composer require autoload code example

Example 1: composer autoload dump

composer dump-autoload

Example 2: composer autoload

require __DIR__ . '/vendor/autoload.php';

$log = new Monolog\Logger('name');
$log->pushHandler(new Monolog\Handler\StreamHandler('app.log', Monolog\Logger::WARNING));
$log->addWarning('Foo');

Example 3: composer don't load class

composer dumpautoload -o

Example 4: php composer update

php composer.phar update

Example 5: composer add package

composer require name-of-package