Patterns for prep_match

If you understand the title, then hurray) I am interested in the design of patterns for regular expressed preg_match. It is preferably the whole manual about what i u , etc. In short, who knows, he understood me. Links on topics, manuals and other … Language is desirable Russian and English) Well, German is also pulling)

p.s. True, before himself ashamed. And I feel self-taught, I want more)

Answer 1, Authority 100%

Pattern syntax in the docks on Offsay PHP.
In Russian 🙂