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$nid = $_GET['nid'];
$file_type=".png";
$file_name = time('Ymd');
$file_pic = $_FILES["pic"]["name"];
$url = "http://localhost/dbd/images/";
move_uploaded_file($_FILES["pic"]["tmp_name"],"../images/" .$file_name.$file_type);
$sql = "update xs_news set pic = '".$url.$file_name.$file_type."' where nid = '$nid'";
if(execute_data($sql)) {
echo "ok";
} else {
echo "error";
}