Question

我正在尝试在我的注册页面上使用电子邮件验证，但即使是合法的电子邮件地址，if(filter_var($_POST['Email'], FILTER_VALIDATE_EMAIL) !== false)也始终返回false，例如：bob.smith@hotmail.com

PHP代码：

    <?php require 'Assets/Connections/Connections.php';

session_start();

if(isset($_POST['Register'])) 
  {
        //whether the firstname is blank
        if ($_POST['First_Name'] == '') 
    {
      $_SESSION['First_NameErr'] = "First Name is required.";
    }
    //whether the lastname is blank
    if ($_POST['Last_Name'] == '') 
    {
      $_SESSION['Last_NameErr'] = "Last Name is required.";
    }
    //whether the email is blank
    if($_POST['Email'] == '')
    {
      $_SESSION['EmailErr1'] = "E-mail is required.";
    }
    else
    {
      //whether the email format is correct
        if(filter_var($_POST['Email'], FILTER_VALIDATE_EMAIL) !== false)
      {
        // Return Success - Valid Email
        $Email = mysqli_real_escape_string($con, $_POST['Email']);
        $sql1 = "SELECT * FROM user 
                WHERE email = '$Email'";
        $result1 = mysqli_query($con, $sql1) 
                  or die(mysqli_error());
       if (mysqli_num_rows($result1) > 0)
        {
        $_SESSION['EmailErr2'] = "This Email is already used.";
        }
      }
      else
      {
        // Return Error - Invalid Email
        $_SESSION['EmailErr3'] = "Your email is not valid.";
      }
    }
    //whether the password is blank
    if($_POST['Password'] == '')
    {
    $_SESSION['PasswordErr'] = "Password is required.";
    }
    //if an error is created, the user is re-directed to a blank registration form
    if(isset($_SESSION['First_NameErr']) || isset($_SESSION['Last_NameErr']) || isset($_SESSION['EmailErr1']) || isset($_SESSION['EmailErr2']) || isset($_SESSION['EmailErr3']) || isset($_SESSION['PasswordErr']))
    {
      echo "Error";
      var_dump(filter_var($_POST['Email'], FILTER_VALIDATE_EMAIL));
    #header("Location: Register.php");
    #exit;
    }
    else
    {
    $FName = mysqli_real_escape_string($con, $_POST['First_Name']);
    $LName = mysqli_real_escape_string($con, $_POST['Last_Name']);
    $Email = mysqli_real_escape_string($con, $_POST['Email']);
    $PW = mysqli_real_escape_string($con, $_POST['Password']);
    $StorePassword = password_hash($PW, PASSWORD_BCRYPT, array('cost' => 10));

    $sql = $con->query("INSERT INTO user (Fname, Lname, Email, Password)
                        Values('$FName', '$LName', '$Email', '$StorePassword')") 
                        or die(mysqli_error());

    header('Location: LogIn.php');
    die();
    }
  }
?>

Html表格：

<!doctype html>
<html>
<head>
<link href="Assets/CSS/Master.css" rel="stylesheet" type="text/css" />
<link href="Assets/CSS/Menu.css" rel="stylesheet" type="text/css" />
<meta charset="utf-8">
<title>Register</title>
</head>

<body>
<div class="Container">
  <div class="Header"></div>
  <div class="Menu">
    <div id="Menu">
      <nav>
        <ul class="cssmenu">
          <li><a href="FrontPage.php">Home</a></li>
          <li><a href="Register.php">Register</a></li>
          <li><a href="LogIn.php">LogIn</a></li>
        </ul>
      </nav>
    </div>
  </div>
  <div class="CentreBody">
    <form id="RegisterForm" name="RegisterForm" method="post">
      <div class="FormElement">
        <input type="text" name="First_Name" required="required" class="TField" id="First_Name" placeholder="First Name">
      </div>
      <div class="FormElement">
        <input type="text" name="Last_Name" required="required" class="TField" id="Last_Name" placeholder="Last Name">
      </div>
      <div class="FormElement">
        <input type="email" name="Email" required="required" class="TField" id="Email" placeholder="Email">
      </div>
      <div class="FormElement">
        <input type="password" name="Password" required="required" class="TField" id="Password" placeholder="Password">
      </div>
      <div class="FormElement">
        <input type="submit" name="Register" class="button" id="Register" value="Register">
      </div>
    </form>
  </div>
  <div class="Footer"></div>
</div>
</body>
</html>

Answer 1

我改变了第一行。我还将修剪功能添加到$ _POST [＆＃39;电子邮件＆＃39;] $ _POST [＆＃39; Email＆＃39;] = trim（$ _ POST [＆＃39; Email＆＃39;]）;

电子邮件的验证是好的，唯一可能失败的方法是电子邮件是否有空间。喜欢＆＃34; bob.smith@hotmail.com＆lt;空间＆gt;＆＃34;

我希望这可以提供帮助！

<?php


#if($_POST['Email'] == ''){
if(!empty($_POST['Email']) && isset($_POST['Email'])){
    $_SESSION['EmailErr1'] = "E-mail is required.";
}else{
    //whether the email format is correct
    $_POST['Email'] = trim($_POST['Email']);

    if(filter_var($_POST['Email'], FILTER_VALIDATE_EMAIL) !== False){
        $Email = mysqli_real_escape_string($con, $_POST['Email']);
        $sql1 = "SELECT * FROM user WHERE email = '$Email'";
        $result1 = mysqli_query($con, $sql1) or die(mysqli_error());
        if (mysqli_num_rows($result1) > 0){
            $_SESSION['EmailErr2'] = "This Email is already used.";
        }
    }else{
    // Return Error - Invalid Email
        $_SESSION['EmailErr3'] = "Your email is not valid.";
    }
}



//if an error is created, the user is re-directed to a blank registration form
if(isset($_SESSION['EmailErr1']) || isset($_SESSION['EmailErr2']) || isset($_SESSION['EmailErr3'])){
    echo "Error";
    var_dump(filter_var($_POST['Email'], FILTER_VALIDATE_EMAIL));
}else{

    $Email = mysqli_real_escape_string($con, $_POST['Email']);
    INSERT into table....
}

?>

filter_var（$ variable，FILTER_VALIDATE_EMAIL）始终生成false

1 个答案: