Online PHP editor | output for qIJrl

@ 2020-02-21T10:47:42Z

<?php

$flat = [
    ['id' => 100, 'parent_id' => 0, 'name' => 'root'],
    ['id' => 101, 'parent_id' => 100, 'name' => 'ch-1'],
    ['id' => 102, 'parent_id' => 101, 'name' => 'ch-1-1'],
    ['id' => 103, 'parent_id' => 101, 'name' => 'ch-1-2'],
    ['id' => 104, 'parent_id' => 101, 'name' => 'ch-1-2'],
    ['id' => 105, 'parent_id' => 104, 'name' => 'ch-1-2'],
    ['id' => 106, 'parent_id' => 101, 'name' => 'ch-1-2'],
    ['id' => 107, 'parent_id' => 101, 'name' => 'ch-1-2'],
];


$new = array();
foreach ($flat as $a){
    $new[$a['parent_id']][] = $a;
}
$tree = createTree($new, array($flat[0]));
print_r($tree);

function createTree(&$list, $parent){
    $tree = array();
    foreach ($parent as $k=>$l){
        if(isset($list[$l['id']])){
            $l['children'] = createTree($list, $list[$l['id']]);
        }
        $tree[] = $l;
    } 
    return $tree;
}

Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1: Array ( [0] => Array ( [id] => 100 [parent_id] => 0 [name] => root [children] => Array ( [0] => Array ( [id] => 101 [parent_id] => 100 [name] => ch-1 [children] => Array ( [0] => Array ( [id] => 102 [parent_id] => 101 [name] => ch-1-1 ) [1] => Array ( [id] => 103 [parent_id] => 101 [name] => ch-1-2 ) [2] => Array ( [id] => 104 [parent_id] => 101 [name] => ch-1-2 [children] => Array ( [0] => Array ( [id] => 105 [parent_id] => 104 [name] => ch-1-2 ) ) ) [3] => Array ( [id] => 106 [parent_id] => 101 [name] => ch-1-2 ) [4] => Array ( [id] => 107 [parent_id] => 101 [name] => ch-1-2 ) ) ) ) ) )
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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