OOP in PHP: Class-function from a variable?

Question

Is it possible to call functions from class like this:

$class = new class;
$function_name = \"do_the_thing\";
$req = $class->$function_name();

Answer 1

You can use ReflectionClass.

Example:

$functionName = 'myMethod';
$myClass = new MyClass();
$reflectionMyMethod = (new ReflectionClass($myClass))->getMethod($functionName);

$relectionMyMethod->invoke($myClass); // same as $myClass->myMethod();

Remember to catch ReflectionException If Method Not Exist.