PDO - Test Of Empty Results - php

Question

I have a query that should look for an entry. If it's not in the database then enter in the data. Otherwise it returns back the data and they can update any fields. If there is an entry it will be only one. This works great if the entry is in the table. But I've tried checking for empty rows, doing row_count, etc and doesn't seem to work. Right now I just have this in the code(sanitized to remove company table information):
$query1 = " SELECT Number, Notes, Qty1, Qty2 FROM test.notes ";
$query1 .= " WHERE Number = '$searchnumber' ";
$result1 = $conn1->query($query1);
$conn1 = null;
if($result1==null)
{
echo "Result is null</p>\n";
return 0;
}
else
{
echo "Result is not null</p>\n";
return $result1;
}
If I take out the if check what I seem to get back is if it's found it returns the values correctly. If it's not found the result seems to be the query string itself. The check doesn't work. Probably because it returns back the query string if it's not found.
I know it's something simple but just haven't found it.

Answer 1

// if available in database
$query="SELECT Number, Notes, Qty1, Qty2 FROM test.notes WHERE Number='".$searchnumber."'";
$qnt = $conn1->query($query);
$coun = count($qnt->fetchAll());
if($coun > 0){
// available
echo "Result is available</p>\n";
}else{
//not available
echo "Result is not available</p>\n";
}
i Think you need something like this.
if this is not working fine, try another aproach
$queryi = $conn1->prepare("SELECT Number, Notes, Qty1, Qty2 FROM test.notes WHERE Number='".$searchnumber."' ");
$queryi->execute();
$qn= $queryi->fetchAll(PDO::FETCH_ASSOC);
foreach ($qn as $row => $data) {
$in_use = $data['Number'];
//echo $in_use ;
}
// evaluate
if($in_use == NULL){
//not avilable
}else{
// available
}

Answer 2

I suggest doing something like this:
Establish your query
$query1 = " SELECT Number, Notes, Qty1, Qty2 FROM test.notes ";
$query1 .= " WHERE Number = '$searchnumber' ";
See if there's a result for the query, and no error
if ($res = $conn1->query($sql)) {
/* Check the number of rows that match the SELECT statement */
if ($res->fetchColumn() > 0) {
/* Issue the real SELECT statement and work with the results */
$sql = "SELECT name FROM fruit WHERE calories > 100";
foreach ($conn->query($sql) as $row) {
print "Name: " . $row['NAME'] . "\n";
}
}
/* No rows matched -- do something else */
else {
print "No rows matched the query.";
}
}

Answer 3

After some trial and error I got this to work:
$result1 = $conn1->query($query1);
$count = $result1->fetchColumn();
if($count == "")
{
// echo "Result is null</p>\n";
return "0";
}
else
{
// echo "Result is not null</p>\n";
$result1 = $conn1->query($query1);
return $result1;
}
I had to change the setup to include:
$conn1->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, TRUE);
Probably not a clean way but it works for now. Thanks for all the help.