如何在图表中显示每天的订单总额

Question

我似乎无法正常工作，我需要在图表上显示每天的订单总额。

我通过以下代码使 Open Flash 图表正常工作：

---

<?php

// Settings for Database Connection
include_once($root_folder_path . "includes/common.php");
include_once("./admin_common.php");
include_once("./ofc_chart_library/open-flash-chart.php");

$sql = "SELECT * from orders ORDER BY order_placed_date";
   if (!$sql) die('Invalid query: ' . mysql_error());

$result = mysql_query($sql);

$data = array();

while($row = mysql_fetch_array($result))
{
  $data[] = intval($row['order_total']);
}

/*
 *  Create a title object and set the text to present month.
 */
$title = new title( 'Monthly Sales Statistics for ' . date("F Y") . ' (US Dollar)' );
$title->set_style( "{font-size: 18px; font-family: Calibri; color: #808000; text-align: center;}" );

//Make our Bar Chart
$bar = new bar_filled('#f99bd6', '#ee0099');
$bar->set_values($data);

//Create a new Chart object
$chart = new open_flash_chart();

// add the title to the chart:
$chart->set_title( $title );
$chart->set_bg_colour("#FFFFFF");

// Display the bar object on the chart
$chart->add_element($bar);

/*
*  Create a Y Axis object
*/
$y_axis = new y_axis();
$y_axis->set_range(0, 12000, 1000);

// Add the y-axis object to the chart
$chart->add_y_axis($y_axis);

echo $chart->toPrettyString();
?>

---

现在上面的代码显示正常，这是快照：
http://static.zooomr.com/images/7749303_49fd833a44_o.jpg

我想要什么是在 X 轴上显示日期，从我的 MySQL 数据库获取日期值。

以下是日期在我的数据库（日期时间类型）中的存储方式：

2008-12-30 00:06:24
2009-02-03 01:57:17
2009-02-03 01:58:27
2009-05-03 01:58:48
2009-06-03 02:00:31
2009-07-03 02:01:47
2009-07-03 02:02:31
2009-07-04 14:21:18
2009-07-04 14:21:36
2009-07-04 14:22:18
2009-07-04 14:23:29
2009-07-04 14:24:24

我尝试使用以下代码在 X 轴上显示日期：

---

<?php

include_once 'php-ofc-library/open-flash-chart.php';

//Connect to MySQL Database
$con = mysql_connect("localhost", "root", "password");
    if (!$con) die('Could not connect : ' . mysql_error());
$db_selected = mysql_select_db("cart",$con);
    if (!db_selected) die ("Could not find the database: " . mysql_error());

$sql = "SELECT * from orders ORDER BY order_placed_date";
    if (!$sql) die('Invalid query: ' . mysql_error());

$result = mysql_query($sql);

$amountData = array();


while($row = mysql_fetch_array($result))
{
  $amountData[] = intval($row['order_total']); 
}

$chart = new open_flash_chart();
$chart->set_title(new title('Open Flash Chart Downloads'));

//Make Bar Chart
$bar = new bar_filled('#df95c3', '#f34db7');
$bar->set_values($amountData);

//Create a new Chart object
$chart = new open_flash_chart();

/*
 *  Create a title object and set the text to present month.
 */
$title = new title( 'Monthly Sales Statistics for ' . date("F Y") . ' (US Dollar)' );
$title->set_style( "{font-size: 18px; font-family: Calibri; color: #808000; text-align: center;}" );

// add the title to the chart:
$chart->set_title( $title );
$chart->set_bg_colour("#FFFFFF");


// Add the bar object to the chart
$chart->add_element($bar);


//
// create an X Axis object
//
$x_axis = new x_axis();
// grid line and tick every 10
$x_axis->set_range(
    mktime(0, 0, 0, 1, 1, date('Y')),    // <-- min == 1st Jan, this year
    mktime(0, 0, 0, 1, 31, date('Y'))    // <-- max == 31st Jan, this year
    );
// show ticks and grid lines for every day:
$x_axis->set_steps(86400);

$labels = new x_axis_labels();
// tell the labels to render the number as a date:
$labels->text('#date:d#');
// generate labels for every day
$labels->set_steps(86400);
// only display every other label (every other day)
$labels->visible_steps(1);


// finally attach the label definition to the x axis
$x_axis->set_labels($labels);


$y_axis = new y_axis();
$y_axis->set_range(0, 3000, 200);

// Display the Axis on the Chart
$chart->set_x_axis($x_axis);
$chart->add_y_axis($y_axis);

echo $chart->toPrettyString();


?>

---

这是我得到的：
http://static.zooomr.com/images/7749325_1c8b37fdf9_o.jpg

金额为已显示，但全部在 0 x 轴处排成一行。

我该如何解决这个问题，所以从数据库中获取订单日期，然后根据下订单的日期将它们显示在图表上。

=================================================== ==========

下面是订单总计及其下达日期的 JSON 数据。

---

<?php

include_once 'php-ofc-library/open-flash-chart.php';

//Connect to MySQL Database
$con = mysql_connect("localhost", "root", "password");
    if (!$con) die('Could not connect : ' . mysql_error());
$db_selected = mysql_select_db("cart",$con);
    if (!db_selected) die ("Could not find the database: " . mysql_error());

$sql = "SELECT * from orders ORDER BY order_placed_date";
    if (!$sql) die('Invalid query: ' . mysql_error());

$result = mysql_query($sql);

$dateData = array();
$TotalAmountData = array();

while($row = mysql_fetch_array($result))
{
  $TotalAmountData [] = intval($row['order_total']);
  $dateData[] = $row['order_placed_date'];

}

print '<pre>';
print_r( $TotalAmountData );
print_r( $dateData );
print '</pre>';[/code]

?>

---

这显示了以下 JSON 数据：

Array  // This is the Total Order Amount Per Day
(
    [0] => 2499
    [1] => 199
    [2] => 449
    [3] => 299
    [4] => 359
    [5] => 279
    [6] => 1359
    [7] => 5099
    [8] => 2621
    [9] => 2169
    [10] => 2249
    [11] => 5509
)
Array // This is the DateTime on which the orders where placed
(
    [0] => 2008-12-30 00:06:24
    [1] => 2009-02-03 01:57:17
    [2] => 2009-02-03 01:58:27
    [3] => 2009-05-03 01:58:48
    [4] => 2009-06-03 02:00:31
    [5] => 2009-07-03 02:01:47
    [6] => 2009-07-03 02:02:31
    [7] => 2009-07-04 14:21:18
    [8] => 2009-07-04 14:21:36
    [9] => 2009-07-04 14:22:18
    [10] => 2009-07-04 14:23:29
    [11] => 2009-07-04 14:24:24
)

我尝试通过从日期中删除时间来选择日期：

SELECT DATE_FORMAT(order_placed_date, '%m-%d-%Y'), order_total FROM orders

但上面的代码显示 JSON 数据

更新的空值： 有人可以帮忙吗？

Answer 1

您的数值真的是每天的总计吗？ 看起来是每个订单的总数，以及订单日期。

第一个图表的问题在于，您没有将每天的值存储到总计中 - Open Flash Chart 不会为您执行此操作。 您可以将其作为 SQL 查询的一部分（例如使用 DATE() 将日期时间转换为日期），或者使用 PHP 解析和重新格式化日期，并将同一天的值相加。 请注意，根据您处理 x 轴的方式，您可能还需要在没有任何订单的日子里添加 0 个条目。

第二张图的问题是您每秒设置一个元素，但您的数据应该是每天。 这里重要的是理解折线图和散点图之间的区别Open Flash Chart 中的图表。 折线图使用一维数据点数组绘制，而散点图则使用坐标绘制。