filter_var（$变量，FILTER_VALIDATE_EMAIL）总是产生错误

我想用我的注册页面上的电子邮件验证，但if(filter_var($_POST['Email'], FILTER_VALIDATE_EMAIL) !== false)始终，即使是合法的电子邮件地址，如返回false：[email protected]

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表单：

<!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>

来源

2016-02-09 user2258597

尝试微调'$ _ POST [ '电子邮件']'测试，如'filter_var期间（修剪（$ _ POST [ '电子邮件'] L），FILTER_VALIDATE_EMAIL）;' –

做'回声$ _ POST ['电子邮件'];'看看它显示的是什么 –

检查错误。我们不知道HTML表单是什么样子的，或者是否开始了会话。 –

我改变了第一道防线。并且我将修剪功能添加到$ _POST ['Email'] $ _POST ['Email'] = trim（$ _ POST ['Email']）;

验证电子邮件是好的，唯一可能会失败的方式是电子邮件有空间。像“[email protected] < space>”

我希望这可以帮助！

<?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.... 
} 

?>

来源

2016-02-09 13:06:07 wu4m4n

添加修剪不起作用。 – user2258597

你的逻辑在第一行是不正确的，你可以说'if（empty（$ _ POST ['Email']））'你正在测试，以确保在OP检查它是否不是'吨。 –

filter_var（$变量，FILTER_VALIDATE_EMAIL）总是产生错误

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