Question

I have a input string:

$str1 = "some usefull text and garbage `~#@!&^*(()}{./";
$str2 = "`~#@!&^*(()}{./";

$result = Exclude with regular expressions all symbols from str1, which are in str2.
$result = "some usefull text and garbage";

What regular expression will simply delete all symbols which I specify? How can I filter it in a right way? Thanx!

Answer 1

You do not need a regular expression for that:

$clean_str = str_replace(str_split($str2), '', $str1);

You may want to trim the resulting string.