如果mysql查询没有返回PEAR PHP，则难以回显错误消息

Question

I am struggling to echo an error message stating 'No results' when my mysql query returns nothing. I am using PEAR. Here is what I have at the moment.

while($rows =& $output->fetchRow()) {
if (numRows($query)== 0){
   echo 'No results';
}
else {
 echo 'data found';
}

}

Any help will be greatly appreciated, thanks for checking out my question.

Answer 1

If there are no results, fetchRow won't return anything, which means the loop doesn't get executed at all, which means the code inside the loop won't either. The logic is:

if numRows == 0
    echo error
else
    while fetchRow
        echo result