3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array ( 0 => array ( 'this' => 3, // instead 0 => 3, 'name' => 'three', ), 1 => array ( 'this' => 5, // instead 0 => 5, 'name' => 'five', ), 2 => array ( 'this' => 7, // instead 0 => 7, 'name' => 'seven', ), ); print_r(reset($arr[0]));
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 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
3

preferences:
252.17 ms | 404 KiB | 340 Q