3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a1 = [1, 2, 3]; $a2 = [4, 7, 10]; $a3 = [5, 6, 8, 9]; $it1 = new ArrayIterator($a1); $it2 = new ArrayIterator($a2); $it3 = new ArrayIterator($a3); $m = new ArrayIterator([$it1, $it2, $it3]); foreach(new \RecursiveIteratorIterator($m) as $v) { var_dump($v); }
based on G94FK
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught InvalidArgumentException: An instance of RecursiveIterator or IteratorAggregate creating it is required in /in/vPOrA:15 Stack trace: #0 /in/vPOrA(15): RecursiveIteratorIterator->__construct(Object(ArrayIterator)) #1 {main} thrown in /in/vPOrA on line 15
Process exited with code 255.
Output for 5.4.1 - 5.6.28
Fatal error: Uncaught exception 'InvalidArgumentException' with message 'An instance of RecursiveIterator or IteratorAggregate creating it is required' in /in/vPOrA:15 Stack trace: #0 /in/vPOrA(15): RecursiveIteratorIterator->__construct(Object(ArrayIterator)) #1 {main} thrown in /in/vPOrA on line 15
Process exited with code 255.
Output for 5.3.18 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/vPOrA on line 3
Process exited with code 255.