Core.LexerImpl TYPE: mixed/null VERSION: 2.0.0 DEFAULT: NULL --DESCRIPTION--

This parameter determines what lexer implementation can be used. The valid values are:

null
Recommended, the lexer implementation will be auto-detected based on your PHP-version and configuration.
string lexer identifier
This is a slim way of manually overridding the implementation. Currently recognized values are: DOMLex (the default PHP5 implementation) and DirectLex (the default PHP4 implementation). Only use this if you know what you are doing: usually, the auto-detection will manage things for cases you aren't even aware of.
object lexer instance
Super-advanced: you can specify your own, custom, implementation that implements the interface defined by HTMLPurifier_Lexer. I may remove this option simply because I don't expect anyone to use it.