那个老师一条一条赋值的太繁琐了，怎么用foreach来实现，我写的有问题？
代码如下
foreach($fields as $v){
$date[]=$_POST[$v];
$date1=implode(',',$data);
print_r($date1);
$data = htmlspecialchars($data);
$data = mysqli_real_escape_string($con, $data);
}报错
$title=$_POST['title'];
$author=$_POST['author'];
$description=$_POST['description'];
$content=$_POST['content'];
$dateline =time();
