Inserting Data from Grabbing URL Parameter - PHP PDO - php

Question

I have, for example, this URL with spesific paramater in the end:
http://example.com/index.php?id_user=84759832475
The value [id_user=**84759832475**] is created by myself and I have declared it inside my script.
$txtemail = strip_tags(isset($_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));
In this case, the question mark ?????? makes me confused of what to write.
I'm sorry if my English is too bad to explain this question.

Answer 1

Just add another named placeholder inside that other prepared statement, just like the others:
$txtemail = isset($_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));
}