Define php variables

- Define php variables with examples
- Php define multiple variables at once
- Php define global variables
- Php define multiple variables
- Php define variables in class
- Define php environment variables
- Php define_syslog_variables
- Define_syslog_variables php 5.3
- Define member variables php
- Define_syslog_variables php 5.4
- Defined php
- Php variables
- Var php
- Php declare
- Undefined variable in php