PHP 用于在 while 命令中生成代码的变量

Question

我一直在构建 Google 图表，并且有很多 'fun' 让我的 SQL 命令满足 Google 的要求，但是，我终于完成后，现在需要继续处理更复杂的部分。可变数量的元素。

我的图表基于用户拥有的商店数量，我一直在使用基于迄今为止拥有三个商店的虚拟 set-up，但用户可以拥有 n 存储并需要调整我的 google 图表以适应这个变量输入。

到目前为止，我做得很好，我使用查询来提取用户拥有的商店数量，然后将其替换为 SQL 查询，因此我们 return 正确的数字Google 图表数据集中的行数，我可以将商店名称替换为 header，只是 PHP 我发现谷歌搜索将 SQL 输出写入Google 我正在苦苦挣扎的图表预期格式。

function drawChart1() {
    var data = google.visualization.arrayToDataTable([
        ['Month', 'Store A', 'Store B', 'Store C'],
    <?php 
        $sql = "SELECT
                DATE_FORMAT(date_submitted,'%b-%y') AS 'Month',
            CAST(((SUM(CASE WHEN LOWER(`q3`) = 'no' AND store_list = 1 THEN 1 ELSE 0 END)/SUM(CASE WHEN store_list = 1 THEN 1 ELSE 0 END))*100) as decimal (10,1)) AS 'Store A',
            SUM(CASE WHEN LOWER(`q3`) = 'no' AND store_list = 1 THEN 1 ELSE 0 END) AS 'Store A_Base',
            CAST(((SUM(CASE WHEN LOWER(`q3`) = 'no' AND store_list = 2 THEN 1 ELSE 0 END)/SUM(CASE WHEN store_list = 2 THEN 1 ELSE 0 END))*100) as decimal (10,1)) AS 'Store B',
            SUM(CASE WHEN LOWER(`q3`) = 'no' AND store_list = 2 THEN 1 ELSE 0 END) AS 'Store B_Base',
            CAST(((SUM(CASE WHEN LOWER(`q3`) = 'no' AND store_list = 3 THEN 1 ELSE 0 END)/SUM(CASE WHEN store_list = 3 THEN 1 ELSE 0 END))*100) as decimal (10,1)) AS 'Store C',
            SUM(CASE WHEN LOWER(`q3`) = 'no' AND store_list = 3 THEN 1 ELSE 0 END) AS 'Store C_Base'
        FROM data 
                WHERE store_list IN (" . $user_stores . ")
                GROUP BY YEAR(date_submitted), MONTH(date_submitted)
                ORDER BY YEAR(date_submitted) ASC, MONTH(date_submitted) ASC";

        $Sat = mysqli_query($conn,$sql);
        while($row = mysqli_fetch_array($Sat)){
            echo "['".$row['Month']."',".$row['Store A'].",".$row['Store B'].",".$row['Store C']."],";
        }
    ?> 
]);

所以，一切正常，给了我三个虚拟商店 1、2、3（商店 A、商店 B 和商店 C），并制作了一个漂亮的小图表。所以我将其调整为以下内容：

    <?php
    //dynamically build chart queries
    $sql_prep = "SELECT d.store_list AS NUMB, s.name AS NAME FROM data d INNER JOIN store_list s ON d.store_list=s.store_id WHERE d.status != '' AND d.store_list IN (" . $user_stores . ") GROUP BY store_list";
    $sql_code = $conn->query($sql_prep);
        while($row = $sql_code->fetch_assoc()) {
        $select = $select . "CAST(((SUM(CASE WHEN LOWER(`q3`) = 'no' AND store_list = " . $row['NUMB'] . " THEN 1 ELSE 0 END)/SUM(CASE WHEN store_list = " . $row['NUMB'] . " THEN 1 ELSE 0 END))*100) as decimal (10,1)) AS  '" . $row['NAME'] . "',SUM(CASE WHEN LOWER(`q3`) = 'no' AND store_list = " . $row['NUMB'] . " THEN 1 ELSE 0 END) AS '" . $row['NAME'] . "_Base',";
        $cstores = $cstores . "'" . $row['NAME'] . "', " ;
        $carray = $carray . ",\".$row['" . $row['NAME'] . "'].\"";
        }
    ?>
...
function drawChart1() {
    var data = google.visualization.arrayToDataTable([
    ['Month', <?php echo $cstores ?>],
    <?php 
        $sql = "SELECT
            " . $select . "
            DATE_FORMAT(date_submitted,'%b-%y') AS 'Month'
        FROM data 
        WHERE store_list IN (" . $user_stores . ")
        GROUP BY YEAR(date_submitted), MONTH(date_submitted)
        ORDER BY YEAR(date_submitted) ASC, MONTH(date_submitted) ASC";

        $Sat = mysqli_query($conn,$sql);
        while($row = mysqli_fetch_array($Sat)){
             echo "['".$row['Month']."'".$carray."],";
        }
    ?> 

]);

它几乎就在那里，$select 工作，然后我更换了 $cstores，它仍然工作，但我被困在 $carray 上。如果我回应它，它完美地构建了进入那里所需的字符串，创建 ,".$row['Store A'].",".$row['Store B'].",".$row['Store C']." 但这不起作用所以显然 PHP 不支持（我真的不知道，我只是不断地用不同的方式戳它直到它起作用）

所以我现在卡住了。我需要将商店的 n 列写到构建 Google 图表的数组中，但我对 PHP 的理解很差。如果您不知道商店 A、商店 B 等的 header 列，是否有更好的写法 echo "['".$row['Month']."',".$row['Store A'].",".$row['Store B'].",".$row['Store C']."],";？

Answer 1

知道了，有点变通，但更新了 SQL 并将输出更改为 Google 图表：

<?php
//dynamically build chart queries
$sql_prep = "SELECT d.store_list AS NUMB, s.name AS NAME FROM data d INNER JOIN store_list s ON d.store_list=s.store_id WHERE d.status != '' AND d.store_list IN (" . $user_stores . ") GROUP BY store_list";
$sql_code = $conn->query($sql_prep);
$select = '';
    while($row = $sql_code->fetch_assoc()) {
        $select .= ", CAST(((SUM(CASE WHEN LOWER(`q3`) = 'no' AND store_list = " . $row['NUMB'] . " THEN 1 ELSE 0 END)/SUM(CASE WHEN store_list = " . $row['NUMB'] . " THEN 1 ELSE 0 END))*100) as decimal (10,1)) AS  '" . $row['NAME'] . "' ";
        $cstores = $cstores . "'" . $row['NAME'] . "', " ;

    }
?>

<!--https://google-developers.appspot.com/chart/interactive/docs/gallery/linechart-->
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">

  google.charts.load('current', {'packages':['corechart']});
  google.charts.setOnLoadCallback(drawChart1);

  function drawChart1() {
var data = google.visualization.arrayToDataTable([
['Month', <?php echo $cstores ?>],
<?php 

    $sql = "SELECT
            QUOTE(DATE_FORMAT(date_submitted,'%b-%y')) AS 'Month'
            ". $select ."
        FROM data 
        WHERE store_list IN (" . $user_stores . ")
        GROUP BY YEAR(date_submitted), MONTH(date_submitted)
        ORDER BY YEAR(date_submitted) ASC, MONTH(date_submitted) ASC";

    $Sat = mysqli_query($conn,$sql);
    foreach( $Sat as $key => $array ) {
        echo("[");
        foreach( $array as $attribute => $value ) {
            echo $value. ",";
        }
        echo("],");
    }
?>

PHP 用于在 while 命令中生成代码的变量

PHP variable used to generate code in a while command

php

sql

charts

google-visualization