PHP - 錯誤處理的結構

Question

我有一個腳本，它運行一堆作業和驗證，一旦所有東西都通過，它會執行插入操作並將json返回給ajax腳本。

現在，我的劇本是這樣的

$response = ""; 
if (isset($_POST['upload'])){ 


    // some basic data 


    // prevent duplicates 
    if($check_duplicates){ 

     // create json error 
     $helper->error_duplicate($name); 
    } 


    // some more data 


    // run validation 
    $validation = $helper->validate_form(); 

    // create json error if fails 
    if($!$validation){ 
     $helper->error_validation(); 
    } 

    // validate file 
    $valid_file = $helper->validate_file(); 

    // create json error if fails 
    if($!$valid_file){ 
     $helper->error_valid_file(); 
    } 


    // more data 


    //execute the insert 
    $insert_db = $database->execute_statement($insert_array,$file_name,$cleanup=true); 

    // check if insert was successful 
    if(!$insert_db){ 
     $response= array(
      "result" => "Failure", 
      "title" => "Database Error", 
      "message" => "There was an error with the insert" 
     ); 
     echo (json_encode($response)); 
    } 

    if($response == ""){ 
    $response= array(
     "result" => "Success", 
     "title" => "Successful Insert", 
     "message" => "The insert was successful" 
    ); 
    echo (json_encode($response)); 
    } 
}else{ 
    $response= array(
     "result" => "Failure", 
     "title" => "No Access Allow", 
     "message" => "This page is restricted" 
    ); 
    echo (json_encode($response)); 
} 

現在，如果早期驗證的一個失敗，也就沒有必要繼續利用有效的休息和插入，但它的將是混亂的有如此多嵌套if。我確定這是一種常見情況，但我不確定處理它的最佳方式。有沒有人有任何建議，或有更好的方式來格式化。

Answer 1

if (!$check_duplicates) $helper->error_duplicate($name); 
elseif (!$validation = $helper->validate_form()) $helper->error_validation(); 
elseif (!$valid_file = $helper->validate_file()) $helper->error_valid_file(); 
elseif (!$insert_db = $database->execute_statement($insert_array,$file_name,$cleanup=true)) 
    echo json_encode(array(
    "result" => "Failure", 
    "title" => "Database Error", 
    "message" => "There was an error with the insert" 
)); 
else 
    echo json_encode(array(
    "result" => "Success", 
    "title" => "Successful Insert", 
    "message" => "The insert was successful" 
));