Online PHP editor | output for 7Pdhu

@ 2020-04-20T04:04:32Z

<?php

$array = array ( array(
            'id' => '2',
            'name' => 'Item2',
            'children' => array(
                                 array(
                                            'id' => '1',
                                            'name' => 'Item1',
                                            'children' => array(
                                                                    array('id' => '5', 'name' => 'Item5')
                                                                )
                                ),
                                array(
                                            'id' => '4',
                                            'name' => 'Item4'
                                )
            )
),
 array(
        'id' => '3',
        'name' => 'Item3'
)
);

function list_items($array, $parent = 0) {
    $output = array();
    foreach ($array as $arr) {
        $output[] = array('id' => $arr['id'], 'name' => $arr['name'], 'parent' => $parent);
        if (is_array($arr['children'] ?? NULL)) {
            $output = array_merge($output, list_items($arr['children'], $arr['id']));
        }
    }
    return $output;
}

$items = list_items($array);
print_r($items);

Output for 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 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.14, 8.4.1: Array ( [0] => Array ( [id] => 2 [name] => Item2 [parent] => 0 ) [1] => Array ( [id] => 1 [name] => Item1 [parent] => 2 ) [2] => Array ( [id] => 5 [name] => Item5 [parent] => 1 ) [3] => Array ( [id] => 4 [name] => Item4 [parent] => 2 ) [4] => Array ( [id] => 3 [name] => Item3 [parent] => 0 ) )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: Parse error: syntax error, unexpected '?' in /in/7Pdhu on line 30
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 '?' in /in/7Pdhu on line 30
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/7Pdhu on line 30
Process exited with code 255.

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