3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [ [ 'id' => 123, ], [ 'id' => 124, ], [ 'id' => 125, ] ]; $b = array_map(function($item) { return $item['id']; }, $a); var_dump();
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 ArgumentCountError: var_dump() expects at least 1 argument, 0 given in /in/hKlcA:16 Stack trace: #0 /in/hKlcA(16): var_dump() #1 {main} thrown in /in/hKlcA on line 16
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: var_dump() expects at least 1 parameter, 0 given in /in/hKlcA on line 16
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/hKlcA on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/hKlcA on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/hKlcA on line 2
Process exited with code 255.

preferences:
310.61 ms | 401 KiB | 396 Q