This is book about PHP and Regular expression and it useful for beginer and advanced php programmers and it cover this topics:
Regular expressions (Meta char.)
Regular expressions (Char. classes)
Regular expressions (Examples)
Escaping HTML
Basic Syntax
Data Types
Predefined PHP variables
Control Structures
Flow of control
Functions
Classes and Objects
Operators
Predefined Apache variables
String Functions
Filesystem Functions
Unified ODBC Functions
Session Handling Functions
Miscellaneous Functions