Get value of dynamically chosen class constant in PHP

Question

I would like to be able to do something like this:

class ThingIDs
{
    const Something = 1;
    const AnotherThing = 2;
}

$thing = \'Something\';
$id = Thi         


        

Answer 1

I know I'm a bit late, but I hope this can help anyway.

Based on Phil's answer, I created a default enumerator class that can be extended.

class DefaultEnum
{
    static public function getConstantText(string $constant)
    {
        try {
            // Get child class name that called this method
            $child_class = get_called_class();

            $reflection = new ReflectionClass($child_class);
            $const = $reflection->getConstant($constant);

            return $const;
        } catch (\ReflectionException $e) {
            // ...
        }
    }
}

class CustomEnum extends DefaultEnum
{
    const something = 'abcd';
    const something2 = 'ABCD';
}

You can call this method like this

CustomEnum::getConstantText('something');

It will return 'abcd'.

The function get_called_class() is a function that returns the class name that called this method and it works specifically for static methods.

In this case $child_class value will be CustomEnum::class. ReflectionClass accepts strings and object as parameter.