爲什麼這個腳本不能正確清理輸出？

Question

我想清理應該是一個簡單的電子郵件腳本的輸出，但它只輸出一個空白頁面。下面是該腳本：

<?php 
define("EMAIL", "info@silentpost.net"); 

if(isset($_POST['submit'])) { 

    //include validation class 
    include('./support/validate.class.php'); 

    //assign post data to variables 
    $_POST['name'] = filter_var($_POST['name'], FILTER_SANITIZE_STRING); 
    $_POST['email'] = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL); 
    $_POST['message'] = filter_var($_POST['message'], FILTER_SANITIZE_STRING); 

    $name = trim($_POST['name']); 
    $email = trim($_POST['email']); 
    $message = trim($_POST['message']); 

    //start validating our form 
    $v = new validate(); 
    $v->validateStr($name, "name", 3, 75); 
    $v->validateEmail($email, "email"); 
    $v->validateStr($message, "message", 5, 1000); 

    if(!$v->hasErrors()) { 
     $header = "From: $email\n" . "Reply-To: $email\n"; 
     $subject = "email from silentpost.net website!"; 
     $email_to = EMAIL; 

     $emailMessage = "Name: " . $name . "\n"; 
     $emailMessage .= "Email: " . $email . "\n\n"; 
     $emailMessage .= $message; 

     @mail($email_to, $subject ,$emailMessage ,$header); 

    } else { 
    //set the number of errors message 
    $message_text = $v->errorNumMessage(); 

    //store the errors list in a variable 
    $errors = $v->displayErrors(); 

    //get the individual error messages 
    $nameErr = $v->getError("name"); 
    $emailErr = $v->getError("email"); 
    $messageErr = $v->getError("message"); 
    }//end error check 


}// end isset 
?> 

如果我忽略了下面的代碼，腳本會運行良好：

$_POST['name'] = filter_var($_POST['name'], FILTER_SANITIZE_STRING); 
$_POST['email'] = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL); 
$_POST['message'] = filter_var($_POST['message'], FILTER_SANITIZE_STRING); 

如果必要的話，我將包括類，但我不認爲這是一個問題與類，因爲正確地刪除filter_var行輸出。

任何幫助，將不勝感激。

Answer 1

我會做兩件事情：

A.確保你運行PHP> = 5.2（最低爲filter_var功能）。

B.將error_reporting(E_ALL);添加到腳本的頂部，這會讓您看到引發空白頁面的錯誤。

Answer 2

看來腳本沒有錯。什麼是確切的問題？您的腳本是否不發送電子郵件，如果您進行清理或未輸出任何內容？如果是後者，那麼我認爲你的腳本不會產生任何輸出。

嘗試呼應你的內容，前後消毒後，看他們是否有所不同：

echo 'BEFORE<br>'; 
echo $_POST['name'] . '<br>'; 
echo $_POST['email'] . '<br>'; 
echo $_POST['message'] . '<br>'; 

$_POST['name'] = filter_var($_POST['name'], FILTER_SANITIZE_STRING); 
$_POST['email'] = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL); 
$_POST['message'] = filter_var($_POST['message'], FILTER_SANITIZE_STRING); 

echo 'AFTER<br>'; 
echo $_POST['name'] . '<br>'; 
echo $_POST['email'] . '<br>'; 
echo $_POST['message'] . '<br>';