Question

这是我用于存储电子邮件的html和php。我该怎么做才能确保一个人实际输入电子邮件而不是随机字符。也许是代码，看看它是否有。＆＃34;扩展名＆＃34;或者＆＃34; @＆＃34;符号。另外，我如何防止重复的电子邮件条目。另外我想提醒网站访问者在提交时取得成功，我该如何实现呢？

任何帮助将不胜感激！谢谢！

HTML：

<div class="row">
    <div class="col-md-12">
        <div class="call-to-action text-center">
            <form class="form-inline margin-clear">
                <div class="form-group has-feedback">
                    <label class="sr-only" for="subscribe3">Email address</label>
                    <input type="email" class="form-control form-control-lg" id="subscribe3" placeholder="Enter email" name="subscribe3" required="">
                    <i class="fa fa-envelope form-control-feedback"></i>
                </div>
                <button type="submit" class="btn btn-lg btn-gray-transparent btn-animated margin-clear">Subscribe <i class="fa fa-send"></i></button>
            </form>
        </div>
    </div>
</div>

PHP：

<?php
//checking if data has been entered
if( isset( $_POST['subscribe3'] ) && !empty( $_POST['subscribe3'] ) )
{
    $data = $_POST['subscribe3'];
} else {
    header( 'location: index.html' );
    exit();
}

//setting up mysql details
$sql_server = 'localhost';
$sql_user = 'root';
$sql_pwd = '*PASSWORD*';
$sql_db = 'newsletter';

// USE A PREPARED STATEMENT LIKE SO FOR SAFETY
$mysqli = new mysqli( $sql_server, $sql_user, $sql_pwd, $sql_db ) or die( $mysqli->error );

 /* Make sure its an email */
if(filter_var($email, FILTER_VALIDATE_EMAIL)){
        $query = "INSERT IGNORE INTO email  (emails)
VALUES (?)";
$stmt = $conn->prepare($query);
if($stmt){
  $stmt->bind_param("s=",$data);
  $stmt->execute();
  $stmt->close();
  $successmessage = "successfully inserted email";
}

    //closing mysqli connection
    $mysqli->close();
  if(isset($_POST['submit'])){
     echo $successmessage;
  }

?>

Answer 1

你可以做多件事：

pregmatch ...只是一个快速正则表达式的例子，使用像rubular.com这样的东西来测试它

if（pregmatch（＆＃39; / ^ EXPRESSION $ /＆＃39;）{

echo＆＃34;有效＆＃34 ;;

{
或使用内置的电子邮件过滤器for php

http://php.net/manual/en/filter.filters.validate.php

<?php
    //checking if data has been entered
    if( isset( $_POST['subscribe3'] ) && !empty( $_POST['subscribe3'] ) )
    {
        $data = $_POST['subscribe3'];
    } else {
        header( 'location: index.html' );
        exit();
    }

    //setting up mysql details
    $sql_server = 'localhost';
    $sql_user = 'root';
    $sql_pwd = '*password*';
    $sql_db = 'newsletter';

    // USE A PREPARED STATEMENT LIKE SO FOR SAFETY
    $mysqli = new mysqli( $sql_server, $sql_user, $sql_pwd, $sql_db ) or die( $mysqli->error );

     /* Make sure its an email */
    if(filter_var($email, FILTER_VALIDATE_EMAIL)){
            $query = "INSERT IGNORE INTO email  (emails)
    VALUES (?)";
    $stmt = $conn->prepare($query);
    if($stmt){
      $stmt->bind_param("s=",$data);
      $stmt->execute();
      $stmt->close();
      $successmessage = "successfully inserted email";
    }
}
    //closing mysqli connection
    $mysqli->close();
  if(isset($_POST['submit'])){
     echo $successmessage;
  }

?>

就防止重复而言，INSERT IGNORE应该停止，只要你有一个好的PK集。否则，您可以运行SELECT快速查询以检查是否存在任何行，然后围绕准备好的插入执行if测试，例如if（$ numRows == 0）然后插入。我发送的内容也会显示成功的提交消息

如何过滤在html上输入表单的电子邮件？

1 个答案: