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Defining a constant in PHP can come in handy when working with a value that will be used throughout your script. What is a constant exactly? According to PHP.net, “A constant is an identifier (name) for a simple value“. One important thing you need to know is that, like its name states, a constant cannot be changed. That is pretty much the main difference between a constant and a variable.
Here is a basic example:
|<?php define("SITE","bavotasan.com"); define("AUTHOR","c.bavota"); echo SITE // outputs bavotasan.com echo AUTHOR // outputs c.bavota echo SITE." by ".AUTHOR // outputs bavotasan.com by c.bavota?>|
Simple enough. Just remember that constants are case sensitive, so this wouldn’t work:
|<?php echo Site;?>|
Unless, of course, you set a third parameter within the
define() function to control the case. By default, it is set to
false, which is case-sensitive. To make it case-insensitive, all you need to do is set that third parameter to
Please let me know if you nea case for torture by michale levined any clarification. I'm always happy to answer your questions.
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