Call to undefined function wp_mail in my plugin

The infamous wp_mail undefined function error!

wp_mail is a WordPress function that sends emails, and it's usually available in WordPress plugins and themes. However, if you're getting an error saying that wp_mail is an undefined function in your plugin, it's likely because:

  1. You're trying to use wp_mail before WordPress has loaded: Make sure you're calling wp_mail after WordPress has loaded. You can do this by adding a plugins_loaded or init hook to your plugin's code.
  2. You're using an outdated WordPress version: wp_mail was introduced in WordPress 2.3. If you're using an older version, you might not have access to this function. Update your WordPress installation to a newer version.
  3. You're using a theme or plugin that conflicts with your plugin: Sometimes, another theme or plugin might be overriding or conflicting with your plugin's code. Try deactivating other plugins and themes to see if the issue persists.
  4. You're using a custom WordPress installation or setup: If you're running a custom WordPress installation or setup, you might need to include the wp_mail function manually. You can do this by adding the following code to your plugin:
    function wp_mail($to, $subject, $message, $headers = '', $attachments = array()) {
 // Your custom wp_mail implementation here
}
  5. You're using a plugin that requires a specific WordPress version: Some plugins might require a specific version of WordPress to function properly. Check your plugin's documentation to see if it has any version requirements.

To troubleshoot the issue, you can try the following:

  1. Check your plugin's code for any errors or typos.
  2. Verify that you're calling wp_mail after WordPress has loaded.
  3. Check your WordPress installation's error logs for any other errors or warnings.
  4. Try deactivating other plugins and themes to see if the issue persists.

If none of these solutions work, please provide more details about your plugin, including the code and any error messages you're seeing. I'll be happy to help you troubleshoot the issue!