Warning: You are browsing the documentation for version 4.2 which is not maintained anymore.
If some of your projects are still using this version, consider upgrading.
Table of Contents
This component provides some PHP 7.0 features to applications using earlier PHP versions.
$ composer require symfony/polyfill-php70
If you install this component outside of a Symfony application, you must
vendor/autoload.php file in your code to enable the class
autoloading mechanism provided by Composer. Read
this article for more details.
Once this component is installed in your application, you can use the following constants, classes and functions, no matter if your PHP version is earlier than PHP 7.0.