php - 捕获 mysql pdo 错误

Question

我正在努力掌握 pdo。我有以下功能:

  function get_editusers($db)  
  {    
    $result = $db->query("SELECT firstname, middlename,surname,fullname,gender, birthdate,homelanguage,department,employeetype,employeestatus,idnumber FROM Persons where employeeid='$employeeid'"); 
    return $result; 
  } 
  $useredit = get_editusers($db); 

我如何知道查询是否正确运行？如果不成功，我希望执行某个操作，但不确定如何“捕获”错误。

if($useredit="failed"){ action if failed} else { action if true}

提前致谢

Answer 1

function get_editusers($db){    
    try {
         $result = $db->query("SELECT firstname, middlename,surname,fullname,gender, birthdate,homelanguage,department,employeetype,employeestatus,idnumber FROM Persons where employeeid='$employeeid'"); 
         return $result; 
    } catch(PDOException $ex) {
         return $ex;
    }
}

$result = get_editusers($db);
if(isset($result->errorInfo)){
    die($result);
}