Easily add code snippets in WordPress. Insert header & footer scripts, add PHP code snippets with conditional logic, insert ads pixel code, and more.
- Installs
- 3+ million
- Rating
- 4.9 (1.9K)
- Updated
- 2 days ago
PHP Compatibility Checker
Make sure your plugins and themes are compatible with newer PHP versions.
- Active installs
- 200,000+
- #268 of 1,000
- Downloads, all time
- 3.1M
- 3,074,980
- Downloads, 30 days
- 20.9K
- 4.9K in the last 7
- Rating
- 2.7 / 5
- 131 reviews
- Last updated
- 3 months ago
- Jul 20, 2026
- Version
- 1.6.3
- 29 releases
Upkeep and compatibility
| Last updated | July 20, 2026Updated in the last year |
|---|---|
| Tested up to | WordPress 6.4.14Older than WordPress 7.1.4, the current release |
| Needs WordPress | 5.6 or newer |
| Needs PHP | 5.6 or newer |
| First published | June 29, 2016 |
| Support, last two months | No threads opened |
Reviews
2.7 / 5 from 131 reviews
| 5 stars | 46 |
|---|---|
| 4 stars | 6 |
| 3 stars | 2 |
| 2 stars | 11 |
| 1 star | 66 |
Downloads, last 30 days
What the author says it does
WARNING: PHP Compatibility Checker is no longer actively maintained.
This software is still free to use under the license provided, but users should be aware that it is not currently maintained. No additional releases, including security releases, will be made available.
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 cannot detect unused code-paths that might be used for backwards compatibility, and thus might show false positives. We maintain a whitelist of plugins that can cause false positives. We are continuously working to ensure the checker provides the most accurate results possible.
The opening of the plugin's own description. The full text, installation notes and changelog are on its WordPress.org page.
Questions the author answers
1. Will this work outside of the WP Engine hosting account?
Yes, this plugin can be used any ANY WordPress website on ANY host.
2. Are there WP-CLI commands available?
As of the 1.6.0 release this plugin no longer includes the phpcompat WP-CLI command. If you still require use of that command, then please run version 1.5.2 or older of this plugin as those versions extend WP-CLI and provide commands.
3. A plugin I created is listed as not compatible, what should I do?
We maintain a whitelist of plugins that cause false positives. If your plugin shows up as incompatible but you think that is wrong, please open a GitHub issue on the project, or email [email protected] with info about your plugin and why you know it is compatible (you have automated tests, the failure is on backwards compatibility code paths, etc).
4. Can I use this to test non-WordPress PHP Projects?
Yes! While you cannot use this WordPress plugin to test your non-WordPress projects, you can use the Open Source PHPCompatibility Library that this plugin is built on.
5. Why was my plugin/theme skipped?
If your plugin or theme is not available on WordPress.org, then Tide will not be able to scan or return results of that plugin or theme.
If your plugin or theme is available on WordPress.org, but Tide is not immediately returning results than it likely means Tide has not yet audited that plugin or theme and within a few minutes results should be available once Tide completes its audit.
6. The scan is stuck, what can I do?
As of version 1.6.0 of this plugin, there should no longer be issues of the scan getting stuck as it no longer runs on your WordPress host server. If you are seeing significantly slow or unresponsive results from a plugin or theme that is available on WordPress.org, then please open an issue with those details for the Tide team to investigate why that specific plugin or theme version is not appearing in the Tide…
Latest changelog entry
Fix issue where Buffer was not available to the scans.
Screenshots
Main screen: compatibility checker options 
Compatibility results screen
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Where this page's numbers come from
Read from the WordPress.org plugin API on , when WordPress 7.1.4 was the current release. WordPress.org rounds active installs into buckets. These are the directory's figures, not my verdict, and I haven't tested this plugin.