How to fix critical errors reported by site health

"Serious errors" in website health checks must be fixed immediately to avoid affecting operation or safety. The core of the solution is to clarify the content of the error, understand its importance and handle it in an orderly manner. Common types and response methods are as follows: 1. The "redirection loop" problem should check whether the .htaccess file configuration, fixed link settings, cache plug-in or CDN conflicts, and confirm that the domain name and HTTPS settings are correct; 2. The PHP version is too old and needs to be upgraded to 8.0 or higher, backup and test compatibility before switching, and contact the developer in time or find alternatives if there is any problem; 3. When the plug-in or theme is incompatible, the recently updated or installed plug-in should be disabled, or the plug-in folder renamed through FTP is deactivated. The theme problem can be temporarily switched to the default theme troubleshooting, and periodically update or replace plug-ins and themes that are no longer maintained; 4. If the database connection fails, check whether the database information in wp-config.php is correct, use the tool to manually connect to confirm the service status, and repair the table structure or contact the hosting provider to troubleshoot if necessary.

A "critical error" in a website health check report usually means that there are issues on your WordPress site that must be fixed immediately, otherwise it may affect the proper functioning or security of the site. This type of error is not a warning or a suggestion, but an item that must be handled.

The core of solving these problems is to figure out what the error is, understand why it is important, and then fix it in an orderly manner . Here are some common types and coping methods.

1. How to solve the problem of "redirection loop"?

If you see a prompt like "Too many redirects" or "too many redirects", this is usually due to inappropriate configuration that makes the browser unable to load the page.

• Check that your .htaccess file is set up correctly (especially if you are using an Apache server).
• Log in to the background to see if the permalink settings are normal and try to save the permalink again.
• Check if the cache plug-in or CDN is enabled, and sometimes they cache the wrong redirect rules.
• If you have recently changed your domain name or enabled HTTPS, you need to confirm that the website address settings (WordPress address and site address) are consistent and correct.

In most cases, such problems are caused by configuration conflicts, so check them one by one.

2. What should I do if the PHP version is too old?

Many hosting service providers install PHP versions by default are older, while WordPress recommends using PHP 8.0 or higher. The lower version of PHP not only has poor performance, but may also have safety risks.

• Log in to the host control panel (such as cPanel), find the PHP settings options, and select the latest stable version.
• It is recommended to make a backup before switching and check whether the currently used themes and plug-ins are compatible with the new version.
• If you are not sure, you can try upgrading in the test environment first.

If a white screen or an error occurs after switching, it means that some plug-ins or themes are incompatible. At this time, you need to contact the developer or find an alternative.

3. Plug-in or theme is incompatible with the current environment

A critical error will be triggered when a plug-in or theme fails to function properly, such as calling a non-existent function or relying on an abandoned function.

• Go to the WordPress Backend > Plugins page to disable the recently updated or installed plugins.
• If you cannot enter the background, you can enter /wp-content/plugins/ through FTP or file manager to temporarily deactivate the plug-in folder that is suspected to be in trouble.
• For topic issues, you can temporarily switch back to the default topic (such as Twenty Twenty-Four) for troubleshooting.

It is recommended to update all plug-ins and themes regularly, especially those old plug-ins that are no longer maintained, and it is safer to replace them as soon as possible.

4. How to fix the database connection failure?

A database connection error will make the entire website inaccessible, which may be a change in the database information, a loss of permissions, or a corruption of the database itself.

• Check whether the database username, password, host, and database names in wp-config.php are correct.
• Use phpMyAdmin or other tools to try to manually connect to the database to confirm whether the database service is running normally.
• If the database crashes, you can use the repair function to try to restore the table structure.

This situation is sometimes caused by temporary failure of the hosting provider, but the possibility of configuration errors or data corruption cannot be ignored.

Basically, these common types of serious errors and fix ideas. Although specific problems may change rapidly, most of them can be solved by checking them step by step. The key is not to panic, see the error prompts clearly, and then prescribe the right medicine.

The above is the detailed content of How to fix critical errors reported by site health. For more information, please follow other related articles on the PHP Chinese website!