Online PHP editor | output for Nl2eR

@ 2014-01-18T21:53:08Z

<?php

$a = array('foo' => "xyz", null => "abc");
$b = array('bar' => "baz", null => "xyz");


print_r(array_merge_recursive($a,$b));
print_r(merge_old($a,$b));
print_r(merge($a,$b));


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

        return $a;
    }

function merge_old(array $a, array $b)
    {
        foreach ($b as $key => $value) {
            if (array_key_exists($key, $a)) {
                if (is_int($key)) {
                    $a[] = $value;
                } elseif (is_array($value) && is_array($a[$key])) {
                    $a[$key] = merge_old($a[$key], $value);
                } else {
                    $a[$key] = $value;
                }
            } else {
                $a[$key] = $value;
            }
        }

        return $a;
    }

Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.1 - 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 ( [foo] => xyz [] => Array ( [0] => abc [1] => xyz ) [bar] => baz ) Array ( [foo] => xyz [] => xyz [bar] => baz ) Array ( [foo] => xyz [] => xyz [bar] => baz )
Output for 5.3.0: Array ( [foo] => xyz [] => Array ( [0] => abc [1] => xyz ) [bar] => baz ) Array ( [foo] => xyz [] => Array ( [0] => xyz ) [bar] => baz ) Array ( [foo] => xyz [] => Array ( [0] => xyz ) [bar] => baz )
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/Nl2eR on line 12
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/Nl2eR on line 12
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: Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/Nl2eR on line 12
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/Nl2eR on line 12
Process exited with code 255.

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