var_export
Strings
Function Reference
PHP Manual

# Text Processing

- Strings — String Functions
  - Introduction
  - Installing/Configuring
  - Predefined Constants
  - String Functions
- POSIX Regex — Regular Expression Functions (POSIX Extended)
  - Introduction
  - Installing/Configuring
  - Predefined Constants
  - Examples
  - Regex Functions
- PCRE — Regular Expression Functions (Perl-Compatible)
  - Introduction
  - Installing/Configuring
  - Predefined Constants
  - Examples
  - PCRE Patterns
  - PCRE Functions
- BBCode — BBCode Functions
  - Introduction
  - Installing/Configuring
  - Predefined Constants
  - BBCode Functions

var_export
Strings
Function Reference
PHP Manual