how to display blank query using PHP?

[Anon]

Hi,

In php, when I try to retrieve data from database using

if (isset($result)) {
while ($row = mysql_fetch_array($result))
{
echo $row["book"];
}

But sometimes my database may not contain the data matched the query, how can you do that using PHP?

thanks

[Anon]

Use mysql_num_rows($result)