大神 急

Jun 13, 2016 pm 12:58 PM
array gt id nbsp

大神求助 急...
两个二维数组  
  $cart = arrray(array("id"=1,"num="2"));(session中的array值)

  第一次传  $newcart = arrray(array("id"=1,"num="4");array("id"=2,"num="4"))

  第二次传  $newcart = arrray(array("id"=9,"num="4");array("id"=1,"num="5"))
  
  第三次传  id 是随时变的.... 
  。。。。。


怎么样遍历 使它变成   $cart  = arrray(
                                      [0]=>array("id"=>1,"num"=>10)
                                      [1]=>array("id"=>2,"num"=>4)
                                      [2]=>array("id"=>9,"num"=>5)
                                     )

 怎么就实现   大神求助啊
------解决方案--------------------
没看懂,id为9 的num怎么变成5了。id=1 的也不知道怎么来的。
------解决方案--------------------

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

<br />

$cart    = array(1=>array("id"=>1,"num"=>2),2=>array("id"=>2,"num"=>5));<br />

$newcart = array(1=>array("id"=>1,"num"=>4),3=>array("id"=>3,"num"=>4));<br />

foreach( $newcart as $k=>$v ){<br />

<br />

   if( $cart[$v['id']] ){<br />

         <br />

       $cart[$v['id']]['num'] += $v['num']; <br />

     <br />

   }<br />

   else{<br />

      <br />

      $cart = array_merge($cart,array($v));<br />

     <br />

   }<br />

<br />

}<br />

Copy after login


做购物车最好是用 id作为数组的key,这样对于添加修改删除操作都狠方便。

符号要注意一下 数组指向值是"=>" ,不是"="。
------解决方案--------------------

1

2

3

4

5

6

7

8

9

10

$cart = array(array("id"=>1,"num"=>2));<br />

 <br />

 $newcart = array(array("id"=>1,"num"=>4),array("id"=>2,"num"=>4));<br />

 foreach($cart as $v) $t[$v['id']]+=$v['num'];<br />

  <br />

 foreach($newcart as &$v){<br />

         $v['num']+=$t[$v['id']];<br />

 }<br />

$cart =$newcart; <br />

print_r($cart);

Copy after login
 

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot Article

Hot tools Tags

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Solution: Your organization requires you to change your PIN Solution: Your organization requires you to change your PIN Oct 04, 2023 pm 05:45 PM

Solution: Your organization requires you to change your PIN

How to adjust window border settings on Windows 11: Change color and size How to adjust window border settings on Windows 11: Change color and size Sep 22, 2023 am 11:37 AM

How to adjust window border settings on Windows 11: Change color and size

Fix event ID 55, 50, 98, 140 disk error in event viewer Fix event ID 55, 50, 98, 140 disk error in event viewer Mar 19, 2024 am 09:43 AM

Fix event ID 55, 50, 98, 140 disk error in event viewer

This Apple ID is not yet in use in the iTunes Store: Fix This Apple ID is not yet in use in the iTunes Store: Fix Jun 10, 2024 pm 05:42 PM

This Apple ID is not yet in use in the iTunes Store: Fix

How to enable or disable taskbar thumbnail previews on Windows 11 How to enable or disable taskbar thumbnail previews on Windows 11 Sep 15, 2023 pm 03:57 PM

How to enable or disable taskbar thumbnail previews on Windows 11

How to change title bar color on Windows 11? How to change title bar color on Windows 11? Sep 14, 2023 pm 03:33 PM

How to change title bar color on Windows 11?

OOBELANGUAGE Error Problems in Windows 11/10 Repair OOBELANGUAGE Error Problems in Windows 11/10 Repair Jul 16, 2023 pm 03:29 PM

OOBELANGUAGE Error Problems in Windows 11/10 Repair

What are the differences between Huawei GT3 Pro and GT4? What are the differences between Huawei GT3 Pro and GT4? Dec 29, 2023 pm 02:27 PM

What are the differences between Huawei GT3 Pro and GT4?

See all articles