BrightLeaf Digital

<p>PHP Compatibility Scanner helps you assess whether your site’s code (plugins and themes) is likely to run on newer versions of PHP. It performs static analysis using PHP_CodeSniffer and the PHPCompatibilityWP ruleset to flag code patterns that are incompatible with the selected target PHP version.</p>
<p>What the plugin does (at a glance):<br />
– Compares your current runtime PHP (baseline) to a selected target PHP version (8.0–8.4).<br />
– Scans plugins and themes, then highlights only the new issues that would appear on the target version (the “delta”).<br />
– Shows results in a clear report on the Tools screen and adds small badges on the Plugins list screen.<br />
– Lets you pause, resume, or stop a running scan.</p>
<p>Important limitations of static analysis:<br />
– Static analysis can miss issues in dynamic code paths and can generate false positives. Treat results as guidance, not guarantees. Always test site functionality on a staging environment before upgrading PHP in production.</p>
<h3>Features</h3>
<ul>
<li>Select a target PHP version (8.0, 8.1, 8.2, 8.3, 8.4)</li>
<li>Scan all plugins or select specific ones</li>
<li>Scan all themes or select specific ones, with an option to also scan a parent if a child theme is selected</li>
<li>Pause/Resume/Stop controls for long scans</li>
<li>Clear report of only the new issues between baseline (current runtime) and target</li>
<li>Plugin list badges showing a quick summary for the last scan</li>
</ul>
<h3>Privacy</h3>
<p>All analysis runs locally on your server. No data is sent to external services by this plugin.</p>


BrightLeaf Digital PHP Compatibility Scanner

This plugin scans your installed plugins and themes for potential PHP compatibility issues when upgrading to newer PHP versions.

kaggdesign

<p><a href="https://make.wordpress.org/core/handbook/references/php-compatibility-and-wordpress-versions/" rel="nofollow ugc">WordPress is not fully compatible with PHP 8.0 – 8.4</a>. Remaining known PHP 8.0+ issues are deprecation notices.</p>
<p>The same is related to many popular plugins such as WooCommerce, Jetpack, Gravity Forms and others. Mainly, they produce deprecation notices from the Action Scheduler library.</p>
<h4>Features</h4>
<ul>
<li>The plugin blocks deprecation notices, user deprecation notices, notices, warnings, user notices, and user warnings.</li>
<li>The list of folders from which errors are blocked can be filtered. This list may specify any WordPress Core, plugin and theme folders.</li>
<li>Plugin filters out errors from these folders only. Errors produced by other code are not blocked, which helps in debugging user code.</li>
<li>During activation, plugin installs a mu-plugin <code>kagg-compatibility-error-handler.php</code> into the <code>/wp-content/mu-plugins/</code> folder. It contains the error handler, which loads earlier than any plugin or theme.</li>
</ul>
<h3>Plugin Support</h3>
<ul>
<li><a href="https://wordpress.org/support/plugin/kagg-compatibility/" rel="ugc">Support Forum</a></li>
</ul>


KAGG Compatibility

A great plugin that solves a lot of headaches when switching to php8.1

Very helpful from php8.1


Almost all major plugins were not ready to switch to php 8.1: Yoast SEO, Rank Math, Mail Poet, etc. You get a bunch of warnings about deprecation. This plugin allows you to solve this problem by simply enabling it. Simple, fast, comfortable


Great plugin

The plugin blocks error messages of any level from WordPress core, plugins, and themes.

BrightLeaf Digital PHP Compatibility Scanner vs KAGG Compatibility