It seem not fetch the $_POST - php

Question

I'm stuck in login page. From home,user will login (form send to check_login) and from check_login user will be directed to page based on their role. However, I cannot pass through the login page. I mean I keep getting the error message from header('location: 1.php?error=1');
fyi, i've successfully connected to db. The data is there. But if I echo oci_num_rows, the result is 0..
Here is my code login.php
<form action="check_login.php" method="post" name="login">
<div class="error"><?php include('error-handler.php'); ?></div>
<p> Matric / Staff ID :</p>
<p><input type="text" name="id" size="20" maxlength="10" onkeypress="return isNumberKey(event)" required value=""/></p>
<p>Password :</p>
<p><input type="password" name="password" id="password" size="20" maxlength="8" min="6" required value="" />
<script type="text/javascript">
//add a show password checkbox
new ShowPasswordCheckbox(document.getElementById("password"));
//test the submitted value
document.getElementById('login').onsubmit = function()
{
alert('pword = "' + this.pword.value + '"');
return false;
};
</script>
</p>
<p><input type="submit" name="submit" value="Login"/></p> </form>
and here is my check_login.php
<?php
ob_start();
// Inialize session
session_start();
require_once('connection.php');
//if the login form is submitted
if(isset($_POST['submit']) && !empty($_POST['submit']))
{
$id = $_POST['id'];
$pass = $_POST['password'];
$stmt2= oci_parse($conn, "SELECT * FROM user1 WHERE id = '$id'")or die(oci_error());
$check2 = oci_execute($stmt2);
//Gives error if user dosen't exist
$check3 = oci_num_rows($stmt2);
if ($check3 == 0)
{
header('location: 1.php?error=1'); //the msg will be: you are not eligible user.
exit();
}
else
{
while($info2=oci_fetch_array($stmt2,OCI_ASSOC+OCI_RETURN_NULLS))
{
//gives error if the password is wrong
if ($pass != $info2['password'])
{
header('location: 1.php?error=2'); //password mismatch with id
exit();
}
else
{
// if login is ok then we add a cookie
$_SESSION['id'] = $_POST['id'];
$_SESSION['password'] = $_POST['password'];
$hour = time() + 86400;
setcookie(ID_site, $_SESSION['id'], $hour);
setcookie(Pass_site, $_SESSION['password'], $hour);
//then redirect them to the members area
if ($info2['role']=='admin')
{
header('Location: homeAdmin.php');
}
elseif ($info2['role']=='staff')
{
header('Location: homeStaff.php');
}
elseif ($info2['role']=='student')
{
header('Location: homeStudent.php');
}
else
{
header('Location: 1.php');
}
} //end else
} //end while
}//end else
}// end if submit
else
{
header('Location: 1.php');
}
?>
Please share your opinion or pls correct if i'm wrong. Thank you. :)

Answer 1

From PHP manual 'oci_num_rows' : http://php.net/manual/en/function.oci-num-rows.php
This function does not return number of rows selected! For SELECT
statements this function will return the number of rows, that were
fetched to the buffer with oci_fetch*() functions.