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infoWordPress Core•memorymemory_limitdangerousfatal_errorcodephp_errorfunctionsundefined_function•labelCommon•warningModerate

The site is experiencing a critical error

The site shows a fatal PHP error that stops WordPress from loading. The error appears when a plugin, theme, core file, or server setting triggers a fatal condition such as a missing function, memory exhaustion, or syntax problem.

WordPress stops execution and displays a generic message to protect visitors. The underlying cause resides in code or environment that cannot be processed by the PHP runtime.

Symptoms

[dashicons-warning]
Blank screen
The front end shows only a white page with no content.
[dashicons-admin-site]
Critical error notice
WordPress displays “There has been a critical error on this website.”
[dashicons-admin-tools]
500 Internal Server Error
Browser reports a 500 status code for the request.
[dashicons-email]
Recovery mode email
Admin receives an email with a link to recovery mode and file details.

Common Causes

Incompatible plugin
A newly installed or updated plugin uses deprecated functions or conflicts with other code.
Theme conflict
A theme or child theme contains syntax errors or outdated code.
Corrupt core files
WordPress core files are missing or altered during an incomplete update.
PHP memory limit exhausted
A script exceeds the memory limit defined in php.ini or .htaccess.
Server configuration error
Mis‑configured .htaccess, missing PHP extensions, or wrong PHP version.
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