07 Jul PHP Constants
A constant once defined, cannot be undefined. A valid constant name starts with a letter or underscore (no $ sign before the constant name). PHP constants use the define() function for creating a constant.
Constant name starts with a letter or underscore, but they can’t be considered as a variable, since constant name once defined can’t be changed.
The define() function is used for creating a constant. Here’s the syntax:
define(name, val, case-insensitive)
Here,
- name is the constant name
- val is the value of the constant
- case-insensitive is for constant name insensitive.
The following is an example:
<!DOCTYPE html>
<html>
<body>
<?php
define("RANKING", "ICC Rankings for Team!");
echo RANKING;
?>
</body>
</html>
Here’s the output,
In the above example, we haven’t mentioned the case section, since the default is false. If you want a case-insensitive name, use true i.e
define("RANKING", "ICC Rankings for Team!", true);
echo ranking;
We used the define() function since it is used for creating a constant.
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