3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = array( 8 => 2, 4 => 4, 7 => 6, ); foreach($data as $key => $val) { echo $key.' : '.$val."\n"; } print_r($data);
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, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
8 : 2 4 : 4 7 : 6 Array ( [8] => 2 [4] => 4 [7] => 6 )
preferences:
222.86 ms | 406 KiB | 328 Q