Is PHP Compatibility Checker free?

Yes, PHP Compatibility Checker is free to use. It is available as a free plugin on WordPress.org.

How many websites use PHP Compatibility Checker?

PHP Compatibility Checker has 200K+ active installations as tracked by WordPress.org.

What are the best PHP Compatibility Checker alternatives?

Popular alternatives to PHP Compatibility Checker include WPCode – Insert Headers and Footers +…, Code Snippets, PHP Code Widget. You can compare them side-by-side on our comparison pages.

Does PHP Compatibility Checker work with the latest WordPress?

PHP Compatibility Checker has been tested up to WordPress 6.4.8. It requires WordPress 5.6+ and PHP 5.6+.

Is PHP Compatibility Checker well supported?

PHP Compatibility Checker has a 0% support resolution rate based on 1 recent support threads on WordPress.org.

PluginSift

PHP Compatibility Checker

Name: PHP Compatibility Checker
Rating: 2.7 (131 reviews)
Author: WP Engine

Make sure your plugins and themes are compatible with newer PHP versions.

By WP Engine·PHP·Free

2.7(131 reviews)

·200K+ active installs·Updated 2 years ago

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As of April 2026, PHP Compatibility Checker is a WordPress php plugin with 200K+ active installations and a 2.7/5 rating from 131 reviews. It has been downloaded 3.0M+ times in total. Requires WordPress 5.6+ and PHP 5.6+. Available on WordPress.org since 2016. Last updated 2 years ago — may have compatibility concerns. Downloads are up 17% this week. Support resolution rate: 0%. Top alternative: WPCode – Insert Headers and Footers +….

2.7/5131 reviews

200K+active installs

0%resolved

10 yearssince 2016

Overview

The WP Engine PHP Compatibility Checker can be used by any WordPress website on any web host to check PHP version compatibility.

This plugin will lint theme and plugin code installed on your WordPress site and give you back a report of compatibility issues as reported by Tide for you to fix. Compatibility issues are categorized into errors and warnings and will list the file and line number of the offending code, as well as the info about why that line of code is incompatible with the chosen version of PHP. The plugin will also suggest updates to themes and plugins, as a new version may offer compatible code.

This plugin does not execute your theme and plugin code, as such this plugin cannot detect runtime compatibility issues.

Please note that linting code is not perfect. This plugin can…

Read full description on WordPress.org

Screenshots

Ratings & Reviews

2.7131 reviews

5 ★

4 ★

3 ★

2 ★

1 ★

Recent Reviews

Con WP5.1 y PHP7.4, falla

by manare·2 months ago

Ell plugin no muestra versiones ni escanea

Why is this recommended by WordPress?

by cweb·6 months ago

Over the years, I have tried to be careful to not install programs that are not kept up to date. Yet, WordPress suggest that we install this outdated app that has not been updated for over 2 years. Many have reported errors. All just to test for the push that WP has for us to upgrade the version of PHP we are using. This doesn’t make sense!

I had tried to put a link to where WP suggest this, but strangely the forums won’t even let me put a link to their own website.

Ironically not compatible with the latest PHP

by aodigitalau·1 year ago

Either update the plugin or take it down.

Rubish, get it offline

by Okoth1·2 years ago

It hangs like many others say. No replies on the forum. You’re giving people false hope.

Just get it offline and focus on your other plugins (which are working very well, btw); you’ll do yourself and many others a favor.

very buggy and hangs

by theozsnowman·2 years ago

ran the plugin on quite a few sites and most timeout after a couple of plugins are tested.

Lots of false positives and errors.

surely there is a better plugin out there?