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trigger_error() — output an error message
void trigger_error(string error_msg,
                   int level);
   This function can be used to output an error message using Smarty.
   level parameter can be one of the values
   used for the PHP 
   trigger_error() function, eg:
   E_USER_NOTICE, E_USER_WARNING, etc.
   By default it's E_USER_WARNING.
  
    See also
    
    $error_reporting,
    debugging
    and
    troubleshooting.