Updates the "$db_last_error" timestamp in Settings.php, which is used in determining whether or not to send the admin an email about a database error.

Return value

Expected type: Boolean
Description: True if successful, false otherwise

• Attempts to write to Settings_bak.php first
• Will try to create Settings_bak.php if it doesn't exist
• Attempts to chmod the file if it isn't writable (tries 755 first, then 775 and finally 777 before giving up)
• Will only write to Settings.php if the update of Settings_bak.php was successful
• Will not work if fopen is disabled