php - PHP邮件表单 - 在浏览器中单击后退按钮时防止重新提交

Question

在这里的一些小伙子的建议下，我重新设计了一个联系表格。我仍然是编码的新手，并且仍在学习很多东西。

到目前为止，我的代码有问题。

我正在制作的联系表格，我首先尝试在不使用 Javascript 的情况下使表格工作。一旦我在没有 js 的情况下破解它，我将添加客户端验证。

我已经使用排序的 PHP 脚本进行了所有清理和验证。我的问题现在是处理 resbumissions。

成功提交表单后，我可以清除 PHP 脚本的相关输入字段和变量，以防止成功后重新提交，但是没有什么可以阻止用户只需在浏览器中单击“返回”并返回他们刚刚提交的表单，完成他们输入的所有值。从那里他们可以再次单击提交，PHP 脚本运行并发送完全相同的内容。

PHP 脚本和 HTML 表单的代码位于名为contact-form-template.php 的文件中。
该表格包含在几页上；所以在我想要联系表格的页面上，我使用的是 include('contact-form-template.php')。

有谁知道当用户点击浏览器中的后退按钮时我如何停止重新提交表单。

仅供参考-我尝试在各个行上包含一个标头（位置：等）重定向，每个行都带有：

警告：无法修改标头信息 - 标头已由 /home/user/public_html/test/contact-us.php:152 中的 /home/user/public_html/test/contact-form-template.php 发送第 260 行

任何帮助表示赞赏。谢谢

所以我有一个实际的联系页面，即contact-us.php - 除了这一行之外都是HTML：

<?php include('contact-form-template.php') ; ?>

然后是contact-form-template.php，下面有PHP 脚本和HTML 表单。

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

$sender_name        = $_POST['input_name'] ;
$sender_company     = $_POST['input_company'] ;
$sender_email       = $_POST['input_email'] ;
$sender_telephone   = $_POST['input_telephone'] ;
$sender_message     = $_POST['input_message'] ;
$human_response     = $_POST['input_human'] ;
$callback_date      = $_POST['input_date'] ;
$callback_time      = $_POST['input_time'] ;

// Error Messages
$errorMsg_prefix                = "<li>" ;
$errorMsg_suffix                = "</li>" ;
// Name
$errorMsg_Name_Empty            = $errorMsg_prefix . "Please enter your name (cannot be empty)." . $errorMsg_suffix ;
$errorMsg_Name_Invalid          = $errorMsg_prefix . "Please your name using valid characters only." . $errorMsg_suffix ;
// Email
$errorMsg_Email_Invalid         = $errorMsg_prefix . "Please enter a valid e-mail address." . $errorMsg_suffix ;
$errorMsg_Email_Empty           = $errorMsg_prefix . "Please enter your e-mail address (cannot be empty)." . $errorMsg_suffix ;
// Telephone
$errorMsg_Telephone_Invalid     = $errorMsg_prefix . "Please enter a valid telephone number." . $errorMsg_suffix ;
$errorMsg_Telephone_Empty       = $errorMsg_prefix . "Please enter your telephone number (cannot be empty)." . $errorMsg_suffix ;
// Message
$errorMsg_Message               = $errorMsg_prefix . "Please enter a message. Your message should be at least 30 and no more than 3000 characters in length." . $errorMsg_suffix ;
// Human
$errorMsg_Human_Incorrect       = $errorMsg_prefix . "You have not answered the simple maths question correctly!" . $errorMsg_suffix ;
// Callback Date
$errorMsg_callbackDate          = $errorMsg_prefix . "Please enter a valid date for us to call you back on, formatted as dd/mm/yyyy (for example: 31/01/2013)." . $errorMsg_suffix ;
$errorMsg_callbackDate_ifTime   = $errorMsg_prefix . "You have selected a date for us to call you back, but not a time." . $errorMsg_suffix ;
// Callback Time
$errorMsg_callbackTime_ifDate   = $errorMsg_prefix . "You have selected a time for us to call you back, but not a date." . $errorMsg_suffix ;


// Server Side Validation
// Input: Name
if ( $sender_name != "") {
    $sender_name = substr(filter_var( $sender_name, FILTER_SANITIZE_STRING), 0,49) ;  
    if ( $sender_name == "" ) {  
        $errors .= $errorMsg_Name_Invalid ;
    }
} else {
    $errors .= $errorMsg_Name_Empty ;
} 

// Input: Company
if ( $sender_company != "") { 
    $sender_company = substr(filter_var( $sender_company, FILTER_SANITIZE_STRING),0,49);
}



// Input: Email
if ( $sender_email != "") {  
    $email_temp = filter_var( $sender_email, FILTER_SANITIZE_EMAIL); 
    if (!filter_var( $email_temp, FILTER_VALIDATE_EMAIL )) {  
        $errors .= $errorMsg_Email_Invalid ;
    }  
} else {  
    $errors .= $errorMsg_Email_Empty ;
}  


// Input: Telephone
if ( $sender_telephone != "") {
    $sender_telephone = filter_var($sender_telephone, FILTER_SANITIZE_NUMBER_INT);
    if ( strlen ( $sender_telephone ) < 11 || strlen ( $sender_telephone ) > 12 ) {
        $errors .= $errorMsg_Telephone_Invalid ;
    }
} else {
    $errors .= $errorMsg_Telephone_Empty ;
} 

// Input: Message
if ( $sender_message != "") {  
   $sender_message = filter_var($sender_message, FILTER_SANITIZE_STRING);  
    if ($sender_message == "") {  
        $errors .= $errorMsg_Message ;
    } elseif ( strlen ($sender_message) < 30 || strlen ($sender_message) > 3000 ) {
        $errors .= $errorMsg_Message ;
    }
} else {  
    $errors .= $errorMsg_Message ;
}

// Input: Human
if ( $human_response != "12" ) {
    $errors .= $errorMsg_Human_Incorrect ;
}

// Input: Callback date
$callback_date = filter_var($callback_date, FILTER_SANITIZE_STRING);
    if ( $callback_date != "" ) {
        list ($day,$month,$year) = explode ("/" ,$callback_date );
        if ( (is_numeric($day)) || (is_numeric($month)) || (is_numeric($year)) and strlen($year) == 4 ) {
            if (!checkdate($month, $day, $year)) 
                $errors .= $errorMsg_callbackDate ;
            } else {
                $errors .= $errorMsg_callbackDate ;
            }
        }
    if ( $callback_date != "" && $callback_time == "") {
        $errors .= $errorMsg_callbackDate_ifTime ;
    }


// Input: Callback Time
if ( $callback_time != "" && $callback_date == "" ) {
    $errors .= $errorMsg_callbackTime_ifDate ;
}

// If there are no errors - send the form.
if (!$errors) {

    $sender_ipAddress   = $_SERVER['REMOTE_ADDR'];
    $sender_browser     = $_SERVER['HTTP_USER_AGENT'];

    // E-mail headers
    $recipient_email    = "hello@domin.com" ;
    $headers            = "MIME-Version: 1.0" . "\r\n";
    $headers            .= "Content-type:text/html; charset: utf8" . "\r\n";
    $headers            .= "From: Website\r\n"; 
    $headers            .= 'Reply-To: no-reply@domain.com' . "\r\n" ;

    // Setting the e-mail subject
    $subject            = "Message from the website." ;



    // For database scripting - replace new-line html with carriage return character - Array
    // Placeholders for array
    $sender_message_placeholders = array("\n") ;
    //Replace Values for array
    $sender_message_replaceValues = array("¶") ;
    // $sender_message stripped of new-lines, and replaced with nc-characters.
    $sender_message_stripped = str_replace($sender_message_placeholders, $sender_message_replaceValues, $sender_message) ;

    // Writing the e-mail body.

    //Head - Commmon
    $emailBody  = "
    <head>
    <style type \"text/css\">
    body                                { font-family: Helvetica, Arial ; font-size: 16px ; line-height: 20px ; color: #5e5e5e }
    h1                                  { font-size: 42px ; line-height: 42px ; color: #c1c1c1 }
    div.section                         { padding: 12px ; margin-bottom: 8px ; background-color: #f7f7f7 ; border: 1px solid #c8c8c8 }
    div.section#callback-details        { background-color: #f8e0e0 }
    div.section#callback-details label  { color: #df5c5c }
    div.part                            { margin-bottom: 8px }
    div.part:last-child                 { margin-bottom: 0 }

    label                               { margin: 0 ; font-size: 13px ; line-height: 20px ; font-weight: bold ; color: #80a553  }
    p                                   { margin: 0  }
    p.input-field#sender-message        { white-space: pre-line }

    div#dbImport                        { color: #a1a1a1!important  }
    div#dbImport p                      { font-size: 12px!important ; line-height: 19px ; white-space: normal!important }
    </style>
    </head> 

    <body>
    <html>

    <h1>Message</h1>

    <p class=\"input-field\" style=\"margin-bottom:12px\">A message has been sent.</p>
    " ;

    // If Callback Date/Time are provided
    if ( $callback_date != "" ) {
    $emailBody .= "
    <div class=\"section\" id=\"callback-details\">     
        <div class=\"part\">
            <label>Callback Date:</label>
            <p class=\"input-field\">$callback_date</p>
        </div><!-- !.part -->
        <div class=\"part\">
            <label>Callback Time:</label>
            <p class=\"input-field\">$callback_time</p>
        </div><!-- !.part -->
    </div><!-- !.section -->
    " ;
    }

    // Body - Common
    $emailBody .= "
    <div class=\"section\">     
        <div class=\"part\">
            <label>Name:</label>
            <p class=\"input-field\">$sender_name</p>
        </div><!-- !.part -->
        <div class=\"part\">
            <label>Company:</label>
            <p class=\"input-field\">$sender_company</p>
        </div><!-- !.part -->
        <div class=\"part\">
            <label>E-mail:</label>
            <p class=\"input-field\">$sender_email</p>
        </div><!-- !.part -->
        <div class=\"part\">        
            <label>Telephone:</label>
            <p class=\"input-field\">$sender_telephone</p>
        </div><!-- !.part -->
    </div><!-- !.section -->

    <div class=\"section\">     
        <div class=\"part\">
            <label>Message:</label>
            <p class=\"input-field\" id=\"sender-message\">$sender_message</p>
        </div><!-- !.part -->
    </div><!-- !.section -->

    <div class=\"section\" id=\"visitor-info\">
        <div class=\"part\">
            <label>Sender IP Address:</label>
            <p class=\"input-field\"><a href=\"http://network-tools.com/default.asp?prog=express&host=$sender_ipAddress\">$sender_ipAddress</a></p>
        </div><!-- !.part -->
        <div class=\"part\">
            <label>Sender Web Browser:</label>
            <p class=\"input-field\">$sender_browser</p>
        </div><!-- !.part -->
    </div><!-- !.section -->

    <div id=\"dbImport\">
        <p style=\"font-weight:bold\">IMPORTDB DATA</p>
        <p>NAME/COMPANY/EMAIL/TELEPHONE/MESSAGE/CALLBACK-DATE/CALLBACK-TIME</p>
        <p>#begin#$sender_name#$sender_company#$sender_email#$sender_telephone#$sender_message_stripped#$callback_date#$callback_time#end</p>
    </div>

    </body>
    </html>" ;

    /* Send the message using mail() function */
    //mail($recipient_email, $subject, $emailBody, $headers) ;



    // The message to display in the contact form success div
    $success_message = "
    <div id=\"successContainer\">
        <h4>Your message has been sent.  Thank you.</h4>
        <hr>
        <p>Someone will get back to you very shortly.  We aim to respond to all messages within 24 hours.  If your enquiry is super-duper-urgent, why not give us a ring?</p>
    </div>
    " ;

    // Reset the form if successful.        
    $sender_name = "" ;
    $sender_company = "" ;
    $sender_email = "" ;
    $sender_telephone = "" ;
    $sender_message = "" ;
    $human_response = "" ;
    $callback_date = "" ;
    $callback_time = "" ;


    // end 'if there are no errors'


} else {  // if there are errors with the users inputs
    $error_message = "
    <div class=\"errorContainer\" style=\"display: block\">
        <b style=\"display:block\">Oops... it looks like there is a problem with the data you have entered into the form.  Please correct the following errors:</b>
        <ul>
        $errors
        </ul>
    </div>" ;
    //echo $error_message ;
}
}




 ?>



<!-- The HTML Form -->


<form id="contact-form" method="post" action="" class="contact-form clearfix">
<div id="contact_form"></div>
<h2>Contact Form</h2>
<?php if(isset($error_message)) { echo $error_message ; }  ;?>
<?php if(isset($success_message)) { echo $success_message ; }  ;?>
<div id="errorContainer" class="errorContainer">
    <b>Oops... it looks like there is a problem with the data you have entered into the form.  Please correct the following errors:</b>
    <ul />
</div><!--  !#errorContainer-callback  -->
<!--  BEGIN 4 INPUT FIELDS  -->
<div id="input-fields">
    <div id="name-company">
        <label>Name</label>
            <input name="input_name" tabindex="1" value="<?php echo htmlspecialchars($sender_name); ?>">
        <label>Company</label>
            <input name="input_company" tabindex="2" value="<?php echo htmlspecialchars($sender_company); ?>">
    </div><!--  ! #name-company -->
    <div id="email-telephone">
        <label>Email</label>
            <input name="input_email" tabindex="3" value="<?php echo htmlspecialchars($sender_email); ?>">
        <label>Telephone</label>
            <input name="input_telephone" tabindex="4" value="<?php echo htmlspecialchars($sender_telephone); ?>">
    </div><!--  ! #email-telephone  -->
</div><!--  ! #input-fields  -->
<!--  BEGIN MESSAGE CELL  -->
<div id="message">
    <label>Tell us a little about what you'd like talk about when we call you back.</label>
    <textarea name="input_message" id="input_message" tabindex="5"><?php if (isset($sender_message)) { echo htmlspecialchars($sender_message) ; } ?></textarea>
</div><!--  ! #message  -->
<div class="clearfix"></div>
<!-- BEGIN Bottom of Form (Date/Time/Human/Button)  -->
<div id="end">
    <!-- BEGIN DATE  -->
    <div id="cell1" class="cell">
        <label>When would you like us to get back to you?</label>
        <div>
            <input placeholder="Date" name="input_date" type="date" id="callback-date" tabindex="6" value="<?php echo $callback_date ; ?>">
        </div><!--  ! date input container  -->
        <!-- BEGIN CELL-TIME  -->
        <div>
            Time
            <select id="callback-time" name="input_time" tabindex="7">
                <?php if($_POST['submit'] == true) { ?>
                    <option value="<?php echo $callback_time ; ?>" selected="selected">
                    <?php echo $callback_time ; ?>
                    </option>
                <?php } else { ?>
                    <option value=""></option>
                <?php } ?>                  
                <option value=""></option>
                <option value="0900-1100">09:00-11:00</option>
                <option value="1100-1300">11:00-13:00</option>
                <option value="1300-1500">13:00-15:00</option>
                <option value="1500-1700">15:00-17:00</option>
            </select>
        </div><!--  ! subcell -->

    </div><!-- ! #cell1 -->
    <!-- BEGIN CELL-HUMANCHECK  -->
    <div id="cell2" class="cell human-check">
        <label><b> What is 3 + 9</b></label>
        <input id="human-result-callback" class="human" name="input_human" type="number" maxlength="2" tabindex="8"/>
    </div><!-- ! #cell2 .cell -->
    <!-- BEGIN CELL-BUTTON  -->
    <div id="cell3" class="cell">
        <input class="button" id="submit" name="submit" type="submit" value="Send Your Message">
    </div><!-- ! #cell3 .cell -->
</div><!--  ! #end  --> 
</form>

score 0 · Accepted Answer

编辑（＃1）

重定向方法：

基于JS的重定向方法：

您可以使用它来代替header('Location: page.php');您的mail()功能。

它是基于 JS 的echo("<script>window.location = 'your_page.php';</script>");

并且即使在标题之前也不会抛出错误。

您也可以使用一种href方法。

echo "<a href=\"your_page.php\" target=\"_top\">Click here to return to our website</a>";

经过测试

地方header('Location: http://www.example.com');

在您的下方：mail($recipient_email, $subject, $emailBody, $headers) ;

它将重定向而没有错误。

更改http://www.example.com为您选择的站点/页面。

我action="<?php $_SERVER['PHP_SELF'] ?>"使用您的代码在我的测试表单中用作操作。

另外我建议你在你的表格中改变这个：

$headers .= "From: Website\r\n";

到

$headers .= "From:" . $sender_email . "\r\n";

重写（按原样使用并更改电子邮件和标题位置的 2 个变量）

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

$sender_name        = $_POST['input_name'] ;
$sender_company     = $_POST['input_company'] ;
$sender_email       = $_POST['input_email'] ;
$sender_telephone   = $_POST['input_telephone'] ;
$sender_message     = $_POST['input_message'] ;
$human_response     = $_POST['input_human'] ;
$callback_date      = $_POST['input_date'] ;
$callback_time      = $_POST['input_time'] ;

// Error Messages
$errorMsg_prefix                = "<li>" ;
$errorMsg_suffix                = "</li>" ;
// Name
$errorMsg_Name_Empty            = $errorMsg_prefix . "Please enter your name (cannot be empty)." . $errorMsg_suffix ;
$errorMsg_Name_Invalid          = $errorMsg_prefix . "Please your name using valid characters only." . $errorMsg_suffix ;
// Email
$errorMsg_Email_Invalid         = $errorMsg_prefix . "Please enter a valid e-mail address." . $errorMsg_suffix ;
$errorMsg_Email_Empty           = $errorMsg_prefix . "Please enter your e-mail address (cannot be empty)." . $errorMsg_suffix ;
// Telephone
$errorMsg_Telephone_Invalid     = $errorMsg_prefix . "Please enter a valid telephone number." . $errorMsg_suffix ;
$errorMsg_Telephone_Empty       = $errorMsg_prefix . "Please enter your telephone number (cannot be empty)." . $errorMsg_suffix ;
// Message
$errorMsg_Message               = $errorMsg_prefix . "Please enter a message. Your message should be at least 30 and no more than 3000 characters in length." . $errorMsg_suffix ;
// Human
$errorMsg_Human_Incorrect       = $errorMsg_prefix . "You have not answered the simple maths question correctly!" . $errorMsg_suffix ;
// Callback Date
$errorMsg_callbackDate          = $errorMsg_prefix . "Please enter a valid date for us to call you back on, formatted as dd/mm/yyyy (for example: 31/01/2013)." . $errorMsg_suffix ;
$errorMsg_callbackDate_ifTime   = $errorMsg_prefix . "You have selected a date for us to call you back, but not a time." . $errorMsg_suffix ;
// Callback Time
$errorMsg_callbackTime_ifDate   = $errorMsg_prefix . "You have selected a time for us to call you back, but not a date." . $errorMsg_suffix ;


// Server Side Validation
// Input: Name
if ( $sender_name != "") {
    $sender_name = substr(filter_var( $sender_name, FILTER_SANITIZE_STRING), 0,49) ;  
    if ( $sender_name == "" ) {  
        $errors .= $errorMsg_Name_Invalid ;
    }
} else {
    $errors .= $errorMsg_Name_Empty ;
} 

// Input: Company
if ( $sender_company != "") { 
    $sender_company = substr(filter_var( $sender_company, FILTER_SANITIZE_STRING),0,49);
}

// Input: Email
if ( $sender_email != "") {  
    $email_temp = filter_var( $sender_email, FILTER_SANITIZE_EMAIL); 
    if (!filter_var( $email_temp, FILTER_VALIDATE_EMAIL )) {  
        $errors .= $errorMsg_Email_Invalid ;
    }  
} else {  
    $errors .= $errorMsg_Email_Empty ;
}  

// Input: Telephone
if ( $sender_telephone != "") {
    $sender_telephone = filter_var($sender_telephone, FILTER_SANITIZE_NUMBER_INT);
    if ( strlen ( $sender_telephone ) < 11 || strlen ( $sender_telephone ) > 12 ) {
        $errors .= $errorMsg_Telephone_Invalid ;
    }
} else {
    $errors .= $errorMsg_Telephone_Empty ;
} 

// Input: Message
if ( $sender_message != "") {  
   $sender_message = filter_var($sender_message, FILTER_SANITIZE_STRING);  
    if ($sender_message == "") {  
        $errors .= $errorMsg_Message ;
    } elseif ( strlen ($sender_message) < 30 || strlen ($sender_message) > 3000 ) {
        $errors .= $errorMsg_Message ;
    }
} else {  
    $errors .= $errorMsg_Message ;
}

// Input: Human
if ( $human_response != "12" ) {
    $errors .= $errorMsg_Human_Incorrect ;
}

// Input: Callback date
$callback_date = filter_var($callback_date, FILTER_SANITIZE_STRING);
    if ( $callback_date != "" ) {
        list ($day,$month,$year) = explode ("/" ,$callback_date );
        if ( (is_numeric($day)) || (is_numeric($month)) || (is_numeric($year)) and strlen($year) == 4 ) {
            if (!checkdate($month, $day, $year)) 
                $errors .= $errorMsg_callbackDate ;
            } else {
                $errors .= $errorMsg_callbackDate ;
            }
        }
    if ( $callback_date != "" && $callback_time == "") {
        $errors .= $errorMsg_callbackDate_ifTime ;
    }


// Input: Callback Time
if ( $callback_time != "" && $callback_date == "" ) {
    $errors .= $errorMsg_callbackTime_ifDate ;
}

// If there are no errors - send the form.
if (!$errors) {

    $sender_ipAddress   = $_SERVER['REMOTE_ADDR'];
    $sender_browser     = $_SERVER['HTTP_USER_AGENT'];

    // E-mail headers
    $recipient_email    = "email@example.com" ;
    $headers            = "MIME-Version: 1.0" . "\r\n";
    $headers            .= "Content-type:text/html; charset: utf8" . "\r\n";
    $headers            .= "From:" . $sender_email . "\r\n";
    $headers            .= 'Reply-To: no-reply@domain.com' . "\r\n" ;

    // Setting the e-mail subject
    $subject            = "Message from the website." ;

    // For database scripting - replace new-line html with carriage return character - Array
    // Placeholders for array
    $sender_message_placeholders = array("\n") ;
    //Replace Values for array
    $sender_message_replaceValues = array("¶") ;
    // $sender_message stripped of new-lines, and replaced with nc-characters.
    $sender_message_stripped = str_replace($sender_message_placeholders, $sender_message_replaceValues, $sender_message) ;

    // Writing the e-mail body.

    //Head - Commmon
    $emailBody  = "
    <head>
    <style type \"text/css\">
    body                                { font-family: Helvetica, Arial ; font-size: 16px ; line-height: 20px ; color: #5e5e5e }
    h1                                  { font-size: 42px ; line-height: 42px ; color: #c1c1c1 }
    div.section                         { padding: 12px ; margin-bottom: 8px ; background-color: #f7f7f7 ; border: 1px solid #c8c8c8 }
    div.section#callback-details        { background-color: #f8e0e0 }
    div.section#callback-details label  { color: #df5c5c }
    div.part                            { margin-bottom: 8px }
    div.part:last-child                 { margin-bottom: 0 }

    label                               { margin: 0 ; font-size: 13px ; line-height: 20px ; font-weight: bold ; color: #80a553  }
    p                                   { margin: 0  }
    p.input-field#sender-message        { white-space: pre-line }

    div#dbImport                        { color: #a1a1a1!important  }
    div#dbImport p                      { font-size: 12px!important ; line-height: 19px ; white-space: normal!important }
    </style>
    </head> 

    <body>
    <html>

    <h1>Message</h1>

    <p class=\"input-field\" style=\"margin-bottom:12px\">A message has been sent.</p>
    " ;

    // If Callback Date/Time are provided
    if ( $callback_date != "" ) {
    $emailBody .= "
    <div class=\"section\" id=\"callback-details\">     
        <div class=\"part\">
            <label>Callback Date:</label>
            <p class=\"input-field\">$callback_date</p>
        </div><!-- !.part -->
        <div class=\"part\">
            <label>Callback Time:</label>
            <p class=\"input-field\">$callback_time</p>
        </div><!-- !.part -->
    </div><!-- !.section -->
    " ;
    }

    // Body - Common
    $emailBody .= "
    <div class=\"section\">     
        <div class=\"part\">
            <label>Name:</label>
            <p class=\"input-field\">$sender_name</p>
        </div><!-- !.part -->
        <div class=\"part\">
            <label>Company:</label>
            <p class=\"input-field\">$sender_company</p>
        </div><!-- !.part -->
        <div class=\"part\">
            <label>E-mail:</label>
            <p class=\"input-field\">$sender_email</p>
        </div><!-- !.part -->
        <div class=\"part\">        
            <label>Telephone:</label>
            <p class=\"input-field\">$sender_telephone</p>
        </div><!-- !.part -->
    </div><!-- !.section -->

    <div class=\"section\">     
        <div class=\"part\">
            <label>Message:</label>
            <p class=\"input-field\" id=\"sender-message\">$sender_message</p>
        </div><!-- !.part -->
    </div><!-- !.section -->

    <div class=\"section\" id=\"visitor-info\">
        <div class=\"part\">
            <label>Sender IP Address:</label>
            <p class=\"input-field\"><a href=\"http://network-tools.com/default.asp?prog=express&host=$sender_ipAddress\">$sender_ipAddress</a></p>
        </div><!-- !.part -->
        <div class=\"part\">
            <label>Sender Web Browser:</label>
            <p class=\"input-field\">$sender_browser</p>
        </div><!-- !.part -->
    </div><!-- !.section -->

    <div id=\"dbImport\">
        <p style=\"font-weight:bold\">IMPORTDB DATA</p>
        <p>NAME/COMPANY/EMAIL/TELEPHONE/MESSAGE/CALLBACK-DATE/CALLBACK-TIME</p>
        <p>#begin#$sender_name#$sender_company#$sender_email#$sender_telephone#$sender_message_stripped#$callback_date#$callback_time#end</p>
    </div>

    </body>
    </html>" ;

    /* Send the message using mail() function */
    mail($recipient_email, $subject, $emailBody, $headers) ;

    header('Location: http://www.example.com');


    // The message to display in the contact form success div
    $success_message = "
    <div id=\"successContainer\">
        <h4>Your message has been sent.  Thank you.</h4>
        <hr>
        <p>Someone will get back to you very shortly.  We aim to respond to all messages within 24 hours.  If your enquiry is super-duper-urgent, why not give us a ring?</p>
    </div>
    " ;

    // Reset the form if successful.        
    $sender_name = "" ;
    $sender_company = "" ;
    $sender_email = "" ;
    $sender_telephone = "" ;
    $sender_message = "" ;
    $human_response = "" ;
    $callback_date = "" ;
    $callback_time = "" ;


    // end 'if there are no errors'


} else {  // if there are errors with the users inputs
    $error_message = "
    <div class=\"errorContainer\" style=\"display: block\">
        <b style=\"display:block\">Oops... it looks like there is a problem with the data you have entered into the form.  Please correct the following errors:</b>
        <ul>
        $errors
        </ul>
    </div>" ;
    //echo $error_message ;
}
}




?>


<form id="contact-form" method="post" action="<?php $_SERVER['PHP_SELF'] ?>" class="contact-form clearfix">
<div id="contact_form"></div>
<h2>Contact Form</h2>
<?php if(isset($error_message)) { echo $error_message ; }  ;?>
<?php if(isset($success_message)) { echo $success_message ; }  ;?>
<div id="errorContainer" class="errorContainer">
    <b>Oops... it looks like there is a problem with the data you have entered into the form.  Please correct the following errors:</b>
    <ul />
</div><!--  !#errorContainer-callback  -->
<!--  BEGIN 4 INPUT FIELDS  -->
<div id="input-fields">
    <div id="name-company">
        <label>Name</label>
            <input name="input_name" tabindex="1" value="<?php echo htmlspecialchars($sender_name); ?>">
        <label>Company</label>
            <input name="input_company" tabindex="2" value="<?php echo htmlspecialchars($sender_company); ?>">
    </div><!--  ! #name-company -->
    <div id="email-telephone">
        <label>Email</label>
            <input name="input_email" tabindex="3" value="<?php echo htmlspecialchars($sender_email); ?>">
        <label>Telephone</label>
            <input name="input_telephone" tabindex="4" value="<?php echo htmlspecialchars($sender_telephone); ?>">
    </div><!--  ! #email-telephone  -->
</div><!--  ! #input-fields  -->
<!--  BEGIN MESSAGE CELL  -->
<div id="message">
    <label>Tell us a little about what you'd like talk about when we call you back.</label>
    <textarea name="input_message" id="input_message" tabindex="5"><?php if (isset($sender_message)) { echo htmlspecialchars($sender_message) ; } ?></textarea>
</div><!--  ! #message  -->
<div class="clearfix"></div>
<!-- BEGIN Bottom of Form (Date/Time/Human/Button)  -->
<div id="end">
    <!-- BEGIN DATE  -->
    <div id="cell1" class="cell">
        <label>When would you like us to get back to you?</label>
        <div>
            <input placeholder="Date" name="input_date" type="date" id="callback-date" tabindex="6" value="<?php echo $callback_date ; ?>">
        </div><!--  ! date input container  -->
        <!-- BEGIN CELL-TIME  -->
        <div>
            Time
            <select id="callback-time" name="input_time" tabindex="7">
                <?php if($_POST['submit'] == true) { ?>
                    <option value="<?php echo $callback_time ; ?>" selected="selected">
                    <?php echo $callback_time ; ?>
                    </option>
                <?php } else { ?>
                    <option value=""></option>
                <?php } ?>                  
                <option value=""></option>
                <option value="0900-1100">09:00-11:00</option>
                <option value="1100-1300">11:00-13:00</option>
                <option value="1300-1500">13:00-15:00</option>
                <option value="1500-1700">15:00-17:00</option>
            </select>
        </div><!--  ! subcell -->

    </div><!-- ! #cell1 -->
    <!-- BEGIN CELL-HUMANCHECK  -->
    <div id="cell2" class="cell human-check">
        <label><b> What is 3 + 9</b></label>
        <input id="human-result-callback" class="human" name="input_human" type="number" maxlength="2" tabindex="8"/>
    </div><!-- ! #cell2 .cell -->
    <!-- BEGIN CELL-BUTTON  -->
    <div id="cell3" class="cell">
        <input class="button" id="submit" name="submit" type="submit" value="Send Your Message">
    </div><!-- ! #cell3 .cell -->
</div><!--  ! #end  --> 
</form>

php - PHP邮件表单 - 在浏览器中单击后退按钮时防止重新提交

1 回答 1

编辑（＃1）

另外我建议你在你的表格中改变这个：

重写（按原样使用并更改电子邮件和标题位置的 2 个变量）

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