<!DOCTYPE HTML>
<html>
<head>
<style>
.error {color: #FF0000;}
</style>
</head>
<body>
<?php
session_start();
$emailErr = $emailErr1 = "";
$email = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["email"])) {
$emailErr = "Email邮箱不能为空！";
$emailErr1 = "<script>alert('邮箱不能为空')</script>";
}
else {
$email = test_input($_POST["email"]);
$_SESSION['email']=$_POST['email'];
$emailErr1 = "<script>alert('邮箱正确');parent.location.href='phpmail.php';</script>";
if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)){
$emailErr = "无效的 email 格式";
$emailErr1 = "<script>alert('请填写正确的邮箱，如82958399@qq.com！')</script>";
}
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
E-mail:
<input type="text" name="email">
<span class="error">*
<?php
echo $emailErr;
echo $emailErr1;
?>
</span>
<br><br>
<input type="submit" name="submit" value="立刻发送邮件">
</form>
</body>
</html>
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