How can constants be defined in a class in PHP?

To define constants in a class in PHP, you can use the `const` keyword followed by the constant name and its value. Constants in a class are defined using the `const` keyword inside the class definition and can be accessed using the `::` scope resolution operator. Constants are useful for defining values that should not change throughout the execution of the program. 

class MyClass {
    const MY_CONSTANT = 10;

    public function getConstantValue() {
        return self::MY_CONSTANT;
    }
}

$myObject = new MyClass();
echo $myObject->getConstantValue(); // Output: 10

Keywords

PHP constants class define syntax

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