php - 按添加的变量对数组进行排序

Question

将变量添加到 mysql 查询的末尾。 现在我需要能够按关联值进行排序。有人可以帮忙吗？我尝试了几种不同的排序方法。

$result2 = mysqli_query($datacon,
    "SELECT * FROM spreadsheet 
        WHERE brand = '$brand' 
            AND package = '$package' 
            AND HIDE_FROM_SEARCH = '0' 
        GROUP BY ACCTNAME $pages->limit");

echo mysqli_error($datacon);
while($row = mysqli_fetch_array($result2)) {
    $lat_B=$row['LATITUDE'];
    $long_B=$row['LONGITUDE'];

    $lat_A = round($lat_A,2);
    $long_A = round($long_A,2);
    $lat_B = round($lat_B,2);
    $long_B = round($long_B,2);
    $distance = new calcDist($lat_A, $long_A, $lat_B, $long_B);
    $distance = $distance->calcDist($lat_A, $long_A, $lat_B, $long_B);
    $distance = round($distance,2);
    $locationSort=array($row);
    $locationSort['distance']=$distance;

    FOR EACH SOMETHING?
}

我修改了之前的帖子以反射(reflect)我对答案的使用。

$result2 = mysqli_query($datacon,"SELECT * FROM spreadsheet WHERE brand = '$brand'
                AND package = '$package' and HIDE_FROM_SEARCH = '0' GROUP BY ACCTNAME $pages->limit");

                echo(mysqli_error($datacon));
                class sortBydistance
                {
                    function sortBydistance($a, $b) {
                        if ($a['distance'] == $b['distance']) {
                            return 0;
                        }
                        return ($a['distance'] < $b['distance']) ? -1 : 1;
                    }
                }
                while($row = mysqli_fetch_array($result2))
                {
                        $lat_B=$row['LATITUDE'];
                        $long_B=$row['LONGITUDE'];

                    $lat_A = round($lat_A,2);
                    $long_A = round($long_A,2);
                    $lat_B = round($lat_B,2);
                    $long_B = round($long_B,2);
                    $distance = new calcDist($lat_A, $long_A, $lat_B, $long_B);
                    $distance = $distance->calcDist($lat_A, $long_A, $lat_B, $long_B);
                    $distance = round($distance,2);


                }
                $locationSort=array($row);
                $locationSort['distance']=$distance;
                uasort($locationSort, array($this, "sortBydistance"));
                print_r($locationSort);

Answer 1

可能您没有正确检索 $bran 和 $package 变量..

$result2 = mysqli_query($datacon,
    "SELECT * FROM spreadsheet 
        WHERE brand = '".$brand."' 
            AND package = '".$package."' 
            AND HIDE_FROM_SEARCH = '0' 
        GROUP BY ACCTNAME ".$pages->limit.");