Curl not giving any response back - php

Question

I am using curl get the response back from a file on different server..
Curl code:
$url="http://example.com/trck.php?adrs=yy";
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);
return $result;
trck.php Code:
$url=mysqli_real_escape_string($link,$_GET['adrs']);
$sql="SELECT * FROM product where site = '$url'";
$res=mysqli_query($link,$sql) or die( mysqli_error() );
$row=mysqli_fetch_assoc($res);
if(mysqli_num_rows($res)==0 || $row['status']==0)
{
return no;
}
else
{
return yes;
}
but there is no response form it.
Help will be appreciated.

Answer 1

$url=mysqli_real_escape_string($link,$_GET['adrs']);
$sql="SELECT * FROM product where site = '$url'";
$res=mysqli_query($link,$sql) or die( mysqli_error() );
$row=mysqli_fetch_assoc($res);
if(mysqli_num_rows($res)==0 || $row['status']==0)
{
echo 'no';
}
else
{
echo 'yes';
}
also:
$url="http://example.com/trck.php?adrs=yy";
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);
echo $result;
you have to echo the returned transfer from curl.