PHP的聯系表格問題

Question

只是想知道你們中的任何一位天才都可以幫助我解決有關PHP聯系人表格的一些問題。

基本上，我有此聯系表，要求以下基本信息：姓名，電子郵件，評論。 問題是：如果在字段為空白時按下“提交”按鈕，則驗證會有效地開始，但是以“破壞”頁面為代價（即</body>和</html>標簽不能關閉）。

我覺得這die(); 在function died($error) ........任何幫助都將不勝感激！

謝謝

PHP：（send_email.php文件）

<?php
if(isset($_POST['email'])) {

    // Email addys
    $email_to = "ch@yahoo.co.uk";
    $email_subject = "message";


    function died($error) {
        // ERRORS
        echo "<p class=\"content-text3\">I am very sorry, but there were error(s) found with the form you submitted.</p> ";
        echo "<p class=\"content-text\">These errors are as follows:</p><br /><br />";
        echo "<p class=\"content-text\">$error </p> <br /><br />";
        echo "<p class=\"content-text\">Please <a href=\"contact.php\">go back</a> and fix these errors.</p><br /><br />";
        die();


    }

    // validation 
    if(!isset($_POST['first_name']) ||
        !isset($_POST['last_name']) ||
        !isset($_POST['email']) ||
        !isset($_POST['telephone']) ||
        !isset($_POST['comments'])) {
        died('We are sorry, but there appears to be a problem with the form you submitted.');   
        die();    
    }

    $first_name = $_POST['first_name']; // required
    $last_name = $_POST['last_name']; // required
    $email_from = $_POST['email']; // required
    $telephone = $_POST['telephone']; // not required
    $comments = $_POST['comments']; // required

    $error_message = "";
    $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
  if(!preg_match($email_exp,$email_from)) {
    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
  }
    $string_exp = "/^[A-Za-z .'-]+$/";
  if(!preg_match($string_exp,$first_name)) {
    $error_message .= 'The First Name you entered does not appear to be valid.<br />';
  }
  if(!preg_match($string_exp,$last_name)) {
    $error_message .= 'The Last Name you entered does not appear to be valid.<br />';
  }
  if(strlen($comments) < 2) {
    $error_message .= 'The Comments you entered do not appear to be valid.<br />';
  }
  if(strlen($error_message) > 0) {
    died($error_message);
  }
    $email_message = "Form details below.\n\n";

    function clean_string($string) {
      $bad = array("content-type","bcc:","to:","cc:","href");
      return str_replace($bad,"",$string);
    }

    $email_message .= "First Name: ".clean_string($first_name)."\n";
    $email_message .= "Last Name: ".clean_string($last_name)."\n";
    $email_message .= "Email: ".clean_string($email_from)."\n";
    $email_message .= "Telephone: ".clean_string($telephone)."\n";
    $email_message .= "Comments: ".clean_string($comments)."\n";

    // create email headers
    $headers = 'From: '.$email_from."\r\n".
    'Reply-To: '.$email_from."\r\n" .
    'X-Mailer: PHP/' . phpversion();
    @mail($email_to, $email_subject, $email_message, $headers);  
    ?>
    <!-- sent success -->
    <p class="content-text">Thank you for contacting me. I will be in touch with you very soon.</p>
    <?php
    }
    ?>

聯系表：

 <div id="contact-form">        
          <form id="contactform" method="post" action="send_email.php">
            <table width="450px" border="0">

              <tr>
               <td valign="top">
                <label for="first_name" style="color:#999;">First Name *</label>
               </td>

               <td valign="top">
                <input  type="text" name="first_name" maxlength="50" size="30"/>
               </td>
              </tr>

              <tr>
               <td valign="top">
                <label for="last_name" style="color:#999;">Last Name *</label>
               </td>
               <td valign="top">
                <input  type="text" name="last_name" maxlength="50" size="30"/>
               </td>
              </tr>

              <tr>
               <td valign="top">
                <label for="email" style="color:#999; font-size:14px">Email Address *</label>
               </td>
               <td valign="top">
                <input  type="text" name="email" maxlength="80" size="30"/>
               </td>
              </tr>

              <tr>
               <td valign="top">
                <label for="telephone" style="color:#999; font-size:14px">Telephone Number</label>
               </td>

               <td valign="top">
                <input  type="text" name="telephone" maxlength="30" size="30"/>
               </td>
              </tr>

              <tr>
               <td valign="top">
                <label for="comments" style="color:#999; font-size:14px">Comments *</label>
               </td>

               <td valign="top">
                <textarea  name="comments"  cols="25" rows="6"></textarea>
               </td>
              </tr>

              <tr>
               <td colspan="2" style="text-align:center">
                <input id="sub" type="submit" value="Submit"/>
               </td>
              </tr>
          </table>

          </form>

          </div><!--end contact form-->

Answer 1

我假設您是說有錯誤時不輸出表格，對嗎？

這是因為die()終止了頁面的處理，包括PHP標記之外的任何內容。 您可以嘗試從錯誤中刪除die()語句，而將die() died()函數放在if / else語句中。

例如：

if (strlen($error_message) > 0) {
    died($error_message);
} else {
    // send the email
}

Answer 2

是的，您已經確定了自己的問題。 不要在腳本中間使用die（）。 可能會有人投票贊成關閉它，而我不會為您重寫簡單的代碼，但是我冒着為您朝着正確的方向做實際推動的危險，並建議這是您想要的腳本格式：

首先，更改您的提交按鈕，使其具有名稱屬性：

<input id="sub" type="submit" name="SubmitEmailForm" value="Submit"/>

盡管這里的重要性不那么重要，但是當您的頁面上有多個表單時，它將使您能夠確定提交的表單。

在您的驗證腳本中，將錯誤數組變量初始化為空數組：

function validateEmailForm() {
    $errors = array();
    // All validation here
    // if an error occurs...
    $errors[] = 'Error text here.';
    return $errors;
}

這樣，您可以一次捕獲所有驗證錯誤，因此可以向用戶提供他們需要修復的問題的完整報告。

那么您的基本結構是：

if (isset($_POST['SubmitEmailForm'])) {
    $errors = validateEmailForm();
    if (count($errors) == 0) {
        // Form was fine, go ahead and process it
        // header(..location of your post-processing script or output..);
        // Make sure you exit to end processing of script
        exit; 

    } else {
        //
        // Output a box containing the errors from $errors using a foreach
        //

    }  
}
//
// Output your form markup here.
//

這是大多數自發布表單都使用的基本框架，您可以很輕松地為該模式添加修飾。