插入数据 - PHP PDO

Question

我有，例如，该网址与最终spesific paramater：

http://example.com/index.php?id_user=84759832475 

价值[id_user=**84759832475**]由自己创造，我已经宣布它在我的脚本中。

$txtemail = strip_tags(isset($_POST['txtemail'])) ? strip_tags($_POST['txtemail']) : ''; 
$txtemail=strip_tags($txtemail); 
$txtname = strip_tags(isset($_POST['txtname'])) ? strip_tags($_POST['txtname']) : ''; 
$txtname =strip_tags($txtname); 
$id_user="84759832475"; 

$stmt="SELECT * FROM table_name WHERE emailz=:txtemail AND namez=:txtnamez"; 
$pgdata = $myDb->prepare ($stmt); 
//bind semua variabel login dalam parameter 
$pgdata->bindParam(':txtname', $txtname, PDO::PARAM_STR,31); 
$pgdata->bindParam(':txtemail', $txtemail, PDO::PARAM_STR,31); 
//eksekusi statemen prepare tadi 
$pgdata->execute(); 
//cek & lihat hasil 
//$cekdata = $pgdata->fetchColumn(); 
if(!$pgdata->rowCount()> 0){ 
    $pgdata = $myDb->prepare('INSERT INTO table_name (namez,emailz,userid) VALUES (:txtname,:txtemail,?????)'); 
    $pgdata->execute(array(':namez'=>$txtname, ':emailz'=>$txtemail, ':userid'=>$id_user)); 

在这种情况下，问号??????让我困惑写什么。 如果我的英语不好解释这个问题，我很抱歉。

Answer 1

只需要添加另外一个名为占位符，其他准备好的声明中，只是和其他人一样：

$txtemail = isset($_POST['txtemail']) ? strip_tags($_POST['txtemail']) : ''; 
$txtname = isset($_POST['txtname']) ? strip_tags($_POST['txtname']) : ''; 
$id_user = "84759832475"; 

$stmt = 'SELECT COUNT(id) AS total FROM table_name WHERE emailz = :txtemail AND namez = :txtnamez'; 
$pgdata = $myDb->prepare($stmt); 

$pgdata->bindParam(':txtnamez', $txtname, PDO::PARAM_STR); 
$pgdata->bindParam(':txtemail', $txtemail, PDO::PARAM_STR); 
$pgdata->execute(); 

$result = $pgdata->fetch(PDO::FETCH_ASSOC); 

if($result['total'] > 0){ 

    $pgdata = $myDb->prepare(' 
     INSERT INTO table_name (namez,emailz,userid) 
     VALUES (:txtname, :txtemail, :userid) 
    '); 
    // just add another named placeholer :userid 

    $pgdata->execute(array(':txtname'=> $txtname, ':txtemail'=> $txtemail, ':userid' => $id_user)); 
}