致命錯誤：未嘗試/ catch塊未捕獲的異常

Question

我想在表單域爲空並且插入查詢不成功時引發異常。我看到有人在不使用try/catch塊的情況下拋出異常，並且沒有包含Exceptions類。有誰知道我會怎麼做呢？

這是我收到的時候我不填寫所有字段的錯誤：與消息「錯誤未捕獲的異常「例外」：

致命錯誤以下字段標題空阱，電話號碼，電子郵件， 'in /vagrant/web/Assignment4/Person.php on line 94例外：錯誤：以下字段爲空 - 標題，電話號碼，電子郵件，位於94行的/vagrant/web/Assignment4/Person.php調用堆棧：0.0014 638168 1. {主}（）/vagrant/web/Assignment4/Form.php:0 0.0172 698568 2.人 - >插入（）/vagrant/web/Assignment4/Form.php:179

public function insert() 
{ 

    //Storing required $_POST array fields in variable for isset function  
    $errorArray = array(); 

    $expectedValues = array(
     "firstName" => "First Name", 
     "lastName" => "Last Name", 
     "title"  => "Title", 
     "office"  => "Office", 
     "phoneNumber" => "Phone Number", 
     "email"  => "Email", 
     ); 


    //Checking to see if all fields are filled in 

    foreach ($expectedValues as $field => $humanName) { 
     if (empty($_POST[$field])) { 
     $errorArray[] = $humanName . ", "; 
     } 
    } 

    if (count($errorArray) > 0) { 
      throw new Exception("Error: The following fields are empty- " .implode(' ', $errorArray)); 
     } 


    else{ 


     //If they are, insert them into the Perosn table  

       $insert = $this-> doQuery("INSERT INTO Person 
             VALUES(
             '$_POST[firstName]', 
             '$_POST[lastName]', 
             '$_POST[title]', 
             '$_POST[office]', 
             '$_POST[phoneNumber]', 
             '$_POST[email]')"); 



     //If insert query is successful, return true 
      if ($insert === true){ 
       echo "<h2>" . "Congragulations! You now work for Assignment 4 Incorporated" . "</h2>"; 
       return true; 
      } 


     //If not, throw an exception  

      /* else{ 
       throw new Exception 
       ("<p>" . "Error: Query was unsuccessful:" . " " . $this->error . "</p>"); 
       } 

       try{ 
        $insert == true; 
       } 
       catch (Exception $x){ 
        echo $x->getMessage; 
       }  
    */ 
     } 

    } 

Answer 1

你不能拋出一個catch沒有「嘗試」某些東西的恐怖;

$errorArray = array(); 

$expectedValues = array(
    "firstName" => "First Name", 
    "lastName" => "Last Name", 
    "title"  => "Title", 
    "office"  => "Office", 
    "phoneNumber" => "Phone Number", 
    "email"  => "Email", 
); 

try{ 
    foreach ($expectedValues as $field => $humanName) { 
     if (empty($_POST[$field])) { 
      $errorArray[] = $humanName . ", "; 
     } 
    } 

    if (count($errorArray) > 0) { 
     throw new Exception("Error: The following fields are empty- " .implode(' ', $errorArray)); 
    }else{ 
     $insert = $this-> doQuery("INSERT INTO Person 
      VALUES(
      '$_POST[firstName]', 
      '$_POST[lastName]', 
      '$_POST[title]', 
      '$_POST[office]', 
      '$_POST[phoneNumber]', 
      '$_POST[email]')" 
     ); 

     if ($insert === true){ 
      echo "<h2>" . "Congragulations! You now work for Assignment 4 Incorporated" . "</h2>"; 
      return true; 
     } 
    } 
}catch(Exception $e){ 
    echo $e->getMessage(); 
} 

在您的代碼中，您在嘗試之前拋出錯誤，導致致命錯誤「沒有try/catch塊的未捕獲異常」。該代碼發現了一個錯誤，但它並不是真的想要捕捉任何東西。