PHP and MySQL

4.3    Variables

A variable stores a value. This value can be changed in the course of a script, so it is variable, giving the variable its name.

In PHP, all variables begin with the dollar sign ($).[ 31 ] Unlike other programming languages, PHP does not require a variable to be declared the first time it appears. But you must of course assign a value to a variable. This can be done with the equals sign (=), the so-called assignment operator. The following therefore assigns a character string with the content "value" to the variable text.:

$text = "Value";  

4.3.1    Data Types

Strings are always written in quotation marks. However, strings are not the only data types that a variable can accept. PHP also distinguishes between the following data ...