How can debugging techniques be applied to troubleshoot issues with autoloaders in PHP and ensure proper class loading?

To troubleshoot autoloaders in PHP and ensure proper class loading, one can use debugging techniques such as printing out the class paths being loaded, checking for typos in class names, and verifying the autoloader function is correctly registered. By examining the autoload process step by step, one can identify any errors or issues causing classes not to load properly.

// Debugging autoloader to ensure proper class loading
spl_autoload_register(function ($class) {
    $classPath = str_replace('\\', DIRECTORY_SEPARATOR, $class) . '.php';
    echo "Loading class: $classPath\n"; // Print out the class being loaded
    if (file_exists($classPath)) {
        require_once $classPath;
    } else {
        echo "Class file not found: $classPath\n";
    }
});