CODEWITHSUNDEEP
phpregex
Chris Barcroft
Chris Barcroft

Reputation: 572

Preg_replace non-alphanumerics and special characters

I'm attempting to use preg_replace to remove any characters in a string that fall outside the specified whitelist. The whitelist should contain all alphanumerics and common punctuation, as well as spaces and the following: ² ¹ º ° © ½ ¼ ¾ ® ™

I attempted to use the following to accomplish this:

preg_replace("/[^[:alnum:][:punct:] ²¹º°©½¼¾®™]/","", $string);

However, this removes everything on the string that comes after an illegal character, instead of removing ONLY the illegal characters. It works as desired if I only use the alnum, punct, and space character, so I think the problem lies with the special characters at the end - but I am having trouble figuring out how to include them properly.

Example:

"test test ₣ test test" becomes "test test ", but I want it to become "test test test test"

Upvotes: 2

Views: 213

Answers (1)

hwnd
hwnd

Reputation: 70732

You want to use the u (unicode) modifier. 

$str = preg_replace('/[^[:alnum:][:punct:] ²¹º°©½¼¾®™]/u', '', $str);

Upvotes: 3

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