The Symfony Polyfill / PHP 7.0 ComponentEdit this page
Warning: You are browsing the documentation for Symfony 4.2, which is no longer maintained.
Read the updated version of this page for Symfony 6.1 (the current stable version).
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.