php remove string: fa fa-phone famouse

问题

I want to remove the strings fa and fa-phone of the string: "fa famouse fa-phone".

I tried:

preg_replace('/fa.+$/','', 'fa famouse fa-phone');

But now it removes all strings with fa.

回答1:

preg_replace('/fa[ \-](phone)?/','','fa famouse fa-phone');

Regex: https://regex101.com/r/bJ3nE7/1

---

fa (literal)
[ \-] match a space or a hyphen
(phone)? match the literal 'phone' 0 or 1 times

回答2:

So i want to remove the string fa and all the strings a beginning with fa-
But not other strings that contain fa like famouse for example.

Here is a way to do the job:

echo preg_replace('/fa(?:-[-\w]+|\b)/', '', 'fa famouse fa-phone-small fabrics fantastic'),"\n";

Output:

famouse  fabrics  fantastic

来源：https://stackoverflow.com/questions/28751418/php-remove-string-fa-fa-phone-famouse