mysql_num_rows giving error “mysql_num_rows() expects parameter 1 to be resource”

Question

public function doesUserExist($u) {

    $this->dbConnect();

    mysql_select_db($this->database);

    $sUser = mysql_real_escape_string($u);

    $query = \"SEL         


        

Answer 1

You should use the mysql_query before getting the number of rows.

Follow the Link below: http://php.net/manual/en/function.mysql-num-rows.php

For example :

$query = "SELECT username FROM $this->table WHERE username='$sUser'";
$result = mysql_query($query);  
$num_rows = mysql_num_rows($result);