Title: PHP error, Undefined array key 1
Last modified: April 11, 2025

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# PHP error, Undefined array key 1

 *  Resolved [Diiamo](https://wordpress.org/support/users/luislu/)
 * (@luislu)
 * [1 year, 1 month ago](https://wordpress.org/support/topic/php-error-undefined-array-key-1/)
 * Hi, there is some error on my site, is this normal?
 * 2025/04/11 20:51:06 [error] 16968#0: *140562 FastCGI sent in stderr: ＂PHP message:
   PHP Warning: Undefined array key 1 in /www/wwwroot/xxx.tech/wp-content/plugins/
   wp-cloudflare-page-cache/libs/cache_controller.class.php on line 2640PHP message:
   PHP Warning: Undefined array key 1 in /www/wwwroot/xxx.tech/wp-content/plugins/
   wp-cloudflare-page-cache/libs/cache_controller.class.php on line 2641＂ while
   reading response header from upstream, client: 80.246.226.35, server: xxx.cc,
   request: ＂POST /wp-admin/update.php?action=upload-plugin HTTP/2.0＂, upstream:＂
   fastcgi://unix:/tmp/php-cgi-81.sock:＂, host: ＂xxx.cc＂, referrer: ＂https://
   xxx.cc/wp-admin/plugin-install.php＂

Viewing 1 replies (of 1 total)

 *  Plugin Support [Kush](https://wordpress.org/support/users/kushnamdev/)
 * (@kushnamdev)
 * [1 year, 1 month ago](https://wordpress.org/support/topic/php-error-undefined-array-key-1/#post-18414471)
 * Hi [@luislu](https://wordpress.org/support/users/luislu/),
 * Thank you for reaching out.
 * Yes, this is a **PHP warning**, not a fatal error, so it’s considered **harmless**
   in WordPress terms. Warnings like these typically indicate a minor issue in the
   code logic (in this case, an undefined array key), but they do **not affect the
   functionality** of your website or cause it to break.
 * Unless you’re experiencing visible issues on the front end or in the admin area,
   this warning can be safely ignored.
 * Let us know if you need any additional assistance.
 * Best regards,

Viewing 1 replies (of 1 total)

The topic ‘PHP error, Undefined array key 1’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [Kush](https://wordpress.org/support/users/kushnamdev/)
 * Last activity: [1 year, 1 month ago](https://wordpress.org/support/topic/php-error-undefined-array-key-1/#post-18414471)
 * Status: resolved