僅當有人成功提交表單時才如何運行PHP Mail Form腳本？

Question

在同一頁面上，我的PHP表單具有以下代碼。 實際上，問題在於，當有人打開網站時，它會自動運行PHP Mail()腳本並向我發送空郵件。

我希望它僅在有人成功提交表單后才起作用。 請幫忙。

<!--HTML FORM--><form method="post" name="contactform" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" onsubmit="return validateform()">
                <input type="text" name="fullname" class="fullname" placeholder="Full Name*"
       onfocus="this.placeholder = '';" onblur="if (this.placeholder == '') {this.placeholder = 'Full Name*';}">

                <input type="text" name="email" class="email" placeholder="Email Address*"
       onfocus="this.placeholder = '';" onblur="if (this.placeholder == '') {this.placeholder = 'Email Address*';}">

                <textarea placeholder="Your Message*:" name="message" class="message"
       onfocus="this.placeholder = '';" onblur="if (this.placeholder == '') {this.placeholder = 'Your Message*';}"></textarea>

       <input type="submit" name="submit" value="Submit" />
        </form><!--/HTML FORM> <!--Contact Form PHP-->
<?php
 // define variables and set to empty values
 $fullname = $email = $message = "";
 $subject="Message from Website Visitor:".test_input($_POST["fullname"]);
 $to="camadhusudanmishra@gmail.com";
 $headers = "From:".test_input($_POST["email"]);
 if ($_SERVER["REQUEST_METHOD"] == "POST") {
 $fullname = test_input($_POST["fullname"]);
 $email = test_input($_POST["email"]);
 $message = test_input($_POST["message"]);}

 function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;}
 $message = str_replace("\n.", "\n..", $message);

 mail($to,$subject,$message,$headers);

?>
 <!--/Contact Form PHP-->

驗證的JS代碼：

    function formValidation() {
    var fullname = document.contactform.fullname;
    var email = document.contactform.email;
    var message = document.contactform.message;

    if(validateName(fullname))
    {
    if(validateEmail(email))
    {
      if(validateMessage(message))
      {
      }
    }
  }
  return false;
}

function validateName(fullname)
  {
    var letters = /^[A-Za-z]+$/;
    if(fullname.value.match(letters) && fullname.value.length >= 3 && fullname.value.length <= 30)
    {
      return true;
    }
    else {
      alert('Please enter a valid name');
      return false;
    }
  }

function validateEmail(email)
  {
    var mailformat = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
    if(email.value.match(mailformat))
    {
      return true;
    }
    else
    {
      alert("You have entered an invalid email address!");
      return false;
    }
  }

function validateMessage(message)
  {
    if(message.value.length >=5 && message.value.length <=300)
    {
      alert('Form Succesfully Submitted');
      window.location.reload();
      return true;
    }
    else
    {
      alert("Please type a valid message.");
      return false;
    }
}

Answer 1

您可以使用以下代碼。

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

  // Add here function
 function test_input($data) {
 $data = trim($data);
  $data = stripslashes($data);
 $data = htmlspecialchars($data);
 return $data;}


// define variables and set to empty values
$fullname = $email = $message = "";
$subject="Message from Website Visitor:".test_input($_POST["fullname"]);
$to="camadhusudanmishra@gmail.com";
$headers = "From:".test_input($_POST["email"]);
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$fullname = test_input($_POST["fullname"]);
$email = test_input($_POST["email"]);
$message = test_input($_POST["message"]);}


 $message = str_replace("\n.", "\n..", $message);

mail($to,$subject,$message,$headers);
 }
 ?>
  <!--/Contact Form PHP-->

 <!--HTML FORM-->
 <form method="post" name="contactform" action="<?php echo    htmlspecialchars($_SERVER['PHP_SELF']); ?>" onsubmit="return validateform()">
            <input type="text" name="fullname" class="fullname" placeholder="Full Name*"
   onfocus="this.placeholder = '';" onblur="if (this.placeholder == '') {this.placeholder = 'Full Name*';}">

            <input type="text" name="email" class="email" placeholder="Email Address*"
   onfocus="this.placeholder = '';" onblur="if (this.placeholder == '') {this.placeholder = 'Email Address*';}">

            <textarea placeholder="Your Message*:" name="message" class="message"
   onfocus="this.placeholder = '';" onblur="if (this.placeholder == '') {this.placeholder = 'Your Message*';}"></textarea>

   <input type="submit" name="submit" value="Submit" />
    </form><!--/HTML FORM> <!--Contact Form PHP-->