Online PHP editor | output for 0PpmZ

@ 2013-11-23T15:39:30Z

<?php
$a = array('a' => 'a', 'b' => 'b', 'z' => array('c' => 'c', 'd' => 'd'));
$b = array('a' => 'c', 'z' => array('c' => 'e'));

$merge = function(&$a, &$b) use (&$merge){
	if (is_array($a) && is_array($b)){
        foreach ($b as $key => &$value){
            if (is_array($value) && isset($a[$key]) && is_array($a[$key])){
				$a[$key] = $merge($a[$key], $value);
            } else {
                if (is_int($key)){
                    $a[] = $value;
                } else {
					$a[$key] = $value;
                }
            }
        }
        return $a;
    } else {
        return $b;
    }
};

var_dump($merge($a, $b));

Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: array(3) { ["a"]=> string(1) "c" ["b"]=> string(1) "b" ["z"]=> array(2) { ["c"]=> string(1) "e" ["d"]=> string(1) "d" } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Parse error: syntax error, unexpected T_FUNCTION in /in/0PpmZ on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_FUNCTION in /in/0PpmZ on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/0PpmZ on line 5
Process exited with code 255.

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