How to use PHP variables

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How to Create and Use Variables in PHP

PHP is a server-side scripting language that is widely used for web development. Variables in PHP are used to store data and can be accessed and manipulated throughout the script. Creating variables in PHP is quite simple and there are different ways to do it depending on the type of data being stored.

Syntax

The syntax for creating a variable in PHP is as follows:

$variable_name = value;

where $variable_name is the name you give the variable and value is the data that you want to store in the variable. The $ sign in front of the variable name is used to indicate that it is a variable.

Usage Examples

Here are some examples of how variables can be used in PHP:

// Example 1 - Storing a string
$name = "John";
echo "Hello, " . $name;

// Example 2 - Storing a number
$age = 30;
echo "You are " . $age . " years old.";

// Example 3 - Storing an array
$colors = array("red", "green", "blue");
echo "My favourite color is " . $colors[1];

Parameter Values

The following table lists the possible parameter values when creating variables in PHP:

Parameter	Description
Variable Name	The unique name that you give the variable.
Value	The data that you want to store in the variable.

Technical Details

Here are some technical details to keep in mind when working with variables in PHP:

• Variable names are case sensitive.
• Variable names can contain letters, numbers, and underscores.
• Variable names cannot begin with a number.
• There are different variable scopes in PHP (local, global, etc.)

For more information on PHP variables, check out the official documentation.

  Written by: Maria Jensen     23-02-2010     Written in: PHP tutorials