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Informations about the package phpcompatibility-wp

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Using PHPCompatibilityWP, you can analyse the codebase of a WordPress-based project for PHP cross-version compatibility.

What's in this repo ?

A ruleset for PHP_CodeSniffer to check for PHP cross-version compatibility issues in projects based on the WordPress CMS.

This WordPress specific ruleset prevents false positives from the PHPCompatibility standard by excluding back-fills and poly-fills which are provided by WordPress.


Installation instructions

The only supported installation method is via Composer.

If you don't have a Composer plugin installed to manage the installed_paths setting for PHP_CodeSniffer, run the following from the command-line:

If you already have a Composer PHP_CodeSniffer plugin installed, run:

Next, run:

If all went well, you will now see that the PHPCompatibility, PHPCompatibilityWP and some more PHPCompatibility standards are installed for PHP_CodeSniffer.

How to use

Now you can use the following command to inspect your code:

By default, you will only receive notifications about deprecated and/or removed PHP features.

To get the most out of the PHPCompatibilityWP standard, you should specify a testVersion to check against. That will enable the checks for both deprecated/removed PHP features as well as the detection of code using new PHP features.

The minimum PHP requirement of the WordPress project up to WP 5.1 was 5.2.4. As of WP 5.2 it will be PHP 5.6.20. If you want to enforce this, either add --runtime-set testVersion 5.6- to your command-line command or add <config name="testVersion" value="5.6-"/> to your custom ruleset.

For example:

For more detailed information about setting the testVersion, see the README of the generic PHPCompatibility standard.

Testing PHP files only

By default PHP_CodeSniffer will analyse PHP, JavaScript and CSS files. As the PHPCompatibility sniffs only target PHP code, you can make the run slightly faster by telling PHP_CodeSniffer to only check PHP files, like so:


All code within the PHPCompatibility organisation is released under the GNU Lesser General Public License (LGPL). For more information, visit


2.1.0 - 2019-08-29

2.0.0 - 2018-10-07

1.0.0 - 2018-07-17

Initial release of the PHPCompatibilityWP ruleset.


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