Question

I’m working on a word censor.
I have this text :

$str = "Je connais ce con de conémi".

I want to replace “con” if it’s a whole word, not in a another one.

If I do this :

preg_replace("/\b(con)\b/i", "###", $str);

the result is :

"Je connais ce ### de ###émi".

Conémi has been censored.
This is because of the “é” of conémi.

Answer 1

Just add u regex modifier

preg_replace("/\b(con)\b/iu", "###", $str)
                          ^--- here it is

or alternative solution is to use PCRE unicode characters:

preg_replace("/(?<=\p{Z}|\p{P}|^)con(?=\p{Z}|\p{P}|$)/i", "###", $str);

http://ideone.com/cCoiNp