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<?php $array = array( array( 'id' => 1, 'children' => array( array( 'id' => 6, 'children' => array( array( 'id' => 7, ), array( 'id' => 8, ) ), // Expected // 'level' => '2', ), array( 'id' => 9, ) ), // Expected //'level' => '1' ), array( 'id' => 2, 'children' => array( array( 'id' => 10, ), array( 'id' => 13, 'children' => array( array( 'id' => 14, ), array( 'id' => 19, 'children' => array( array( 'id' => 20, ), array( 'id' => 21, ), array( 'id' => 22, ), array( 'id' => 23, ), ), // Expected //'level' => '3' ) ), // Expected //'level' => '2' ), ), // Expected //'level' => '1' ) ); function updateTreeArray(&$array, $level = 1) { foreach($array as &$item) { if (array_key_exists('children', $item) && is_array($item['children'])) { $item['level'] = $level; updateTreeArray($item['children'], $level + 1); } } } updateTreeArray($array); print_r($array);
Output for 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 - 8.3.4, 8.3.6 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
Array ( [0] => Array ( [id] => 1 [children] => Array ( [0] => Array ( [id] => 6 [children] => Array ( [0] => Array ( [id] => 7 ) [1] => Array ( [id] => 8 ) ) [level] => 2 ) [1] => Array ( [id] => 9 ) ) [level] => 1 ) [1] => Array ( [id] => 2 [children] => Array ( [0] => Array ( [id] => 10 ) [1] => Array ( [id] => 13 [children] => Array ( [0] => Array ( [id] => 14 ) [1] => Array ( [id] => 19 [children] => Array ( [0] => Array ( [id] => 20 ) [1] => Array ( [id] => 21 ) [2] => Array ( [id] => 22 ) [3] => Array ( [id] => 23 ) ) [level] => 3 ) ) [level] => 2 ) ) [level] => 1 ) )
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.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [0] => Array ( [id] => 1 [children] => Array ( [0] => Array ( [id] => 6 [children] => Array ( [0] => Array ( [id] => 7 ) [1] => Array ( [id] => 8 ) ) [level] => 2 ) [1] => Array ( [id] => 9 ) ) [level] => 1 ) [1] => Array ( [id] => 2 [children] => Array ( [0] => Array ( [id] => 10 ) [1] => Array ( [id] => 13 [children] => Array ( [0] => Array ( [id] => 14 ) [1] => Array ( [id] => 19 [children] => Array ( [0] => Array ( [id] => 20 ) [1] => Array ( [id] => 21 ) [2] => Array ( [id] => 22 ) [3] => Array ( [id] => 23 ) ) [level] => 3 ) ) [level] => 2 ) ) [level] => 1 ) )
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210.08 ms | 424 KiB | 5 Q