In this tutorial you will understand the concept of PHP Constants
- A constant is an identifier (name) for a simple value. The value cannot be changed during the script.
A valid constant name starts with a letter or underscore (no $ sign before the constant name).
Note:Â Unlike variables, constants are automatically global across the entire script.
How to create PHP constants:
define(name, value, case-insensitive)
Parameters:
- name: Specifies the name of the constant
- value: Specifies the value of the constant
- case-insensitive: Specifies whether the constant name should be case-insensitive. Default is false
Example:
| 1 2 3 4 | <?php define("url", "tutsocean.com"); echo "URL of this website is: ".url; ?> |
Note:Â Constants are automatically global and can be used across the entire script.
Example:
| 1 2 3 4 5 6 7 8 9 10 11 12 | <?php define("url", "tutsocean.com"); //define the function f1() function f1() { echo "URL of this website is: ".url; } //call the function f1() f1(); ?> |
This is a simple and effective tutorial of creating PHP Constants. If you have any question, ask it at our Forum Section.
