PHP Class Constants: Tutorial with Code Examples (2023)
What is a PHP Class Constant? PHP class constant is a value defined within a class and cannot be changed during the execution of the script. They are similar to variables, but unlike variables, their value remains constant throughout the script execution. In object-oriented programming, class constants are used to define data that belongs to a class rather than a specific instance of a class. They offer several advantages, such as better code readability and centralized data management. PHP Class Constant Code Example <?php class Math { public const PI = 3.14159265359; public static function areaOfCircle($radius) { return self::PI * $radius * $radius; } public static function circumferenceOfCircle($radius) { return 2 * self::PI * $radius; } } echo Math::areaOfCircle(5); // Output: 78.539816339744 echo Math::circumferenceOfCircle(5); // Output: 31.4159265358979 ?> Article Highlights Class constants are immutable values that are associated with a specific class in PHP. Class constants are declared using the…