How to sanitize php variable efficiently

[mkjame]

I need to find the best way to efficiently sanitize $_POST, $_GET variables by type of variable (if $_POST['email'] then verify if it is really an email, if $_POST['zip']; verify if it's a 5 digits number, etc...)

Any functions to recommend?

Thank you in advance.

[Dormilich]

see PHP Filter functions and PHP Filter @ w3schools