Question

我有一个PHP PDO查询，它从数据库中选择年，月和日。它还计算每天的行数：

    SELECT  
    dateYear, dateMonth, dateDay, 
    count(dateDay) AS count_days
    FROM just_ink 
    WHERE dateMonth = :month AND dateYear = :year AND deleted = 0  
    GROUP BY dateYear, dateMonth, dateDay

回应结果时：

 foreach ($result as $subResult) {
     foreach ($subResult as $row) {
        $year = $row['dateYear'];
        $month = $row['dateMonth'];
        $day = $row['dateDay'];
        $count = $row['count_days'];
        echo $month . " " . $day . " " . $year . " " . $count . " lines, ";
    }
}

返回如下值：

June 7 2016 3 lines, June 8 2016 1 lines,

这意味着，6月7日有3种形式，6月8日有1种形式。

现在进行格式化，我使用的是Highcharts基本折线图。数据需要以这种方式格式化：

<script>
$(function () {
    $('#container').highcharts({
    title: {
        text: 'Monthly New Forms',
        x: -20 //center
    },
    xAxis: {
    title: {
                text: 'Day of the Month'
    },
        categories: [
        '1', '2', '3', '4', '5',
        '6', '7', '8', '9', '10',
        '11', '12', '13', '14', '15',
        '16', '17', '18', '19', '20',
        '21', '22', '23', '24', '25',
        '26', '27', '28', '29', '30',
        '31' 
        ]
    },
    yAxis: {
        title: {
            text: 'Month of June'
        },
        plotLines: [{
            value: 0,
            width: 1,
            color: '#808080'
        }]
    },
    tooltip: {

    },
    legend: {
        layout: 'vertical',
        align: 'right',
        verticalAlign: 'middle',
        borderWidth: 0
    },
    series: [{
        name: 'Number of New Forms Per Day',
        data: [1, 2, 3, 4, 5, 6]
    }]
});
});
</script>

其中类别是x轴标题，而系列数据是每天的频率。所以，如果我想代表

June 7 2016 3 lines, June 8 2016 1 lines,

系列数据需要看起来像

0, 0, 0, 0, 0, 0, 3, 1, 0, etc.

有什么想法吗？

Answer 1

首先创建一个包含每月每天元素的数组：

$counts = array_fill(1, 31, 0);

然后在你的循环中，填写当天的条目：

foreach ($subresult as $row) {
    $day = $row['dateDay'];
    $counts[$day] = $row['count_days'];
}
$counts = array_values($counts); // because json_encode treats it as an object if indexes don't start at 0
echo json_encode($counts);

我不确定您选择dateYear和dateMonth的原因，因为这些是查询的输入。你不需要在循环中设置这些变量，因为它们总是相同的。

Answer 2

$highchartdata = []

foreach ($subResult as $row) {
    $highchartdata[$row['dateDay']] = $row['count_days'];
  }

echo json_encode($highchartdata);

从服务器获取上述json数据

 obj = JSON.parse(data);// parse the json data
 for (i = 1; i <=31; i++) { 
    if(!obj[i]) // if ith key is not defined make it 0
     obj[i]=0;
  }

console.log(obj);

如何正确格式化PHP foreach循环？

2 个答案: