Question

I’m trying to use MapClassLoader in autoload.php but for some reason I keep getting errors saying

Class 'Symfony\Component\ClassLoader\MapClassLoader' not found in ...\autoload.php

autoload.php:

<?php

use Symfony\Component\ClassLoader\UniversalClassLoader;
use Symfony\Component\ClassLoader\MapClassLoader;
use Doctrine\Common\Annotations\AnnotationRegistry;

$loader = new UniversalClassLoader();
$loader->registerNamespaces(array(
    //some values
));

$mapLoader = new MapClassLoader(array(
    //some values
));

$mapLoader->register();

I double checked and MapClassLoader.php does exist in Symfony\Component\ClassLoader

Any idea why is it happening? :/

Answer 1

autoload.php is a file that configures autoloading for classes so autoloading isn’t available in it and you need to include any files manually:

require_once __DIR__.'/../vendor/symfony/src/Symfony/ClassLoader/MapClassLoader.php';

Why is UniversalClassLoader available without require? Because symfony uses bootstrap file for system files to reduce file loading overhead.