Online PHP editor | output for ofP5r

@ 2022-06-17T05:15:21Z

<?php

function buildTree(array $rows, int $parentId = 0): array {
    $new = [];
    foreach ($rows as $row) {
        if ($row['parent_id'] == $parentId) {
            $new[$row['id']] = buildTree($rows, $row['id']) ?: '';
        }
    }
    return $new;
}

$resultSet = [
    ['id' => 1, 'parent_id' => 0],
    ['id' => 2, 'parent_id' => 1],
    ['id' => 3, 'parent_id' => 2],
    ['id' => 4, 'parent_id' => 2],
    ['id' => 5, 'parent_id' => 3],
    ['id' => 6, 'parent_id' => 3],
    ['id' => 7, 'parent_id' => 4],
    ['id' => 8, 'parent_id' => 4],
    ['id' => 9, 'parent_id' => 4],
];

var_export(
    buildTree($resultSet)
);

Output for 7.4.0 - 7.4.33, 8.0.1 - 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: array ( 1 => array ( 2 => array ( 3 => array ( 5 => '', 6 => '', ), 4 => array ( 7 => '', 8 => '', 9 => '', ), ), ), )
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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