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run code in 150+ php & hhvm versions
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<?php $a = ['a' => ['test'=>'good', 'fail'=>'notgood']]; $b = ['a' => ['add'=>'ok'], 'b' => ['4']]; print_r(array_replace_recursive($a,$b));
based on qGGv5
Output for 5.4.0 - 7.1.0
Array ( [a] => Array ( [test] => good [fail] => notgood [add] => ok ) [b] => Array ( [0] => 4 ) )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/VeIUr 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/VeIUr on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/VeIUr on line 3
Process exited with code 255.