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The Symfony Polyfill / PHP 7.0 Component

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Read the updated version of this page for Symfony 6.1 (the current stable version).

The Symfony Polyfill / PHP 7.0 Component

This component provides some PHP 7.0 features to applications using earlier PHP versions.


$ composer require symfony/polyfill-php70

Alternatively, you can clone the repository.


If you install this component outside of a Symfony application, you must require the 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.

Provided Constants

  • PHP_INT_MIN (value = ~PHP_INT_MAX)
This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.