Here is your whole database connection:
$dbusername = "yourusername";
$dbpassword = "yourpassword";
$dbname ="yourdatabsename";
$whatever = "search string";
$dbh=mysql_connect ($servername, $dbusername, $dbpassword);
$query = "SELECT * FROM table where whatever = '$whatever'";
$result = mysql_db_query ($dbname,$query);
//error checking
if($result == false){
echo mysql_errno().":".mysql_error()."<BR>";
exit;
}
//This is where you asign value to variable:
$variable = mysql_result($result,0,"field_name");