Unable to Fill multidimensional arrays with sql rows - php

Question

I'm currently having trouble saving individual rows into a multi-dimensional arrays. The current code below (php) does not create a multi-dimensional array even though $Prow should be an array itself. The echo at the end of the code returns no values, any help?
EDIT: ps, the query works perfectly.
$sql = "SELECT * FROM Products WHERE Tags LIKE '%atmega%'";
$result = $conn->query($sql);
$xx = 0;
while($Prow = $result->fetch_assoc()){
$PArray[$xx] = $Prow;
$xx += 1;
}
echo "<script type='text/javascript'>alert('".$PArray[0][0]."');</script>";

Answer 1

If you want to know what your array looks like then do a print_r() on it.
Oh and you should be checking for errors after a call to ->query()
$sql = "SELECT * FROM Products WHERE Tags LIKE '%atmega%'";
$result = $conn->query($sql);
if ( $result === FALSE ) {
echo $conn->error;
exit;
}
$xx = 0;
while($Prow = $result->fetch_assoc()){
$PArray[$xx] = $Prow;
$xx += 1;
}
print_r($PArray);
To simplify your code you could do
$sql = "SELECT * FROM Products WHERE Tags LIKE '%atmega%'";
$result = $conn->query($sql);
if ( $result === FALSE ) {
echo $conn->error;
exit;
}
while($row = $result->fetch_assoc()){
$PArray[] = $row;
}
print_r($PArray);
But to get a numeric index on the returned array rather than an associative array use ->fetch_row()
$sql = "SELECT * FROM Products WHERE Tags LIKE '%atmega%'";
$result = $conn->query($sql);
if ( $result === FALSE ) {
echo $conn->error;
exit;
}
while($row = $result->fetch_row()){
$PArray[] = $row;
}
print_r($PArray);

Answer 2

Assuming mysqli, $result->fetch_assoc() returns an associative array, not a zero indexed array. The indexes are your column headers. Try just $result->fetch_row() if you want an enumerated array.