3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = array(array(1=>2,3=>4),array(5=>6,7=>8)); foreach ($foo as $key => $value) { echo "{$key} => {$value}"; echo '<br />'; } ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Array to string conversion in /in/vvrXB on line 4 0 => Array<br /> Warning: Array to string conversion in /in/vvrXB on line 4 1 => Array<br />
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Array to string conversion in /in/vvrXB on line 4 0 => Array<br /> Notice: Array to string conversion in /in/vvrXB on line 4 1 => Array<br />
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 7.3.32 - 7.3.33
0 => Array<br />1 => Array<br />
preferences:
328.8 ms | 403 KiB | 460 Q