EnglishIf you're encountering a "Fatal Error: Call to Undefined Function" in WordPress, it means that your code is trying to call a function that doesn't exist or hasn't been defined. Here are steps to troubleshoot and fix this issue:
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Check for Typos:
- Ensure that you've spelled the function name correctly. Even a small typo can lead to this error.
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Check if the Function Exists:
- Verify that the function you're trying to call actually exists. It might be a built-in WordPress function, a function from a plugin, or a custom function that you or someone else has defined.
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Load Necessary Files:
- If the function is defined in a separate file or a plugin, make sure that the file containing the function is properly included or loaded.
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Check for Plugin Conflicts:
- Deactivate all plugins and see if the error persists. If it disappears, reactivate each plugin one by one to identify the one causing the issue.
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Check for Theme Conflicts:
- Switch to a default WordPress theme like Twenty Twenty to see if the error still occurs. If it doesn't, the issue may be related to your current theme.
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Review Recent Changes:
- If this error started occurring after you made changes to your site (like installing a new plugin, updating a theme, etc.), consider reverting those changes to see if it resolves the issue.
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Check for Syntax Errors:
- Review your code for any syntax errors. Even a missing semicolon or bracket can cause this type of error.
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Check PHP Version:
- Ensure that you are using a supported version of PHP. Older versions may not support certain functions.
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Enable Debugging:
- Add the following code to your
wp-config.phpfile to enable WordPress debugging, which may provide more information about the error:
php - Add the following code to your
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define( 'WP_DEBUG', true ); define( 'WP_DEBUG_LOG', true ); define( 'WP_DEBUG_DISPLAY', false );Check the
wp-content/debug.logfile for detailed error messages. -
Reinstall WordPress Core Files:
- Download a fresh copy of WordPress from the official website and replace the core files via FTP or your hosting provider's file manager.
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Contact Plugin or Theme Support:
- If the issue is related to a specific plugin or theme, contact the developer's support team for assistance.
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Contact Hosting Support:
- If none of the above steps work, contact your hosting provider's support. There may be server-level issues causing the problem.
Remember to always back up your site before making any major changes or edits. This way, you can easily restore your site if something goes wrong during troubleshooting.
