How to replace characters in URL?

Question

PHP

Good afternoon.
How to replace characters from ",," to ".." in URL?
for example, the form:
site.rf / section,,
to
site.rf / section ..
Need to replace two commas with two dots? How to do it and where?

Answer 1

$content = preg_replace("/,,/ism", "..", $content);

Answer 2

$url = str_replace(',,', '..', $url);