3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = []; $x []= [17=>21]; $x []= [22=>15]; print_r($x);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => Array ( [17] => 21 ) [1] => Array ( [22] => 15 ) )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/nHck4 on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/nHck4 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/nHck4 on line 2
Process exited with code 255.