下面的代码都很棒.在名为submit.php的文件上,用户可以通过表单输入提交.表单转到submit2.php,其中一些代码将提交内容插入
MySQL数据库.到现在为止还挺好.
问题在于:一旦用户登陆了submit2.php,如果用户刷新浏览器,则会出现“确认表单重新提交”弹出框.然后,如果用户在弹出窗口中点击“继续”,则提交将重新提交到MySQL数据库.
如何在submit2.php上执行以下操作:
>如果刷新浏览器,则不会显示弹出窗口.
>提交将不会重新提交到数据库.
提前致谢,
约翰
在submit.php上:
echo '
Story Title:Link:
';
在submit2.php上:
if (isLoggedIn() == true)
{
$remove_array = array('http://www.', 'http://', 'https://', 'https://www.', 'www.');
$cleanurl = str_replace($remove_array, "", $_POST['url']);
$cleanurl = strtolower($cleanurl);
$cleanurl = preg_replace('/\/$/','',$cleanurl);
$cleanurl = stripslashes($cleanurl);
$title = $_POST['title'];
$uid = $_POST['uid'];
$title = mysql_real_escape_string($title);
$title = stripslashes($title);
$slug = str_replace(' ', '-', $title);
echo '-'.$site1.'-';
$cleanurl = mysql_real_escape_string(trim($cleanurl));
$site1 = 'http://' . $cleanurl;
$displayurl = parse_url($site1, PHP_URL_HOST);
function isURL($url1 = NULL) {
if($url1==NULL) return false;
$protocol = '(http://|https://)';
$allowed = '[-a-z0-9]{1,63}';
$regex = "^". $protocol . // must include the protocol
'(' . $allowed . '\.)'. // 1 or several sub domains with a max of 63 chars
'[a-z]' . '{2,6}'; // followed by a TLD
if(eregi($regex, $url1)==true) return true;
else return false;
}
if(isURL($site1)==true)
mysql_query("INSERT INTO submission VALUES (NULL, '$uid', '$title', '$slug', '$cleanurl', '$displayurl', NULL)");
else
echo "
Not a valid URL.
\n";
} else {
// user is not loggedin
show_loginform();
}