3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(); $a[123] = array(); $a[123][] = array('a' => 'abc', 'b' => 'def'); $a[123][] = array('a' => '123', 'b' => '456'); foreach($a as $key => $val){ print $key; print $val; }
Output for 5.4.0 - 5.6.28, hhvm-3.10.0, 7.0.0 - 7.1.0
123 Notice: Array to string conversion in /in/UY9ko on line 12 Array
Output for hhvm-3.12.0
123 Notice: Array to string conversion in /in/UY9ko on line -1 Array
Output for 4.3.0 - 5.3.29
123Array