How To Upgrade To Php 7.4

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Upgrading to PHP 7.4: A First-Person Perspective

As a web developer who has been working with PHP for several years, I have always been keen on staying up-to-date with the latest versions of the language. When PHP 7.4 was released, I immediately jumped at the opportunity to upgrade my projects. In this article, I will share my personal experience and provide a comprehensive guide on how to upgrade to PHP 7.4.

Why Upgrade to PHP 7.4?

Before diving into the upgrade process, let’s take a moment to understand why upgrading to PHP 7.4 is a wise decision. PHP 7.4 brings an array of new features and performance improvements over its predecessors. With PHP 7.4, you can benefit from:

  • The introduction of arrow functions, making the code more concise and readable.
  • Typed properties, allowing for stricter type checking within classes.
  • Improved error handling with the introduction of the “??=” null coalescing assignment operator.
  • Performance optimizations and memory usage improvements.

Considering these advantages, it’s clear that upgrading to PHP 7.4 is a worthwhile investment. Now, let’s move on to the upgrade process itself.

Step-by-Step Upgrade Guide

Step 1: Check Compatibility

Before proceeding with the upgrade, it is crucial to ensure that your codebase and dependencies are compatible with PHP 7.4. Some older code and libraries may require modifications to work correctly with the latest version. To check compatibility, you can use tools like PHP Compatibility Analyzer or review the official PHP 7.4 migration guide.

Step 2: Backup Your Projects

It’s always a good practice to create backups of your projects before making any major changes. This allows you to revert to the previous version in case of any unforeseen issues during the upgrade process. Make sure to back up both your source code and your database.

Step 3: Update PHP Version

To upgrade to PHP 7.4, you need to first update the PHP version on your server. The process may vary depending on your hosting environment, so it’s best to refer to your hosting provider’s documentation or seek assistance from their support team. If you’re using a local development environment, you can update PHP using a package manager or by downloading and installing the latest version manually.

Step 4: Test Your Code

After updating PHP to version 7.4, it’s crucial to thoroughly test your codebase. Pay close attention to any deprecated features or functions that may have been removed or modified in PHP 7.4. Run your unit tests, perform integration testing, and ensure that your application functions as expected with the new PHP version.

Step 5: Address Compatibility Issues

If you encounter any compatibility issues during the testing phase, it’s essential to address them promptly. Update any deprecated features, refactor code, or update dependencies that may cause conflicts with PHP 7.4. This step may require some development effort, but it’s necessary to ensure your application runs smoothly with the latest PHP version.

Step 6: Optimize Your Code

Once you have resolved any compatibility issues, take the opportunity to optimize your code. Leverage the new features and improvements in PHP 7.4 to enhance your application’s performance and maintainability. Rewrite any inefficient code, leverage typed properties, and make use of the new language features to improve the overall quality of your codebase.


Upgrading to PHP 7.4 is an exciting journey that brings numerous benefits to your web development projects. By following the step-by-step guide outlined in this article, you can ensure a smooth and successful upgrade process. Remember to check compatibility, create backups, test your code, address any compatibility issues, and optimize your code. Embrace the new features and performance improvements that PHP 7.4 has to offer, and take your PHP development to new heights.