有一个数组作为cookie值
[英]have an array as a cookie value
问题描述
I am having a PHP code problem. 
我有一个PHP代码问题。 As you see, I get an id from another page. 如您所见，我从另一个页面获得了一个id 。 I want to save these id 's in array based on cookies. 我想基于cookie将这些id保存在数组中。 I was able to do that, but I have a problem with it. 我能够做到这一点，但是我有一个问题。
When I set the timeout (for example to 20 seconds) and refresh page: every 20 second it works fine, but if I refresh it in under 20 seconds it gives me the error below. 当我设置超时时间（例如设置为20秒）并刷新页面时：每20秒可以正常工作，但是如果我在20秒以内刷新它，则会出现以下错误。
Fatal error: [] operator not supported for strings
I do not know why; 我不知道为什么; could you please help? 能否请你帮忙？
<?php $ID = is_numeric($_GET['ID']) ? $_GET['ID'] : 1; $cookie_name = "favoritepost"; if ( isset($_COOKIE[$cookie_name]) ) { $kookie = $_COOKIE[$cookie_name]; } else { $kookie = array(); } if ( ! in_array($ID, $kookie) ) { $kookie[] = $ID; } setcookie($cookie_name, serialize($kookie), time() + (20), "/"); // 86400 = 1 day ?> <html>
2 个解决方案
解决方案1
1 已采纳 2016-07-11 17:03:20
As per my last answer https://stackoverflow.com/a/38307347/2310830 根据我的最后答案https://stackoverflow.com/a/38307347/2310830
<?php
$ID = is_numeric($_GET['ID']) ? $_GET['ID'] : 1;
$cookie_name = "favoritepost";
if ( isset($_COOKIE[$cookie_name]) ) {
$kookie = unserialize($_COOKIE[$cookie_name]);
} else {
$kookie = array();
}
if ( ! in_array($ID, $kookie) ) {
$kookie[] = $ID;
}
setcookie($cookie_name, serialize($kookie), time() + (86400 * 30), "/"); // 86400 = 1 day
?>
<html>
解决方案2
0 2016-07-11 17:02:21
The array is serialized when it is stored as a cookie. 数组作为cookie存储时将被序列化。 So when you retrieve it, it is a string, not an array. 因此，当您检索它时，它是一个字符串，而不是数组。 You need to unserialize it before you add more to it: 您需要对它进行反序列化，然后再添加更多内容：
$kookie = unserialize($_COOKIE[$cookie_name]);
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