How to use defined in PHP
In this article I will explain how defined Function can be used in PHP.
defined() Function
This function checks whether a constant exists.
Returns TRUE if the constant exists, or FALSE otherwise.
Syntax
| Parameter |
Description |
| name |
Required. Specifies the name of the constant to check |
Example
<html>
<body>
<?php
define("GREETING","Hello you! How are you today?");
echo defined("GREETING");
?>
</body>
</html> |
Output
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