3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( 'fruit1' => 'apple', 'fruit2' => 'orange', 'fruit3' => 'grape', 'fruit4' => 'apple', 'fruit5' => 'apple'); foreach($array as $value) { $mykey = key($array); print_r($mykey); }
Output for 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
fruit1fruit1fruit1fruit1fruit1
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
fruit2fruit2fruit2fruit2fruit2
preferences:
133.29 ms | 402 KiB | 198 Q