如何使用PHP对从MySQL数据库中提取的记录进行排序？

Question

我正在为我的网站编写高级搜索代码。我想根据4个参数 - 客户名称，公司名称，订单数量和总订单价值对从MySQL数据库中提取的记录进行排序。搜索工作非常好，并且还根据客户名称和公司名称对值进行排序。但问题是我无法根据订单数量和总订单价值对行进行排序。

首先看看我的任务界面 -

我使用4个表来完成这个搜索引擎的排序。以下是表格：

1. address_book table：



1. 客户表：



1. 订单表：



1. orders_products表：



这是我的PHP代码，用于搜索和排序：

<?php
require_once 'includes/config.php';
?>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js"></script>
<link rel="stylesheet" type="text/css"
      href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/themes/ui-lightness/jquery-ui.css">
<script type="text/javascript">
    $(document).ready(function () {
        //$("#datepicker").datepicker();
        $("#txtstartdate").datepicker({
            dateFormat: "yy-mm-dd",
        });
        $("#txtenddate").datepicker({
            dateFormat: "yy-mm-dd",
        });
    });
</script>
<div>
    <form name="frm1" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
        <table width="100%" border="0" align="center">
            <tr>
                <th>Start Date:</th>
                <td><input type="text" name="txtstartdate" id="txtstartdate"
                           value="<?php if (isset($_POST['btnsearch'])) {
                               echo $_POST['txtstartdate'];
                           }
                           else {
                               echo '';
                           } ?>"/></td>
            </tr>
            <tr>
                <th>End Date:</th>
                <td><input type="text" name="txtenddate" id="txtenddate"
                           value="<?php if (isset($_POST['btnsearch'])) {
                               echo $_POST['txtenddate'];
                           }
                           else {
                               echo '';
                           } ?>"/></td>
            </tr>
            <tr>
                <th>Customer Name:</th>
                <td><input type="text" name="txtcustomername" id="txtcustomername"
                           value="<?php if (isset($_POST['btnsearch'])) {
                               echo $_POST['txtcustomername'];
                           }
                           else {
                               echo '';
                           } ?>"/></td>
            </tr>
            <tr>
                <th>Company Name:</th>
                <td><input type="text" name="txtcompanyname" id="txtcompanyname"
                           value="<?php if (isset($_POST['btnsearch'])) {
                               echo $_POST['txtcompanyname'];
                           }
                           else {
                               echo '';
                           } ?>"/></td>
            </tr>
            <tr>
                <th>Sorting:</th>
                <td><select name="selsorting" id="selsorting">
                        <option
                            value='customer_name' <?php if (isset($_POST['btnsearch']) && $_POST['selsorting'] == 'customer_name') {
                            echo "selected='selected'";
                        } ?>>
                            Customer Name
                        </option>
                        <option
                            value="company_name" <?php if (isset($_POST['btnsearch']) && $_POST['selsorting'] == 'company_name') {
                            echo "selected='selected'";
                        } ?>>
                            Company Name
                        </option>
                        <option
                            value="order_quantity" <?php if (isset($_POST['btnsearch']) && $_POST['selsorting'] == 'order_quantity') {
                            echo "selected='selected'";
                        } ?>>
                            Order Quantity
                        </option>
                        <option
                            value="total_order_value" <?php if (isset($_POST['btnsearch']) && $_POST['selsorting'] == 'total_order_value') {
                            echo "selected='selected'";
                        } ?>>
                            Total Order Value
                        </option>
                    </select></td>
            </tr>
            <tr>
                <td>&nbsp;</td>
                <td><input type="submit" name="btnsearch" value="Search"/>
            </tr>
        </table>
    </form>
</div>
<?php
if (isset($_POST['btnsearch'])) {
    $where = array();

    if (isset($_POST['txtstartdate']) && !empty($_POST['txtstartdate'])) {
        $startdate = $_POST['txtstartdate'];
        $where[]   = " orders.date_purchased >= '$startdate' ";
    }
    if (isset($_POST['txtenddate']) && !empty($_POST['txtenddate'])) {
        $enddate = $_POST['txtenddate'];
        $where[] = " orders.date_purchased <= '$enddate' ";
    }
    if (isset($_POST['txtcustomername']) && !empty($_POST['txtcustomername'])) {
        $customername = $_POST['txtcustomername'];
        $where[]      = " customers.customers_firstname LIKE '%$customername%' or customers.customers_lastname LIKE '%$customername%' ";
    }
    if (isset($_POST['txtcompanyname']) && !empty($_POST['txtcompanyname'])) {
        $companyname = $_POST['txtcompanyname'];
        $where[]     = " address_book.entry_company LIKE '%$companyname%' ";
    }
    if (isset($_POST['selsorting'])) {
        $sorting = $_POST['selsorting'];
        $where[] = " 1 = 1 GROUP BY customers.customers_id ORDER BY $sorting ";
    }

    if (count($where) > 0) {
        $query['where'] = " WHERE " . implode(" AND ", $where);
    }

    $sql = "SELECT customers.customers_id, CONCAT(customers.customers_firstname, ' ', customers.customers_lastname) AS `customer_name`, address_book.entry_company AS `company_name`, orders_products.final_price AS total_order_value
    FROM customers
    LEFT JOIN orders ON orders.customers_id = customers.customers_id
    LEFT JOIN address_book ON address_book.customers_id = customers.customers_id
    LEFT JOIN orders_products ON orders_products.orders_id = orders.orders_id " . $query['where'];

    $rs = mysql_query($sql);
    echo "<table width='100%' align='center' border='1' cellpadding='5' cellspacing='0'>";
    echo "<tr><th>Customer ID</th><th>Customer Name</th><th>Company Name</th><th>Order Quantity</th><th>Order Total</th></tr>";
    while ($row = mysql_fetch_array($rs)) {
        $sql2 = "SELECT COUNT(*) AS 'quantity' FROM `orders` WHERE `customers_id` = " . $row['customers_id'];
        $rs2  = mysql_query($sql2);
        while ($row2 = mysql_fetch_array($rs2)) {
            $sql3 = "SELECT SUM(`final_price`) AS 'total_order_value' FROM `orders_products` WHERE `orders_id` IN (SELECT `orders_id` FROM `orders` WHERE `customers_id` = " . $row['customers_id'] . ")";
            $rs3  = mysql_query($sql3);
            while ($row3 = mysql_fetch_array($rs3)) {
                echo "<tr><td>&nbsp;" . $row['customers_id'] . "</td>";
                echo "<td>&nbsp;" . $row['customer_name'] . "</td>";
                echo "<td>&nbsp;" . $row['company_name'] . "</td>";
                echo "<td>&nbsp;" . $row2['quantity'] . "</td>";
                echo "<td>&nbsp;" . $row3['total_order_value'] . "</td></tr>";
            }
        }
    }
    echo "</table>";
}
?>

我不了解如何对订单数量和总订单价值进行排序，因为它们不在主左连接查询中，并且它们是即时生成的。如果我使用聚合函数COUNT和SUM来计算主左连接查询中的订单数量和总订单价值，那么结果就不准确。但是，如果我在内部查询中计算这些，那么我不明白如何根据这两个参数进行排序。

安迪的帮助将不胜感激。

提前致谢。

Answer 1

您应该使用array_multisort（）数组函数对多维数组进行排序。