ho questo codice: <?php
if(isset($_GET['user']) && !empty($_GET['user'])){
$user=$_GET['user'];
} else {
$user=$_SESSION['user_id'];
}
$my_id=$_SESSION['user_id'];
$username=getuser($user, 'username');

?>
<h3><?php echo $username; ?></h3>
<?php
if($user != $my_id){
$check_frmd_query=mysql_query("SELECT id FROM fmds WHERE (user_one='$my_id' AND user_two='$user' OR (user_one='$user' AND user_two='$my_id'))");
if(mysql_num_rows($check_frmd_query) == 1){
echo "Already Freand | Onfriend $username";
} else {
$from_query=mysql_query("SELECT id FROM frnd_req WHERE from='$my_id' AND to='$user'");
$to_query=mysql_query("SELECT id FROM frnd_req WHERE from='$user' AND to='$my_id'");
if(mysql_num_rows($from_query) == 1){
echo "Ignore | Accett";
} else if (mysql_num_rows($to_query) == 1){
echo "Cancel Request";
} else {
echo "Send Friend Request";
}
}
}

?>

la pagina mi dovrebbe dare il profilo della persona selezionata per poi aggiungerla ad una lista amici ma mi da questo errore:
Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\profile.php on line 36

Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\profile.php on line 38

ovvero a queste righe:
$from_query=mysql_query("SELECT id FROM frnd_req WHERE from='$my_id' AND to='$user'");
$to_query=mysql_query("SELECT id FROM frnd_req WHERE from='$user' AND to='$my_id'");
if(mysql_num_rows($from_query) == 1){

dove puo essere il problema?, non riesco a capire, spero che la domanda così vada bene, ciao