English 中文(简体)
php总和
原标题:php sum variable in while loop

我必须“假设”变数的数值,而这里我的例子就是:

while($row = mysql_fetch_array($result)){
  $price= $row[ price ] * $row[ order_q ];
}

如果我把<代码>echo price;例如:

19 15 20 13 10

我想像以下一些东西:sum(price)>.array_sum(price),以计及整个期间的所有结果。 因此,我想计算一下:19+15 +13+10 = 77

我怎么能与营地打交道?

成就

最佳回答

• 简单地在你行程之外推出一个变量,例如:

$total_price = 0;

and increment this number inside your loop:

$total_price += $row[ price ] * $row[ order_q ];
问题回答

e.g.

$total = 0;
while($row = mysql_fetch_array($result)){
  $price= $row[ price ] * $row[ order_q ];
  $total += $price;
}
echo  total:  , $total;

或者,如果你想要从问询中找到,你可以“在” s问中做。

SELECT Sum(price*order_q) as total FROM ...




相关问题
Brute-force/DoS prevention in PHP [closed]

I am trying to write a script to prevent brute-force login attempts in a website I m building. The logic goes something like this: User sends login information. Check if username and password is ...

please can anyone check this while loop and if condition

<?php $con=mysql_connect("localhost","mts","mts"); if(!con) { die( unable to connect . mysql_error()); } mysql_select_db("mts",$con); /* date_default_timezone_set ("Asia/Calcutta"); $date = ...

定值美元

如何确认来自正确来源的数字。

Generating a drop down list of timezones with PHP

Most sites need some way to show the dates on the site in the users preferred timezone. Below are two lists that I found and then one method using the built in PHP DateTime class in PHP 5. I need ...

Text as watermarking in PHP

I want to create text as a watermark for an image. the water mark should have the following properties front: Impact color: white opacity: 31% Font style: regular, bold Bevel and Emboss size: 30 ...

How does php cast boolean variables?

How does php cast boolean variables? I was trying to save a boolean value to an array: $result["Users"]["is_login"] = true; but when I use debug the is_login value is blank. and when I do ...

热门标签