//composer.json file { "require": { "monolog/monolog": "1.0.*" } }
composer install
// Autoloading function function autoload($className) { $path = __DIR__ . '/classes/' . $className . '.php'; if (file_exists($path)) { require_once $path; } } // Register the autoloader function spl_autoload_register('autoload');In this example, the autoload function takes the classname and loads it from the classes directory. The spl_autoload_register function registers the autoloader function with PHP. Whenever a class is referenced in the code, the autoloader function will be called to load the class. Package library: In Example 1, Composer is the package library used to manage dependencies and autoload classes in the PHP application. In Example 2, there is no package library used as we are manually autoloading classes from a specific directory.