Why is php skipping the if statement? - php

Question

The basics of what I want to do is check the user values.
If they are there return true and go back to the page otherwise return false and print null values.
$query = sprintf("SELECT * from Users where username = ? and password = ?");
$params1 = array( $username, $password);
$stmt = sqlsrv_query($conn, $query, $params1);
if ($stmt === false)
{
die(print_r(sqlsrv_errors(), true));
}
$Users = array();
while ($row = sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC)) {
$username1 = $row['username'];
$password1= $row['password'];
}
$Users["username"] = $username1;
$Users["password"] = $password1;
//echo json_encode($Users);
echo "you are here";
if ($username1==null)
{
return false;
echo "null values";
}
else {
return true;
if (!empty($_SERVER['HTTP_REFERER']))
header("Location: ".$_SERVER['HTTP_REFERER']);
else
echo "No referrer.";
}
echo "\n\nyou're at the end though";
sqlsrv_free_stmt($stmt);
sqlsrv_close( $conn );
}
else {
echo "Connection could not be established.<br />";
die( print_r( sqlsrv_errors(), true));
}
As you can see I am trying to debug the program and see where the program is going. It gets to the point
//echo json_encode($Users);
echo "you are here";
After that nothing else seems to work and I don't know why.

Answer 1

Directly after your working echo you have:
if ($username1==null)
{
return false;
...
}
else
{
return true;
...
}
...
So nothing after this will get executed because of the return statements. From the manual:
If called from within a function, the return statement immediately
ends execution of the current function, and returns its argument as
the value of the function call. return also ends the execution of an
eval() statement or script file.
If called from the global scope, then execution of the current script
file is ended.
Also note that you should check for the number of rows returned from your query, now you will get undefined variable warnings if no row was found.

Answer 2

before you enter thw while statment you need to check the row count in if statment if its not 0 return true else return false something like this
if(sqlsrv_num_rows($stmt)
{
// your code be here
return true;
}else{
// your code be here
return false;
}
http://php.net/manual/en/function.sqlsrv-num-rows.php