PHP Compatibility Index

Is W3 Total Cache compatible with PHP 8?

Version 2.11.0 · 900,000+ active installs · requires PHP 7.4

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

No removed PHP features found in W3 Total Cache 2.11.0. It uses 25 deprecated feature(s) that only log notices today.

PHP 8.0
⚠ 5
PHP 8.1
⚠ 5
PHP 8.2
⚠ 5
PHP 8.3
⚠ 5
PHP 8.4
⚠ 5
PHP 8.5
⚠ 25

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

Check your whole site, not just one plugin. The free PHP Upgrade Check plugin scans every plugin and theme you have installed (including premium and custom ones) and explains each problem. It runs on any host.

Deprecated (works today, logs notices)

File:lineWhat
CdnEngine_Azure_MI_Utility.php:97Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:110Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:199Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:212Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:298Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:311Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:373Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:386Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:456Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:469Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:519Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:532Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:605Function curl_close() is deprecated since PHP 8.5
CdnEngine_Azure_MI_Utility.php:619Function curl_close() is deprecated since PHP 8.5
Util_Http.php:361Function curl_close() is deprecated since PHP 8.5
Util_Mime.php:71Function finfo_close() is deprecated since PHP 8.5
lib/Google/Signer/P12.php:71Function openssl_pkey_free() is deprecated since PHP 8.0
lib/Google/Verifier/Pem.php:49Function openssl_x509_free() is deprecated since PHP 8.0
lib/Minify/Minify/JS/ClosureCompiler.php:104Function curl_close() is deprecated since PHP 8.5
lib/OAuth/W3tcOAuth.php:201Function openssl_free_key() is deprecated since PHP 8.0
lib/OAuth/W3tcOAuth.php:221Function openssl_free_key() is deprecated since PHP 8.0
lib/S3Compatible.php:341Function openssl_free_key() is deprecated since PHP 8.0
lib/S3Compatible.php:1090Function curl_close() is deprecated since PHP 8.5
lib/SNS/lib/requestcore/requestcore.class.php:828Function curl_close() is deprecated since PHP 8.5
lib/SNS/lib/requestcore/requestcore.class.php:919Function 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
lib/Google/Http/REST.php:129Passing the $glue and $pieces parameters in reverse order to implode has been deprecated since PHP 7.4 and is removed since PHP 8.0; $glue should be the first parameter and $pieces the second

Plugin page on WordPress.org: w3-total-cache