MySQL- Unable to jump to row 0 on MySQL result index

Question

I have got an old site that has recently been displaying an error which is weird as its been untouched for some time. I get the following:

Unable to jump to          


        

Answer 1

Try analysing the result before fetching it. If result is empty, skip fetching.

$result = mysql_query("SELECT * FROM table1");
if (!$result || !mysql_num_rows($result)) {
    die('Empty set.');
}
while ($row = mysql_fetch_array($result)) {
    // Your code here
}