如何在PHP中将数组元素转换为simplae元素 - How to convert an array element to simplae element in PHP?

我的问题听起来可能有些笨拙，但这正是我想要做的。我有一个从SQL查询中获得的名为$data的数组。作为参考，我在这里放了前两个元素：

Array
(
    [0] => Array
        (
            [test_pack_id] => 9f27643023a83addd5eed41c4aade840
            [test_pack_name] => Bank Exams Complete Combo
            [test_pack_desc] => This Package contains 24 tests of Reasoning, English and Quantitative Aptitude + 2 Mega tests of all 3 subjects.
Total Tests in this Package : 26
            [test_pack_type_id] => 3
            [test_pack_image] => 
            [test_pack_validity_year] => 0
            [test_pack_validity_month] => 3
            [test_pack_validity_days] => 0
            [test_pack_plan] => paid
            [test_pack_price] => 399.00
            [test_pack_no_tests] => 0
            [test_pack_publish] => yes
            [test_pack_sold] => 1
            [test_pack_created_staff_id] => ff8d4a5ea6bf11dce105aa2fa7b959b8
            [test_pack_updated_staff_id] => 81c4e3607c7e56bbf5461ef150437675
            [test_pack_created_date] => 1347127051
            [test_pack_updated_date] => 1349235701
            [test_pack_purchase_date] => 1351228594
        )
    [1] => Array
        (
            [test_pack_id] => e7e95de96987cc7c89c1f0183110fb38
            [test_pack_name] => Bank Reasoning
            [test_pack_desc] => This package contains 8 tests on Reasoning.
            [test_pack_type_id] => 3
            [test_pack_image] => 
            [test_pack_validity_year] => 0
            [test_pack_validity_month] => 3
            [test_pack_validity_days] => 0
            [test_pack_plan] => free
            [test_pack_price] => 0.00
            [test_pack_no_tests] => 0
            [test_pack_publish] => yes
            [test_pack_sold] => 4
            [test_pack_created_staff_id] => ff8d4a5ea6bf11dce105aa2fa7b959b8
            [test_pack_updated_staff_id] => ff8d4a5ea6bf11dce105aa2fa7b959b8
            [test_pack_created_date] => 1347127196
            [test_pack_updated_date] => 1347127387
            [test_pack_purchase_date] => 1363775709
        )
)

现在我必须在这个数组中插入一个新的键值对。为此，我将向数据库发出一个查询。将为数组$data的每个元素激发查询。它的代码如下：

foreach($data as $data1) {  
            $sql  = " SELECT COUNT(*) as package_count FROM ". TBL_USER_PACKAGES. " WHERE pack_id ='".$data1['test_pack_id']."' AND pack_assign_date  ";  
            $sql .= " BETWEEN UNIX_TIMESTAMP(CURDATE()) and UNIX_TIMESTAMP(DATE_ADD(CURDATE(),INTERVAL 1 day)) ";
            $this->mDb->Query( $sql);
            $data1['package_sold_count'] = $this->mDb->FetchArray(MYSQL_FETCH_SINGLE);
}

但是当我访问这个查询的结果时，我得到的数组格式如下：

事实上，我想把数组作为一个新的键值对，而不是一个新关联数组，如下所示：

    Array(
    [0] => Array
            (
                [test_pack_id] => 9f27643023a83addd5eed41c4aade840
                [test_pack_name] => Bank Exams Complete Combo
                [test_pack_desc] => This Package contains 24 tests of Reasoning, English and Quantitative Aptitude + 2 Mega tests of all 3 subjects.
    Total Tests in this Package : 26
                [test_pack_type_id] => 3
                [test_pack_image] => 
                [test_pack_validity_year] => 0
                [test_pack_validity_month] => 3
                [test_pack_validity_days] => 0
                [test_pack_plan] => paid
                [test_pack_price] => 399.00
                [test_pack_no_tests] => 0
                [test_pack_publish] => yes
                [test_pack_sold] => 1
                [test_pack_created_staff_id] => ff8d4a5ea6bf11dce105aa2fa7b959b8
                [test_pack_updated_staff_id] => 81c4e3607c7e56bbf5461ef150437675
                [test_pack_created_date] => 303
                [test_pack_updated_date] => 1349235701
                [test_pack_purchase_date] => 256
                [package_sold_count] => 4
)

有人能帮助我实现这一点吗？提前谢谢。

下面这样简单的操作应该可以很好地完成您想要的操作：

<?php
    foreach ($array as &$subArray) {
        $subArray["package_sold_count"] = $subArray["package_sold_count"]["package_count"];
    }
    unset($subArray);
?>

或者在分配时简单地进行不同设置：

foreach($data as $data1) {  
            $sql  = " SELECT COUNT(*) as package_count FROM ". TBL_USER_PACKAGES. " WHERE pack_id ='".$data1['test_pack_id']."' AND pack_assign_date  ";  
            $sql .= " BETWEEN UNIX_TIMESTAMP(CURDATE()) and UNIX_TIMESTAMP(DATE_ADD(CURDATE(),INTERVAL 1 day)) ";
            $this->mDb->Query( $sql);
            //First assign a variable
            $dbFetch = $this->mDb->FetchArray(MYSQL_FETCH_SINGLE); 
            //Then refer to it
            $data1['package_sold_count'] = $dbFetch["package_count"]; 
}

当您在以下行中获取新的密钥/值对时：

 $data1['package_sold_count'] = $this->mDb->FetchArray(MYSQL_FETCH_SINGLE);

实际上，您正在获取一个数组，即使它只是一个元素，所以这就是您所看到的。

相反，这样做：

$temp = $this->mDb->FetchArray(MYSQL_FETCH_SINGLE);
$data1['package_sold_count'] = $temp['package_count']; // assumes associative array

这可能也可行，但我偶尔会遇到把代码包装得太紧的问题。

$data1['package_sold_count'] = $this->mDb->FetchArray(MYSQL_FETCH_SINGLE)['package_count'];