正确的方法是不显示PHP错误，但将它们存储在数据库中

I have a config to be used in production (not development) PHP site, where I want to hide all PHP errors to the user, but store them in a table in the database. I have the following config, but for some reason if I change the values of the defined constants (customized) to FALSE, I don't get the display error, but neither the database loging:

error_reporting(SHOW_E_ALL); // SHOW_E_ALL = 0 for production
ini_set('display_errors', SHOW_ERRORS); // SHOW_ERRORS = FALSE for production
ini_set('display_startup_errors', SHOW_ERRORS); // SHOW_ERRORS = FALSE for production
set_error_handler('myErrorFunction', E_ALL);

I have tried different combinations, but I get either the error display in the browser navigator and also the database log of the error, or no display and no log, and never the combination that I want: no display and error log into the database.

I have found the solution. The display errors properties must be activated, and the customized error-handler function must not display the error and handle properly, I had forgotten not to hide the error print:

define("DEBUG", FALSE); // set TRUE for debugging purposes
error_reporting(E_ALL); 
ini_set('display_errors', TRUE); 
ini_set('display_startup_errors', TRUE); 
set_error_handler('myErrorFunction', E_ALL);

 function myErrorFunction($errno, $errstr, $errfile, $errline){
     if (!(error_reporting() & $errno)) {
        return;
     }
     $conn = MySQLiConnection::getConnection();

      // insert into database
      ....
      ....
  if(DEBUG){ // if true, it displays the error
     echo "<font color='red'>PHP error in line $errline of file $errfile: " . $errno . " " . str_replace('\\', '/', addslashes($errstr)). '</font>';
  }else{
      // nothing   
  }
    return true;
} // function