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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = []; print_r($a+=['a'=>'1','b'=>'2']); print_r($a+=[]); print_r($a+=['a'=>'3']); print_r($a=array_merge($a,['a'=>'3']));
based on CN0nM
Output for 5.4.0 - 7.2.0
Array ( [a] => 1 [b] => 2 ) Array ( [a] => 1 [b] => 2 ) Array ( [a] => 1 [b] => 2 ) Array ( [a] => 3 [b] => 2 )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/mP2CE on line 3
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/mP2CE on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/mP2CE on line 3
Process exited with code 255.