# Tokenizer

&reftitle.intro;

The tokenizer functions provide an interface to the PHP tokenizer embedded in the Zend Engine. Using these functions you may write your own PHP source analyzing or modification tools without having to deal with the language specification at the lexical level.

See also the appendix about tokens.

&reference.tokenizer.setup; &reference.tokenizer.constants; &reference.tokenizer.examples; &reference.tokenizer.phptoken; &reference.tokenizer.reference;