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Symfony 5: The Fast Track is the best book to learn modern Symfony development, from zero to production. +300 pages in full color showing how to combine Symfony with Docker, APIs, queues & async tasks, Webpack, Single-Page Applications, etc.

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The Symfony Polyfill / PHP 7.3 Component

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The Symfony Polyfill / PHP 7.3 Component

This component provides some PHP 7.3 features to applications using earlier PHP versions.

Installation

1
$ composer require symfony/polyfill-php73

Note

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.

Usage

Once this component is installed in your application, you can use the following functions, no matter if your PHP version is earlier than PHP 7.3.

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