in/VeGcC</b> on line <b>1</b><br />
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
Array ( [0] => asdf [1] => foo [2] => bar )

preferences:
240.84 ms | 402 KiB | 461 Q