White space

correctly handle the case where the value is splitted on multiple lines.

A powerful regex (fewest steps possible) which gives you all the information about urls.

Fully qualified domain name validation

Takes any valid CSS and minimizes it, removing comments and whitespace. Can be called with something like PHP's preg_replace() to dynamically minimize css files.

Start with capital letter. Allowed special characters '(Apostrophe) -(hyphen) .(dot) (space) and can not end with -(Hyphen)

Dovrebbe beccare anche eventuali caratteri '' (due apici singoli)

www.4shared.com

AttributeConnID 45524524355

Useful for filename sanitization. Matches invalid filename characters. Can be used in preg_replace() calls.

This is for telephone pattern +1 123-123-1234