可能重复：
如何在PHP 中验证电子邮件地址
我想知道有谁能帮我。
我需要验证以下代码的电子邮件地址，但遇到问题。
<?php
if ($_POST) {
$expected = array('name', 'email', 'emailmessage');
$validation = array(
'name' => 'Please provide your full name',
'email' => 'Please provide your valid email address',
'emailmessage' => 'Please provide message'
);
$errors = array();
$output = array();
foreach($expected as $key) {
$input = htmlspecialchars($_POST[$key]);
if (array_key_exists($key, $_POST)) {
if (empty($_POST[$key])) {
$errors[$key] = $validation[$key];
} else {
$output[$key] = $_POST[$key];
}
} else {
$errors[$key] = $validation[$key];
}
}
if (!empty($errors)) {
$array = array('error' => true, 'fields' => $errors);
} else {
// PROCESS FORM
// ---------------------------------------------------------
// BEGIN EDITING
// ---------------------------------------------------------
$to = "qakbar@hotmail.co.uk"; //This is the email address messages will be sent to
$web_name = "My Test Web Form"; //This is the name of your website that will show in your email inbox
//get IP address
$ip = $_SERVER['REMOTE_ADDR'];
//make time
$time = time();
$date = date("r", $time);
// ---------------------------------------------------------
// END EDITING
// ---------------------------------------------------------
$emailmessage = trim($emailmessage);
$emailmessage = nl2br($emailmessage);
$emailmessage = htmlspecialchars($emailmessage);
$emailmessage = wordwrap($emailmessage, 70);
//Visible form elements
$name = $_POST['name']; //Sender's name
$email = $_POST['email']; //Sender's email
$emailmessage = htmlspecialchars($_POST['emailmessage']); //Sender's message
//Setting up email
$subject = "New Message from $web_name";
$message = "
New message from $name <br/><br/>
Message:<br />
$emailmessage
<br/>
<br/>
Email: $email<br />
IP:</strong> <span style='"color:#990000;'">$ip</span><br />
Date:</strong> $date
";
$header = 'MIME-Version: 1.0' . "'r'n";
$header .= 'Content-type: text/html; charset=utf-8' . "'r'n";
$header .= 'From:'. $email . " 'r'n";
$sent = mail($to, $subject, $message, $header);
//$message = '<div id=message>You have successfully subscribed to our newsletter</div>';
$array = array('error' => false, 'message' => $message);
}
echo json_encode($array);
}
我希望电子邮件在$validation数组中进行验证，因为我的消息通过该数组传递，并且需要电子邮件验证来完成同样的操作。
我试图使用以下内容，但不知道该放在哪里，也不知道如何称呼它。
if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
// email is valid
} else {
// email is invalid
}
任何帮助都是值得的。
感谢
您可以这样使用它：
filter_var($email, FILTER_VALIDATE_EMAIL) or die("Email wrong.");
就在你分配了这个确切的变量之后：
$email = $_POST['email'];
当然，这种结构可以更合理，也可以发出更好的错误通知。但听起来您似乎需要先对PHP进行更多的一般性实践。
您的代码有一个奇怪之处：
$input = htmlspecialchars($_POST[$key]);
if (array_key_exists($key, $_POST)) {
在检查密钥是否存在之前，您已经在使用该密钥。同样，$input变量不会在代码中再次使用，因此这是一行无用的代码。
也许，这段代码会对您有所帮助。试试看。
<?php
if($_SERVER['REQUEST_METHOD']=='POST'){
$name = $_POST['uname'];
$email = $_POST['email'];
$valid_arr = array();
$error_arr = array();
if($name == ''){
$error_arr['name'] = 'Required';
}
else if(!preg_match('/^[a-zA-A]+$/',$name)){
$error_arr['name'] = 'Please put correct value';
}
else{
$valid_arr['name'] = $name;
}
if($email == ''){
$error_arr['email'] = 'Required';
}
else if(!preg_match('/^[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+'.([a-zA-Z]{2,4})$/',$email)){
$error_arr['email'] = 'Exm.- john@gmail.com';
}
else{
$valid_arr['email'] = $email;
}
if(count($error_arr) == 0){
header('location: success.php');
}
else{
echo 'Error in Loading';
}
}
?>
<html>
<head>
</head>
<body>
<form action="<?php $_SERVER['PHP_SELF'];?>" method="POST">
<table>
<tr>
<td><label>User Name :</label></td>
<td><input type="text" name="uname" value="<?php echo $valid_arr['name'];?>"/></td>
<td class="error"><?php echo $error_arr['name'];?></td>
</tr>
<tr>
<td><label>Email :</label></td>
<td><input type="text" name="email" value="<?php echo $valid_arr['email'];?>"/></td>
<td class="error"><?php echo $error_arr['email'];?></td>
</tr>
<tr>
<td><input type="submit" name="save" value="Submit"/></td>
</tr>
</table>
</form>
</body>
</html>