PHPLint is a validator and documentator for PHP 4 and PHP 5 programs developped by Umberto Salsi. PHPLint extends the PHP language through transparent meta-code that can drive the parser to a even more strict check of the source. PHPLint is not simply a checker: it implements a new, strong typed, language implemented over the PHP language. You can build your programs from scratch with PHPLint in mind, or you can check and fix existing programs, or you can follow the quick-and-dirty PHP programming way and then add the PHPLint meta-code later once the program is finished. Whatever is the strategy you choose, PHPLint can improve your programming work.