PHP Compatibility Index

Is GTmetrix for WordPress compatible with PHP 8?

Version 0.4.8 · 7,000+ active installs

Works on PHP 8.0–8.5, with deprecation notices from 8.5

No removed PHP features found in GTmetrix for WordPress 0.4.8. It uses 2 deprecated feature(s) that only log notices today.

PHP 8.0
✓
PHP 8.1
✓
PHP 8.2
✓
PHP 8.3
✓
PHP 8.4
✓
PHP 8.5
⚠ 2

✓ no problems · ⚠ deprecation notices only (still works) · ✗ uses something removed in that PHP version

Not updated for 3.2 years. Nobody seems to maintain this plugin, so problems found here are unlikely to be fixed. If your site uses it, look for a maintained alternative before upgrading PHP.
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Deprecated (works today, logs notices)

File:lineWhat
lib/Services_WTF_Test.php:118Function curl_close() is deprecated since PHP 8.5
lib/Services_WTF_Test.php:442Function curl_close() is deprecated since PHP 8.5

Removed long ago or protected by a check (code that most likely never runs on PHP 8)

File:lineWhat
gtmetrix-for-wordpress.php:279Function create_function() is deprecated since PHP 7.2 and removed since PHP 8.0; Use an anonymous function instead

Plugin page on WordPress.org: gtmetrix-for-wordpress