这是答案：
$sql="SELECT * FROM Blar";
$result = MysqL_query($sql);
$combinedResults = array();
while ($row = MysqL_fetch_array($result)) {
$combinedResults[$row['cat']][] = array(
'LineID' => $row['lineID'],
'Qty' => $row['qty'],
'SetCost' => $row['Setcost'],
'MonCost' => $row['Moncost'],
'Postcode' => $row['postcode']
);
};
//print_r($combinedResults);
print_r($combinedResults['Apps'][0]['Qty']);
感谢您的帮助@Dereleases
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