Can constants in PHP classes be assigned values through functions or methods?

Constants in PHP classes cannot be assigned values through functions or methods. Constants are meant to be set once and remain unchanged throughout the execution of the program. If you need a value that can be changed during the program's execution, you should use class properties instead.

class MyClass {
    const MY_CONSTANT = 10;

    public $myProperty = 20;

    public function setProperty($value) {
        $this->myProperty = $value;
    }
}

$obj = new MyClass();
$obj->setProperty(30);
echo $obj->myProperty; // Output: 30