<?php

function getMethodName(&$methodName) {
    $methodName = Abc::METHOD_NAME;
}

class Abc {
    const METHOD_NAME = "goal";

    private static function goal() {
        echo "success\n";
    }

    public static function run() {
        $method = "foobar";
        getMethodName($method);
        var_dump(is_callable("Abc::$method"));
        self::$method();
    }
}

Abc::run();

?>