There are a quite few PHP code check tools you can run on your code to verify it is compatible with the latest PHP version:

  1. PHPCompatibility – PHP version compatibility analyser.
  2. rector – Instant upgrades and instant refactoring of any PHP 5.3+ code (added 2019-09)
  3. Phan – Static analyzer and PHP 7 checker.

How do I know if PHP is 7.4 compatible?

Check if your website is compatible with various PHP versions:

  1. Browse to konsoleH and log in at Admin or Domain level.
  2. If Admin level: Select or search for a domain name in the Hosting Services tab.
  3. Select Manage Services on the left-hand menu.
  4. Below that select Configuration > PHP Config.
  5. Click Run Check Now.

How do I know if PHP 8 is compatible?

PHP 8 compatibility check with these tools

  1. phan – a static analyzer.
  2. phpstan – PHP Static Analysis and compatibility check.
  3. PHP Compatibility checker for PHP_CodeSniffer.
  4. PHP-Parallel-Lint checks syntax of PHP files.
  5. There’s also PHPStorm for developers.
  6. Upgrading doc in the PHP 8’s Github branch.

What is PHP compatibility?

PHPCompatibility is a set of sniffs for PHP_CodeSniffer that checks for PHP version compatibility. It will allow you to analyse your code for compatibility with higher and lower versions of PHP.

How do I install PHP compatibility checker?

Note: If you have WordPress 2.7 or above you can simply go to ‘Plugins’ > ‘Add New’ in the WordPress admin and search for “PHP Compatibility Checker” and install it from there. You will find the plugin options in the WP Admin Tools => PHP Compatibility menu.

What is difference between PHP 7 and PHP 8?

PHP 8 brings a host of new features improvements, functions, and deprecations to the language compared to PHP 7. Among all of these new features, the JIT compiler is the one sharing the limelight. With PHP 8 we should no longer consider that it will be backwards compatible as it has a pack of syntactical changes.

How do I update PHP to 7.4 in WordPress?

cPanel

  1. Login to your hosting cPanel.
  2. Search for PHP version on the top field.
  3. Click on Select PHP version.
  4. Click on the drop-down next to the current PHP version and select the latest one (at the time of writing, 7.4 is the latest one)
  5. Click set as current.

How do I upgrade PHP to 8?

Update PHP Version to PHP 8 In XAMPP On Windows

  1. Step 1 – Open XAMPP Control Panel. Open the XAMPP Control Panel as shown in Fig 1.
  2. Step 2 – Open Apache Config Panel.
  3. Step 3 – Open Config File.
  4. Step 4 – Update PHP Installation Path.
  5. Step 5 – Save Configuration and Start Apache.
  6. Step 6 – Verify PHP.

Which version of PHP should I use for WordPress?

WordPress.org recommends at least PHP 7.4. You may see a warning message in your WordPress dashboard asking you to upgrade PHP if it still uses a version lower than 7.4. You can find steps to upgrade your WordPress version below.

How do I check compatibility version?

You can check compatibility between versions of your Microsoft Office files to see if features in a file are supported by older versions of Office by using Compatibility Checker. Click the File tab, and then click Info. Click Check for Issues, and then click Check Compatibility.

What version of PHP should I use for WordPress?

PHP version 7.4
To run WordPress we recommend your host supports: PHP version 7.4 or greater. MySQL version 5.6 or greater OR MariaDB version 10.1 or greater.