PHP表單電子郵件驗證

Question

即使電子郵件地址無效，我的郵件表單仍在發送電子郵件。 例如，如果我將電子郵件填寫為“ bob”，然后單擊“提交”，則我的javascript驗證程序會給出警告消息，但電子郵件仍會通過。 它最終以bob@mydomain.com出現在我的垃圾郵件框中

我如何驗證電子郵件地址，如果不驗證則阻止提交？

我是php新手。

HTML：

 <div id="emailform">
                <h2>Confirm your purchase information</h2>
                <hr>
                <form method="post" name="contactform" action="mail_form.php" id="submit">
                <p>
                <label for='name'>Your Name:</label> <br>
                <input type="text" name="name">
                </p>
                <p>
                <label for='email'>Email Address:</label> <br>
                <input type="text" name="email">
                </p>
                <p>
                <label for='purchasecode'>Purchase Code:</label> <br>
                <input type="text" name="purchasecode">
                </p>
                <p>
                <label for='vendor'>Vendor Name:</label> <br>
                <select name="vendor">
                  <option value="" selected="selected"></option>
                  <option value="Amazon" >Amazon</option>
                  <option value="Barnes&Noble" >Barnes &amp; Noble</option>
                  <option value="Family Christian" >Family Christian</option>
                  <option value="Christianbook" >Christianbook.com</option>
                  <option value="LifeWay" >LifeWay</option>
                  <option value="BAM" >Books-A-Million</option>
                  <option value="Mardel" >Mardel</option>
                </select>
                </p>
                <button type="submit" id="submitbutton" name="submit" value="Submit" class="mainButton">SUBMIT</button><br>
                </form>

<!--            Code for validating the form
                Visit http://www.javascript-coder.com/html-form/javascript-form-validation.phtml
                for details -->
                <script type="text/javascript">
                var frmvalidator  = new Validator("contactform");
                frmvalidator.addValidation("name","req","Please provide your name");
                frmvalidator.addValidation("email","email","Please enter a valid email address");
                frmvalidator.addValidation("vendor","dontselect=000");
                frmvalidator.addValidation("purchasecode","maxlen=50");
                </script>
            </div>

PHP：

<?php
ini_set('display_errors',1);
 error_reporting(E_ALL);

if(!isset($_POST['submit']))
{
  //This page should not be accessed directly. Need to submit the form.
  echo "error; you need to submit the form!";
}
$name = $_POST['name'];
$email = $_POST['email'];
$purchasecode = $_POST['purchasecode'];
$vendor = $_POST['vendor'];


//Validate first
if(empty($_POST['name'])  ||
   empty($_POST['email']) ||
   empty($_POST['purchasecode']) ||
   empty($_POST['vendor']))
{
    echo "All fields are required.";
exit;
}

if(IsInjected($email))
{
    echo "Bad email value!";
    exit;
}

$email_from = $email;
$email_subject = "GDFY Purchase Confirmation";
$email_body = "New purchase confirmation from $name.\n".
    "Here are the details:\n\n Name: $name \n\n Email: $email \n\n Purchase Code: $purchasecode \n\n Vendor: $vendor";

$to = "idc615@gmail.com";//<== update the email address

$headers = "From: $email_from \r\n";
$headers .= "Reply-To: $email_from \r\n";
//Send the email!
mail($to,$email_subject,$email_body,$headers);
//done. redirect to thank-you page.
header('Location: index.html');

// echo "success";


// Function to validate against any email injection attempts
function IsInjected($str)
{
  $injections = array('(\n+)',
              '(\r+)',
              '(\t+)',
              '(%0A+)',
              '(%0D+)',
              '(%08+)',
              '(%09+)'
              );
  $inject = join('|', $injections);
  $inject = "/$inject/i";
  if(preg_match($inject,$str))
    {
    return true;
  }
  else
    {
    return false;
  }
}

?>

使用Javascript：

  $('#submit').submit(function() { // catch the form's submit event
      $.ajax({ // create an AJAX call...
          data: $(this).serialize(), // get the form data
          type: $(this).attr('method'), // GET or POST
          url: $(this).attr('action'), // the file to call
          success: function(response) { // on success..
              $('#emailform').html("<h2 style='text-align:center;'>Thank you!</h2><hr><p style='text-align:center;'>Thank you for submitting your purchase information.<br>We will send your free gifts soon!</p>"); // update the DIV
          }
      });
      return false; // cancel original event to prevent form submitting
  });

Answer 1

您可以使用filter_var：

if( filter_var('bob@example.com', FILTER_VALIDATE_EMAIL) )
{
    Do_stuff();
}

Answer 2

我建議在前端和后端進行過濾。 前端可防止對服務器造成不必要的打擊並提供更有效和及時的反饋，后端可捕獲前端允許通過的任何內容（因為可以繞過它）

我選擇的前端腳本是jQuery Ketchup

在后端， filter_var可以正常工作，如果您使用的是舊版本的PHP，則regex可以正常工作。

Answer 3

這就是我所使用的，並且使用Ajax和jQuery效果很好。 歡迎您使用它並進行修改以適合您。

HTML表單和PHP處理程序都包括在內。

HTML表格

<!DOCTYPE html>

<head>

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">

$(document).ready(function(){

    $('#submit').click(function(){
        $('#success').hide(1);
        $.post("ajax_handler.php", $("#contact").serialize(),  function(response) {
            $('#success').html(response);
            $('#success').show(1000);
        });
        return false;

    });

});
</script>

<style>

html {
/*    height: 100%; */

height:auto;
}
body {
    background:#000;
/*  background: url(bg.png);
    background-repeat:repeat;*/
    margin: 0px;
    padding: 0px;
    height: 100%;
    color: #fff;
    font-family: Proxima, sans-serif;;
}


#empty {
    display:block;
    clear:both;
    height:150px;
    width:auto;
    background:none;
    border:none;
}


#contact ul{
    margin-left:10px;
    list-style:none;
}


#contact ul li{
    margin-left:0px;
    list-style:none;
}

</style>

</head>

<body>

<form id="contact" action="" method="post">
<ul>
    <li>
        <label for="name">Name:</label><br>
        <input id="name" type="text" name="name"  width="250" size="35" required/>
    </li>
    <li>
        <label for="email">Email:</label><br>
        <input id="email" type="text" name="email" width="250" size="35" required/>
    </li>
<br><br>
    <li>
        <label for="message">Message:</label><br>
        <textarea id="message" name="message" rows="6" cols="40" required></textarea>
    </li>
    <li><input type="button" value=" SEND " id="submit" /><input type="reset" value="Reset" name="reset">
<div id="success" style="color: yellow;"></div></li>
</ul>


</form>
</body>

</html>

處理程序（ajax_handler.php）

<?php

if((empty($_POST['name'])) || (empty($_POST['email'])) || (empty($_POST['message']))){

die("<b>ERROR!</b> All fields must be filled.");

}

$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];

$name = strtolower($name);
$name = ucwords($name);

$to = 'email@example.com';
$subject = 'Website message from: '.$name;
$message = 'FROM: '.$name." \nEmail: ".$email."\nMessage: \n".$message;
$headers = 'From: your_email@example.com' . "\r\n";

if (filter_var($email, FILTER_VALIDATE_EMAIL)) { 
mail($to, $subject, $message, $headers); 
echo "Thank you! Your email was sent $name.";
echo "<br>";
echo "This is the email you entered: <b>$email</b>";
}else{
// echo var_dump($_POST);
echo "<b>ERROR!</b> Invalid E-mail. Please provide a valid email addres. Example: myEmail@example.com";
echo "<br>";
echo "The email <b>$email</b> you entered, is not valid.";
}

?>

Answer 4

$email = test_input($_POST["email"]); if (!preg_match("/([\\w\\-]+\\@[\\w\\-]+\\.[\\w\\-]+)/",$email)) { $emailErr = "Invalid email format"; }

你可以用這個我已經嘗試過了

Answer 5

Javascript validation
<script type="text/javascript">
var a = document.contact_form.txt_phoneno.value;
        if (a!="")
        {
        if(isNaN(a))
        {
        alert("Enter the valid Mobile Number(Like : 9566137117)");
        document.contact_form.txt_phoneno.focus();
        return false;
        }
        if((a.length < 10) || (a.length > 15))
        {
        alert(" Your Mobile Number must be 10 to 15 Digits");
        document.contact_form.txt_phoneno.select();
        return false;
        }
        }
</script>

Answer 6

試試這個preg比賽

$email = test_input($_POST["email"]);
if (!preg_match("/^[\w-]+[@]+[a-z]+\.+[a-z]*$/", $email)) {
  return false; 
  //exit;
}