PHP TutorialLesson 13Free preview

PHP Constants

This lesson is part of PHP · All levels

Summary

A constant is a fixed value that does not change during the program's run, created by the function define() or the keyword const within the class. Unlike a variable, a constant is not written with a dollar sign. The constant is particularly suitable for configuration values such as application names, API keys, or maximum limits.

Key points

A constant is created by define('NAMA', value) or const within a class
The value of a constant cannot be changed after it is defined
The name of the constant is not preceded by the dollar sign when read
The constant is global in nature so it can be accessed from anywhere in the script.

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