vendor/symfony/symfony/src/Symfony/Component/Debug/DebugClassLoader.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Debug;

/**
 * Autoloader checking if the class is really defined in the file found.
 *
 * The ClassLoader will wrap all registered autoloaders
 * and will throw an exception if a file is found but does
 * not declare the class.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Christophe Coevoet <stof@notk.org>
 * @author Nicolas Grekas <p@tchwork.com>
 */
class DebugClassLoader
{
    private $classLoader;
    private $isFinder;
    private $wasFinder;
    private static $caseCheck;
    private static $deprecated = array();
    private static $php7Reserved = array('int', 'float', 'bool', 'string', 'true', 'false', 'null');
    private static $darwinCache = array('/' => array('/', array()));

    /**
     * Constructor.
     *
     * @param callable|object $classLoader Passing an object is @deprecated since version 2.5 and support for it will be removed in 3.0
     */
    public function __construct($classLoader)
    {
        $this->wasFinder = is_object($classLoader) && method_exists($classLoader, 'findFile');

        if ($this->wasFinder) {
            @trigger_error('The '.__METHOD__.' method will no longer support receiving an object into its $classLoader argument in 3.0.', E_USER_DEPRECATED);
            $this->classLoader = array($classLoader, 'loadClass');
            $this->isFinder = true;
        } else {
            $this->classLoader = $classLoader;
            $this->isFinder = is_array($classLoader) && method_exists($classLoader[0], 'findFile');
        }

        if (!isset(self::$caseCheck)) {
            $file = file_exists(__FILE__) ? __FILE__ : rtrim(realpath('.'), DIRECTORY_SEPARATOR);
            $i = strrpos($file, DIRECTORY_SEPARATOR);
            $dir = substr($file, 0, 1 + $i);
            $file = substr($file, 1 + $i);
            $test = strtoupper($file) === $file ? strtolower($file) : strtoupper($file);
            $test = realpath($dir.$test);