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.
No se necesitan bibliotecas externas para construir esta extensión
Beginning with PHP 4.3.0 these functions are enabled by default. For older versions you have to configure and compile PHP with --enable-tokenizer. You can disable tokenizer support with --disable-tokenizer.
La versión para Windows de PHP tiene soporte nativo para esta extensión. No se necesita cargar ninguna extensión adicional para usar estas funciones.
Nota: Builtin support for tokenizer is available with PHP 4.3.0.
When the extension has either been compiled into PHP or dynamically loaded at runtime, the tokens listed in Apéndice Q are defined as constants.
Here is a simple example PHP scripts using the tokenizer that will read in a PHP file, strip all comments from the source and print the pure code only.