3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( array( array( array( 'leaf-0-0-0-0', 'leaf-0-0-0-1' ), 'leaf-0-0-0' ), array( array( 'leaf-0-1-0-0', 'leaf-0-1-0-1' ), 'leaf-0-1-0' ), 'leaf-0-0' ) ); $iterator = new RecursiveIteratorIterator( new RecursiveArrayIterator($array), $mode ); foreach ($iterator as $key => $leaf) { echo "$key => $leaf", PHP_EOL; }
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined variable $mode in /in/jjhCl on line 24 Deprecated: RecursiveIteratorIterator::__construct(): Passing null to parameter #2 ($mode) of type int is deprecated in /in/jjhCl on line 23 0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 1 => leaf-0-0-0 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 1 => leaf-0-1-0 2 => leaf-0-0
Output for 8.1.0 - 8.1.28
Warning: Undefined variable $mode in /in/jjhCl on line 24 Deprecated: RecursiveIteratorIterator::__construct(): Passing null to parameter #2 ($mode) of type int is deprecated in /in/jjhCl on line 24 0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 1 => leaf-0-0-0 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 1 => leaf-0-1-0 2 => leaf-0-0
Output for 8.0.0 - 8.0.30
Warning: Undefined variable $mode in /in/jjhCl on line 24 0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 1 => leaf-0-0-0 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 1 => leaf-0-1-0 2 => leaf-0-0
Output for 7.0.0 - 7.0.18, 7.1.0 - 7.1.4, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: mode in /in/jjhCl on line 24 0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 1 => leaf-0-0-0 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 1 => leaf-0-1-0 2 => leaf-0-0
Output for 7.3.32 - 7.3.33
0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 1 => leaf-0-0-0 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 1 => leaf-0-1-0 2 => leaf-0-0
Output for 7.0.19 - 7.0.33, 7.1.5 - 7.1.33, 7.2.0 - 7.2.33
Notice: Undefined variable: mode in /in/jjhCl on line 25 0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 1 => leaf-0-0-0 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 1 => leaf-0-1-0 2 => leaf-0-0
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Notice: Undefined variable: mode in /in/jjhCl on line 26 0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 1 => leaf-0-0-0 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 1 => leaf-0-1-0 2 => leaf-0-0
preferences:
220.89 ms | 402 KiB | 374 Q