The products visited by the user are recorded in PHP, the product ID is recorded in the cookie, and the product information is obtained by ID.

1. Test method www.xxx.com/test.php?c

Copy code The code is as follows:

$content_id = array(); //1. Create an array
$content_id[] = $ _GET['contentid']; //2. Insert the received ID into the array
if(isset($_COOKIE['content_id'])) //3. Determine whether the cookie exists. It does not exist for the first time (if If exists)
{
$now_content = str_replace("\", "", $_COOKIE['content_id']);//(4). You can check the cookie. If there is a problem with unserialize, I will The slashes inside are removed
$now = unserialize($now_content); //(5).De-instantiate the string generated by serialize in the cookie into an array
foreach($now as $n=>$w) { //(6). There are many elements in it, so I need to foreach the value
if(!in_array($w,$content_id)) //(7). Determine whether this value exists. If it exists, I will not insert it into it. into the array;
{
$content_id[] = $w; //(8). Insert into the array
}
}
$c //(9). Instantiate the array into a string
setcookie("content_id", $content, time()+3600*24); //(10). Insert into cookie
}else {
$c//4. Instantiate the array into a string
setcookie("content_id",$content, time( )+3600*24); //5. Generate cookie
}
$getcontent = unserialize(str_replace("\", "", $_COOKIE['content_id']));
/*foreach($getcontent as $row =>$r)
{
echo $r;//(value)
}*/

The above introduces how to record the products visited by users in PHP, record the product ID in the cookie, and obtain the product information by ID, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.