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run code in 150+ php & hhvm versions
Bugs & Features
<?php $subject = array( 'Mykey' => 'MyValue', 'MyOtherKey' => 'MyOtherValue' ); $magic = array_merge(...array_map(null, array_keys($subject), array_values($subject))); var_dump($magic);
Output for 5.6.8 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
array(4) { [0]=> string(5) "Mykey" [1]=> string(7) "MyValue" [2]=> string(10) "MyOtherKey" [3]=> string(12) "MyOtherValue" }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '.' in /in/5kqYa on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.4.45
Parse error: syntax error, unexpected '.', expecting ')' in /in/5kqYa on line 4
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 '.', expecting ')' in /in/5kqYa on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/5kqYa on line 4
Process exited with code 255.