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<?php $array1 = [ 'a' => 1 ]; $array2 = [ 'a' => 1 ]; var_dump(array_merge($array1, $array2));
based on 00aa6
Output for 5.4.0 - 7.2.0
array(1) { ["a"]=> int(1) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/oB0Ta 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/oB0Ta on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/oB0Ta on line 3
Process exited with code 255.