3v4l.org

run code in 300+ PHP versions simultaneously

sponsor
bughunt
search
recent
about

@ 2015-02-23T05:21:02Z

<?php

function by_ref(&$ref) {}
by_ref(substr("foo", 1));

Output
Performance
VLD
References
Branches

substr: documentation ( source)

preferences:dark modelive previewkey bindings

128.36 ms | 404 KiB | 5 Q