php删除字符串：fa fa-phone着名

Question

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.

Answer 1

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

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

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