3v4l.org

run code in 300+ PHP versions simultaneously
<?php $letters = range('a', 'z'); // Recommended syntax. print implode('', $letters); // Old and not-recommended behavior. print implode($letters); ?>
Output for 7.1.25 - 7.1.33, 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 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
preferences:
54.06 ms | 407 KiB | 5 Q