3v4l.org

run code in 300+ PHP versions simultaneously
<?php substr_count ('haystack', 'needle', 0, 0);
Output for 7.1.0 - 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
Warning: substr_count(): Length should be greater than 0 in /in/jcDIo on line 3
preferences:
158.66 ms | 407 KiB | 5 Q