3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function arrayMergeRecursiveDistinct(array $first, array $second) { foreach ($second as $idx => $value) { if (is_integer($idx)) { $first[] = $value; } else { if (!array_key_exists($idx, $first)) { $first[$idx] = $value; } else { if (is_array($value)) { $first[$idx] = self::arrayMergeRecursiveDistinct($first[$idx], $value); } else { $first[$idx] = $value; } } } } return $first; } $a = ['a' => [1,2,3]]; $b = ['a' => [1,2,3,4]]; print_r(arrayMergeRecursiveDistinct($b, $a)); print_r(array_replace_recursive($b, $a));
based on nKMHK
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.32
Fatal error: Cannot access self:: when no class scope is active in /in/XdQEX on line 14
Process exited with code 255.
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/XdQEX on line 25
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/XdQEX on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/XdQEX on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/XdQEX on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/XdQEX on line 4
Process exited with code 255.