3v4l.org

run code in 300+ PHP versions simultaneously
<?php $url = "http://example.com//sf/asf///saf//asf/asf/"; $string = preg_replace('/([^:])(\/{2,})/', '$1/', $url); echo $string;
Output for 7.0.0 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
http://example.com/sf/asf/saf/asf/asf/

preferences:
144.92 ms | 404 KiB | 219 Q