Обработка исключений - какова лучшая практика в этом вопросе?

class MyException extends Exception {
   public function __construct($message, $errorLevel = 0, $errorFile = '', $errorLine = 0) {
      parent::__construct($message, $errorLevel);
      $this->file = $errorFile;
      $this->line = $errorLine;
   }
}
set_error_handler(create_function('$c, $m, $f, $l', 'throw new MyException($m, $c, $f, $l);'), E_ALL);

 class MyException extends Exception {
    public function __construct($message, $errorLevel = 0, $errorFile = '', $errorLine = 0) {
    parent::__construct($message, $errorLevel);
    $this->file = $errorFile;
    $this->line = $errorLine;
 }
}
 
set_error_handler(create_function('$c, $m, $f, $l', 'throw new MyException($m, $c, $f, $l);'), E_ALL);
try{
 a();
}catch(MyException $e){
 echo 'error';
}

<?
class errors{ public static $errors=array(); }
 
function myErrorHandler($errno, $errstr, $errfile, $errline)
{
  errors::$errors[] = array( $errno, $errstr, $errfile, $errline );
}
 
set_error_handler("myErrorHandler");
register_shutdown_function('ErrorSaver');
 
file_get_contents('wrong_file');
 
 
function ErrorSaver(){
  echo 'now u can save ur errors';
  var_dump(errors::$errors);
}

<?
ob_start();
register_shutdown_function('ErrorSaver');
file_get_contents('wrong_file');
 
 
function ErrorSaver(){
  $data = ob_get_contents();
  echo "Error can be saved in file:" . $data;
}

<?
register_shutdown_function('FatalError');
fatal();
function FatalError(){
 $error = error_get_last();
 echo '<pre>';
 var_dump($error);
}