Regular expressions: Examples

Test variable for string	if ($data =~/<!-- Content -->/){$x++;}
This removes various items based on letter combinations in a pdf title	if ($item !~ /^d\|de\.pdf$\|de(..)\.pdf$/i){
Remove all HTML	$html =~ s/<[^>]+>//g;
Force all letters to lowercase	$html =~ tr/A-Z/a-z/;
Count the letters in a word	@chars = split //,$word;
Count the words in a sentance	@words = split /\s+/, $line;
Removes spaces and non-alpha	$line =~ s/\W//g;
Strip or clean html code in a regular expression. Taken from a newsgroup	$context =~ s/<(?:[^>'"]\|(['"]).?\1)*>//gs;