How should I configure the trusted hosts setting?

Question

I am trying to add the Trusted Host setting. I copied the code directly from the settings.php file, making sure I removed the * and changed the example to my domain. Using the first example

$settings['trusted_host_patterns'] = array(
  '^www\.example\.org$',
);

The site would not load....got an error stating domain was disallowed

Today using this code and

$settings['trusted_host_patterns'] = array(
  '^example\.org$',
  '^.+\.example\.org$',  
);

I am getting an unexpected error and the site won't load

This is a new site on a shared host. It can't be this difficult! I must be missing something!

Answer 1

I don't know if I was introducing a problem by editing the settings.php off line and then uploading it but decided to edit it with the editor in the file manager on cpanel. I first changed the permissions on the default folder to 755 and opened the folder. Then I highlighted the settings file and changed the permissions to 755. Then I clicked the edit button and located the Trusted Host settings and copied the code. I then pasted it AT THE END of the settings.php file and made the necessary changes to reflect my domain and saved the file and closed the setting file. In a different window, I had the website status page loaded and just refreshed it. IT worked! I don't know why doing it this way worked (editing the file on the server vs offline and uploading it.) but it did! Then I just change the file permissions back to what they were .

Answer 2

Be sure that the uncommented lines are NOT within the original comments. For example, the following will NOT work, even though they have been "uncommented", because they are still within the opening /** and closing */ comments

/**
 * Trusted host configuration.
 *
 * For example:
 * @code
 * $settings['trusted_host_patterns'] = array(
 *   '^www\.example\.com$',
 * );
 $settings['trusted_host_patterns'] = array(
   '^www\.realsitename\.com$',
 );
 * @endcode
 * will allow the site to only run from www.example.com. *
 * 
 */

Adding it after the closing */ (or at the very end, but that makes it hard to find) will work:

/**
 * Trusted host configuration.
 * (snipped)
 */
 $settings['trusted_host_patterns'] = array(
   '^www\.realsitename\.com$',
 );

Answer 3

Use the following code at the end of sites/defaut/settings.php file

/**
 * Trusted host configuration.
 * (snipped)
 */
 $settings['trusted_host_patterns'] = [
 '^localhost$',
 '^127\.0\.0\.1$',
 ];

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