3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo substr_replace(1234567, " ", 3, 0);
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
123 4567
preferences:
139.3 ms | 407 KiB | 5 Q