Php表單 - 錯誤檢查和輸出

Question

我創建了一個簡單的表單，其中包含一些必填字段，如果未完成，則會向用戶傳回錯誤，以通知他們該字段是必需的。 由於有多個字段是檢查它可以輸出多個錯誤消息。

我想知道如何在我的表單上定義一個區域，這些錯誤顯示在屏幕上，這些錯誤只顯示在窗體的底部，除非您向下滾動頁面，否則無法看到這些錯誤。

我可以定義我的錯誤顯示位置嗎？

這裏是錯誤校驗碼：編輯

Old code was here 

以往人們曾建議我做一個循環，在一次檢查錯誤之一，但我在PHP是新手，所以不知道如何做到這一點。

$errors = ''; 
    if(empty($_POST['studentName'])) 
    { 
    $errors .= "You did not enter the student name<br/>"; 
    } 

//Code to check that the Tutor Name field is completed 
    if(empty($_POST['tutorName'])) 
    { 
    $errors .="You did not select a tutor<br/>"; 
    } 

//Code to check that the Procedure field is completed 
    if(empty($_POST['procedure'])) 
    { 
    $errors .="You did not enter a procedure<br/>"; 
    } 
//Code to check that the Grade field is completed 
    if(empty($_POST['grade'])) 
    { 
    $errors .="You did not enter a grade<br/>"; 
    } 
//Code to check that the Student Reflection field is completed 
    if(empty($_POST['studentReflection'])) 
    { 
    $errors .="You did not enter a reflection<br/>"; 
    } 
//Code to check if the tick box is checked that the tutor comment is entered 
    if(!strlen($_POST['tutorComments']) && isset($_POST['alert'])) 
    { 
    $errors .="You must enter a reasan why you ticked the alert box"; 
    } 

//Code to check the password field is completed and correct 
    if (empty($_POST['password'])) 
    { 
    $errors .="You did not enter you password"; 
    } 

    if (!empty($_POST['password'])) 
    { 

//========================================== 
// ESCAPE DANGEROUS SQL CHARACTERS 
//========================================== 
function quote_smart($value, $handle) { 

    if (get_magic_quotes_gpc()) { 
     $value = stripslashes($value); 
    } 

    if (!is_numeric($value)) { 
     $value = "'" . mysql_real_escape_string($value, $handle) . "'"; 
    } 
    return $value; 
} 

if ($_SERVER['REQUEST_METHOD'] == 'POST'){ 

    $masterpass = $_POST['password']; 
    $masterpass = htmlspecialchars($masterpass); 

    //========================================== 
    // CONNECT TO THE LOCAL DATABASE 
    //========================================== 
    $user_name = "username"; 
    $pass_word = "password"; 
    $database = "name of database"; 
    $server = "server"; 

    $db_handle = mysql_connect($server, $user_name, $pass_word); 
    $db_found = mysql_select_db($database, $db_handle); 

    if ($db_found) { 

     $masterpass = quote_smart($masterpass, $db_handle); 

     $SQL = "SELECT * FROM masterpass WHERE password = $masterpass"; 
     $result = mysql_query($SQL); 
     $num_rows = mysql_num_rows($result); 

    //==================================================== 
    // CHECK TO SEE IF THE $result VARIABLE IS TRUE 
    //==================================================== 

     if ($result) { 
      if ($num_rows > 0) { 
       echo ""; 
      } 
      else { 
       $errors .= "Password was not recognised"; 
       exit(); 
      } 
     } 
     mysql_close($db_handle); 

    } 
} 
if(!empty($errors)) 
{ 
    echo '<div class="errors">' . $errors . '</div>'; 
    exit(); 
    } 

} 

Answer 1

回聲（）你的錯誤是什麼加入他們的底部。正如前面的答案建議的那樣，將它們分配給一個字符串並在定義的div中打印（如果它不是空的話）是專業人員如何做的！

將錯誤定義爲數組也是可行的，並且允許您對錯誤過程進行更細粒度的控制。

$errors = array(); 
if(empty($_POST['studentName'])) 
    $errors[] = "You did not enter the student name"; 

if(empty($_POST['tutorName'])) 
    $errors[] = "You did not select a tutor name."; 

//etc... 

//At the top of your page. 
if (sizeof($errors)>0) { 
    echo "<div class='errordiv'>"; 
    echo "<ul>"; 
    foreach ($errors as $err) { 
     echo "<li>".$err."</li>"; //or whatever format you want! 
    } 
    echo "</ul></div>"; 
} 

您還可以通過周圍的錯誤數組作爲參數傳遞給其他的功能，記錄他們，等

Answer 2

你可以做類似

$errors = ''; 

if(empty($_POST['studentName'])) 
{ 
    $errors .= "You did not enter the student name<br />"; 
} 

if(empty($_POST['tutorName'])) 
{ 
    $errors .= "You did not select a tutor name.<br />"; 
} 

// etc. 

，然後你<form>有

if (!empty($errors)) 
{ 
    echo '<div class="errors">' . $errors . '</div>'; 
} 

以上造型.errors與CSS所以它會更加突出。如果$errors在您的應用程序邏輯中處於空白狀態，則可以執行通常的數據庫添加/更新並重定向至成功頁面。