List of Function Aliases
List of Keywords
Appendices
PHP Manual

# List of Reserved Words

## Table of Contents

- List of Keywords
- Predefined Classes
- Predefined Constants

The following is a listing of predefined identifiers in PHP. None of the identifiers listed here should be used as identifiers in any of your scripts. These lists include keywords and predefined variable, constant, and class names. These lists are neither exhaustive or complete.

List of Function Aliases
List of Keywords
Appendices
PHP Manual