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php html表格查询_Php_Html_Loops_For Loop_Html Table - Fatal编程技术网

php html表格查询

php html表格查询,php,html,loops,for-loop,html-table,Php,Html,Loops,For Loop,Html Table,我已经做了很长一段时间了,只是想不通。我有一个html表,必须在$total/Sale Cost(最后一行)中找到值的总和。有人能帮我吗?或者给我指出正确的方向 代码如下: <?php print ("<table border=1><tr><th>Sale Number</th><th>Item</th><th>Item Cost</th><th>Units Sold</t

我已经做了很长一段时间了,只是想不通。我有一个html表,必须在$total/Sale Cost(最后一行)中找到值的总和。有人能帮我吗?或者给我指出正确的方向

代码如下:

<?php

print ("<table border=1><tr><th>Sale Number</th><th>Item</th><th>Item Cost</th><th>Units Sold</th><th>Sale Cost</th></tr>");

    for($x=0; $x<=20; $x=$x+1) {

        /*
        $sofa_total = 0;
        $table_total = 0;
        $chair_total = 0;
        $box_total = 0;
        $tablecloth_total = 0;
        */

        $amount = rand(1,10);
        $res = rand(1, 5);
        $object = 0;
        $total = $amount * $cost;




                if ($res == 1) {
                            $cost = 235.00;
                            $item = "sofa";
                            }
                        elseif ($res == 2) {
                            $cost = 125.00;
                            $item = "table";
                                }
                        elseif ($res == 3) {
                            $cost = 25.99;
                            $item = "chair";
                                }
                        elseif ($res == 4) {
                            $cost = 15.25;
                            $item = "box";
                                }
                        elseif ($res == 5) {
                            $cost = 23.50;
                            $item = "tablecloth";
                                }

        print ("<tr>");
             print ("<td>" . $table[$x][0] = $x+1 . "</td>");
             print ("<td>" . $table[$x][1] = $item . "</td>");
             print ("<td>" . $table[$x][2] = $cost . "</td>");
             print ("<td>" . $table[$x][3] = $amount . "</td>");
             print ("<td>" . $table[$x][4] = $total  . "</td>");
             }
        print ("</tr>");

                if ($object==0) {

                    $sofa_total = $sofa_total + $amount;

                    } elseif ($object==1) {

                    $table_total = $table_total + $amount;

                    } elseif ($object==2) {

                    $chair_total = $chair_total + $amount;

                    } elseif ($object==3) {

                    $box_total = $box_total + $amount;

                    } elseif ($object==4) {

                    $tablecloth_total = $tablecloth_total + $amount;

                    }


print ("</table>"); 

?>

将事物循环通过。。通过将当前实例的值添加到上一个

for( your loop){
    $sampleCost = $sampleCost + $currentCost;
}
echo $sampleCost; /*another way of displaying item*/
其理念是不断增加价值。确保你考虑数据,尤其是带小数的数据。
$currentCost; /* value from the query*/

让我猜猜。。。表中满是
1
s

打印
s时,应传入值,而不是espression。表达式被计算,在您的例子中,返回1,因为它们是成功的(它们是赋值)


不采用这种方法,您可以保留计数器并在每个周期将其相加,在另一个语句中打印当前值,最后在最后一个周期回显(打印)计数器。

当我尝试您的代码时,会出现两个错误:注意:未定义的变量:成本。。。第18行注意:未定义变量:sofa_总计。。。在第55行-也许可以尝试先修复这些?:)