Question

我使用unset方法来清空它的数组但是当我再次初始化相同的数组以在我的代码中重用它时它会给出致命的错误

不支持的操作数类型

虽然其他unset工作正常，但只有一个整数类型值的数组有问题。任何形式的帮助将不胜感激

这是我的代码：

   <?php

for ($citycount = 0; $citycount < $count; $citycount ++) {
    $loc_qry = "SELECT `ID` as LocationID, `name` as LocationName FROM `territories` where     `formatID` = 43 and `territorylevelID` = 77 and `parentID` = '" . $cityID_arr[$citycount] . "'";
    $loc_qry_res = mysql_query($loc_qry) or die($loc_qry . "<br><br>" . mysql_error());

    while ($rs_loc = mysql_fetch_array($loc_qry_res)) {
        $location_id_arr[] = $rs_loc['LocationID'];
        $location_name_arr [] = $rs_loc['LocationName'];
    }

    $count_loc = count($location_id_arr);
    for ($i = 0; $i < $count_loc; $i++) {
        $location_scores = "SELECT ((SUM(sa.achievedScore) /  SUM(sa.totalScore)) * 100) as Score
                                               FROM `scoreanalysis` as sa 
                                               WHERE `formatID` = 43 and `waveID` = '" . $wave_id_arr[0] . "' and `territoryID` = '" . $location_id_arr[$i] . "'";
        $location_scores_res = mysql_query($location_scores);
        while ($res_location_score = mysql_fetch_array($location_scores_res)) {
            $location_scores_arr[] = intval($res_location_score['Score']);
        }
        if ($location_scores_arr[$i] != NULL) {
            $divider = $divider + 1;
        }

        $cityscore = $cityscore + $location_scores_arr[$i];

        //echo $location_id_arr[$i];
        //echo $location_name_arr[$i]."<br>";
    }
    $total = $cityscore / $divider;
    $city_qry = "SELECT `ID` as cityID, `name` as cityName FROM `territories` where  `ID` = '" . $cityID_arr[$citycount] . "'";
    $city_qry_rs = mysql_query($city_qry) or die($city_qry . "<br><br>" . mysql_error());


    while ($city_name = mysql_fetch_array($city_qry_rs)) {
        $cityname = $city_name['cityName'];
    }

    echo $cityname;
    echo intval($total) . "%";
    $total = 0;
    $cityscore = 0;
    unset($location_id_arr);
    unset($location_name_arr);

    $location_id_arr[] = array();
    $location_name_arr[] = array();

    unset($location_scores_arr);
    $location_scores_arr[] = array();

    $city_scores_arr [] = intval($total);
}

＆GT;

Answer 1

[]语法用于将元素添加到数组的末尾;它对您刚刚取消设置的变量无效。您应该在每次迭代开始时创建一个新数组，而不是尝试在循环的每次迭代结束时清除数组，即：

for ($citycount = 0; $citycount< $count; $citycount ++)
{   
    $location_id_arr = array();
    $location_name_arr = array();
    $location_scores_arr = array();

    $loc_qry = "SELECT `ID` as LocationID, `name` as LocationName FROM `territories` where     `formatID` = 43 and `territorylevelID` = 77 and `parentID` = '".$cityID_arr[$citycount]."'";
    $loc_qry_res = mysql_query($loc_qry) or die($loc_qry."<br><br>".mysql_error());
    ...
}

取消设置数组的所有元素并在php中重用它

1 个答案: