PHP 5 Constants

PHP 5 Constants

PHP 5 Constants

Constants are like variables except that once they are defined they cannot be changed or undefined.

PHP Constants

A constant is an identifier (name) for a simple value. The value cannot be changed during the script.

A valid constant name starts with a letter or underscore (no $ sign before the constant name).

Create a PHP Constant

To create a constant, use the define() function.

Syntax

define(namevaluecase-insensitive)

Parameters:

  • name: Specifies the name of the constant
  • value: Specifies the value of the constant
  • case-insensitive: Specifies whether the constant name should be case-insensitive. Default is false

The example below creates a constant with a case-sensitive name:

Example

<?php
define(“GREETING”, “Welcome to mkitweb.com!”);
echo GREETING;
?>
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Post Author: aamirkhan

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