Constants are used to to declare the default or constant information that can be used in the program. To create the constant we use the define() function.
• name: The name of the constant. • value: The value or information that we want to store into the constant. • case-insensitive: Here we will mention the name of constant is case sensitive or not.It may be true or false The default value of the case-insensitive is false. It means we can pass two parameters and third parameter is optional. ⇨ true: The case-sensitive is now followed. ⇨ false: The case-sensitive is now ignored.
<?php define("LOGINSUCCESS", "You have successfully Logged ! ","true"); echo LOGINSUCCESS; ?>
<?php define("LOGINSUCCESS", "You have successfully Logged ! ","false"); echo LoginSuccess; ?>