在 PHP cookie 中存储和检索数组

编程入门行业动态更新时间:2024-10-11 17:23:00

本文介绍了在 PHP cookie 中存储和检索数组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我想从一些虚拟"索引卡中存储一些数据.每张卡片都有正面和背面，用户可以存放多张卡片.每一方都会有数据.

I ----------------- I I CARD 1 FRONT I -----------------II --------------- I I CARD 1 BACK I -----------------II ----------------- I I CARD 2 FRONT I -----------------II --------------- I I CARD 2 BACK I -----------------I

好吧，我的图表有点乱.但是你会收到消息.:)

从上图中想象一下.我想将每张卡片的数据(正面和背面)存储在 cookie 中，作为一个数组(也许)，然后能够将每个值拉回并在适用的地方(在不同的页面上)插入.

同时请记住，用户可以制作任意数量的卡片.我不能使用 POST 或 GET 函数.数组位是有争议的，如果您能想到一种更简单的方法将这些数据存储在 cookie 中，请告诉我.请注意:不建议存储在数据库中，因为它对项目不方便.:)

解决方案

使用 json_encode/json_decode 来获取/设置 cookie 中的数组.

测试数组

$cardArray=array('CARD 1'=>array('FRONT I', 'BACK I'),'卡 2'=> 数组('前 2'，'后 2'));

转换并写入cookie

$json = json_encode($cardArray);setcookie('cards', $json);

保存的字符串看起来像这样

{"CARD 1":["FRONT I","BACK I"],"CARD 2":["FRONT 2","BACK 2"]}

取回饼干

$cookie = $_COOKIE['cards'];$cookie = stripslashes($cookie);$savedCardArray = json_decode($cookie, true);

显示恢复后的数组

echo '

';打印_r($savedCardArray);echo '</pre>';

输出

数组([卡片 1] =>大批([0] =>前我[1] =>返回我)[卡片 2] =>大批([0] =>前 2[1] =>返回 2))

编辑如果你对stripslashes感到疑惑，那是因为实际保存的字符串是

{\"CARD 1\":[\"FRONT I\",\"BACK I\"],\"CARD 2\":[\"FRONT 2\",\"BACK 2\"]}

setcookie 在引号前添加 \ 来转义它们.如果你不摆脱这些，json_decode 将会失败.

编辑二

向 cookie 添加一张新卡片

如上加载数组

$savedCardArray['CARD XX']=array('FRONT XX', 'BACK XX');

如上保存数组，但现在当然是$savedCardArray 而不是$cardArray.

I'm looking to store some data from some 'virtual' index cards. Each card has a front and a back, and the user can store multiple cards. Each side will have data on it.

I ----------------- I I CARD 1 FRONT I I------------------I I --------------- I I CARD 1 BACK I I-----------------I I ----------------- I I CARD 2 FRONT I I------------------I I --------------- I I CARD 2 BACK I I-----------------I

OK, my diagrams got messed up a bit. But you get the message. :)

Imagine it from the diagrams above. I'd like to store each card's data (front and back) in a cookie, as an array (maybe), and then be able to pull each value back and insert it where applicable (on a different page).

At the same time, bear in mind that the user can make as many cards as they like. I can't use POST or GET functions. The array bit is debatable, if you can think of an easier way of storing this data in a cookie, let me know. Please note: don't suggest storing in a database, as it won't be convenient for the project. :)

解决方案

Use json_encode / json_decode to get / set arrays in cookies.

Test array

$cardArray=array( 'CARD 1'=>array('FRONT I', 'BACK I'), 'CARD 2'=>array('FRONT 2', 'BACK 2') );

convert and write the cookie

$json = json_encode($cardArray); setcookie('cards', $json);

the saved string looks like this

{"CARD 1":["FRONT I","BACK I"],"CARD 2":["FRONT 2","BACK 2"]}

get the cookie back

$cookie = $_COOKIE['cards']; $cookie = stripslashes($cookie); $savedCardArray = json_decode($cookie, true);

show the restored array

echo '<pre>'; print_r($savedCardArray); echo '</pre>';