W elcome to PHPBash. In this PHP Tutorial, we will learn about Basics of PHP Constants.  In our Previous Tutorial , we learn about different concepts related to PHP variables. A constant is a name or an identifier with a fixed or permanent value. In Programming, Both constants and variables are used for storing data or values and act as container. Constants are more like variables with one difference that, Constants can not be modified/Changed during execution of program.  PHP Constants In this, PHP tutorial covers all the topics of Basics of PHP Constants  like         1.  PHP Constants         2.  Using the PHP define() method.         3.  Using the PHP const keyword.         4.  PHP 7 Constant Arrays         5.  PHP Global Constants         6.  PHP constant() Function          7. PH...