PHP创建JSON数组数组（来自MySQL的数据）

Question

i've been searching all over and can't get any solution to work... this is my code, the problematic area is how to create 1 large array of per-sql-row array: (the commented-out line is the one causing the error).

$result = mysqli_query($con, "SELECT * FROM  `Orders` WHERE  `userID` = " . $objData->userid . " ORDER BY  `recievedDate` DESC LIMIT 10");
        $resArray = array();    
        if ($result->num_rows > 0) {
            while($row = $result->fetch_row())
            {
                $tempArr = array("orderid" => $row[0], "orderdate" => $row[2], "orderstatus" => $row[4]);
                //$resArray = array_push((array)$resArray, (array)$tempArr);  <== problematic line commented out
            }
            echo json_encode($resArray);        
        } else {                
            echo "";    
        }

thanks!

Answer 1

除了其他重要方面，你$resArray = array_push((array)$resArray, (array)$tempArr)分配array_push $resArray = array_push((array)$resArray, (array)$tempArr) ，所以json_encode($resArray)得到一个数字而不是你需要的数组。

Answer 2

The simple answer is to push your $temparr array to $resArray like this:

$resArray[] = $tempArr;

Note you could also use array_push() if you really wanted to.

Not sure what all your query is returning, but did you know you could also just get your query results as an array to begin with?

$resArray = $result->fetch_array(MYSQLI_ASSOC);

If your query is returning more than you need in your array, just limit the query:

$result = mysqli_query($con, "SELECT orderid, orderdate, orderstatus FROM  `Orders` ...");
$resArray = $result->fetch_array(MYSQLI_ASSOC);

Done!