Extract words from string with preg_match_all

Question

I\'m not good with regex but i want to use it to extract words from a string.

The words i need should have minimum 4 characters and the provided string can

Answer 1

You can use the regex below for simple strings. It will match any non-whitespace characters with min length = 4.

preg_match_all('/(\S{4,})/i', $str, $m);

Now $m[1] contains the array you want.

Update:

As Gordon said, the pattern will also match the '(20-40)'. The unwanted numbers can be removed using this regex:

preg_match_all('/(\pL{4,})/iu', $str, $m);

But I think it only works if PCRE is compiled with UTF-8 support. See PHP PCRE (regex) doesn't support UTF-8?. It works on my computer though.