best way to create/split string to tags

Question

In my php application user able to enter the tags(like here while ask question). I assume it will be regexp, and I used one - mb_split('\W+', $text) - to split by non-word characters.

But I want to allow users to enter characters like "-,_,+,#" etc which are valid ones to be in url and are common.

Is there exiting solutions for this, or may be best practicles?

thanks.

Answer 1

Use the explode() function and separate by either spaces or commas. Example:

$string = 'tag1 tag-2 tag#3';
$tags = explode(' ', $string); //Tags will be an array

Answer 2

Split by whitespace \s+ instead.

Answer 3

Split on \s+ (whitespace) instead of \W+ (non-alphanumeric).