3

我正在尝试从 php 联系表单中获取用户 IP 地址，我有以下代码，但我想知道以这种方式使用 clean_string 向自己发送 IP 地址是否有效？

<?php

session_start();




if(isset($_POST['fullname'])) {

include 'freecontact2formsettings.php';

function died($error) {
    echo "Sorry, but there were error(s) found with the form you submitted. ";
    echo "These errors appear below.<br /><br />";
    echo $error."<br /><br />";
    echo "Please go back and fix these errors.<br /><br />";
    die();
}

if(!isset($_POST['fullname']) ||
    !isset($_POST['Address1']) ||
    !isset($_POST['city']) ||   
    !isset($_POST['Postcode']) ||
    !isset($_POST['contactnum']) ||
    !isset($_POST['emailaddress'])







    ) {
    died('Sorry, there appears to be a problem with your form submission.');        
}
$ip = $_SERVER['HTTP_CLIENT_IP']; 
$ansb0_from = $_POST['fullname']; // required
$ansb1_from = $_POST['Address1']; // required
$ansb3_from = $_POST['city']; // required   
$ansb4_from = $_POST['Postcode']; // required
$ansb5_from = $_POST['contactnum']; // required
$ansb6_from = $_POST['emailaddress']; // required


$error_message = "";


$email_message = "PHP CONTACT FORM:\r\n";

function clean_string($string) {
  $bad = array("content-type","bcc:","to:","cc:");
  return str_replace($bad,"",$string);
}


$email_message .= "Forename: ".clean_string($ansb0_from)."\r\n";
$email_message .= "Address 1: ".clean_string($ansb1_from)."\r\n";
$email_message .= "City: ".clean_string($ansb3_from)."\r\n";
$email_message .= "Postcode: ".clean_string($ansb4_from)."\r\n";
$email_message .= "Contact Number: ".clean_string($ansb5_from)."\r\n";
$email_message .= "Email Address: ".clean_string($ansb6_from)."\r\n";
$email_message .="IP Address: ".clean_string($ip)."\n\n"; 











$headers = 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
mail($email_to, $email_subject, $email_message, $headers);
header("Location: $thankyou");
?>
<script>location.replace('<?php echo $thankyou;?>')</script>
<?php
}
die();
?>

还，

$ip = $_SERVER['HTTP_CLIENT_IP'];

是在联系表单脚本页面上，而不是用户输入信息的实际 form.php，我认为这就是我出错的地方吗？

4

2 回答 2

10

您不希望表单本身包含 IP。这样它就可以被显示、编辑和弄乱。相反，只需使用以下命令在服务器端捕获它：

$_SERVER['REMOTE_ADDR'];

顺便说一句，谷歌搜索这个问题应该返回十亿个有效的结果。只是一个快速的提醒。

于 2013-01-31T01:52:23.437 回答
1

您想同时检查$_SERVER["REMOTE_ADDR"]和$_SERVER["HTTP_X_FORWARDED_FOR"]，因为如果用户位于代理服务器后面，则后者可能是必需的。

您可以在此处阅读更多信息：https ://stackoverflow.com/a/3003233/666468

于 2013-01-31T01:53:33.077 回答