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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a1 = ['foo' => 'bar', 'bar' => 'baz']; $a2 = ['baz' => 'foo']; $a3 = []; var_dump(array_merge($a1, $a2)); var_dump(array_merge($a1, $a3));
Output for 5.4.0 - 7.1.0
array(3) { ["foo"]=> string(3) "bar" ["bar"]=> string(3) "baz" ["baz"]=> string(3) "foo" } array(2) { ["foo"]=> string(3) "bar" ["bar"]=> string(3) "baz" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/Bclhr 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/Bclhr on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/Bclhr on line 2
Process exited with code 255.