php array_merge不适用于cookie id

Question

i have a problem with php merge_array, i am writing a cookie that gets element id from a button in an html form, then i make a cookie setcookie("info", $_REQUEST["ELEMENT_ID"]+1, time()+3600). I want to write an array that merges $array1 with ellement id from form and $array2 that gets the cookie elements. Problem when i click on the buy button on my page i always have 2 elements on the array, the new element and one from the cookies array. Array ( [0] => [1] => Array ( [info] => 16 Am looking to get array $result with more than just 2 elements, so that i can use the id to get name, photo and other properties into the shooping cart

<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>
<?
$array1=array($_REQUEST["ELEMENT_ID"]);

if(!isset($_COOKIE["info"])){
    setcookie("info", $_REQUEST["ELEMENT_ID"]+1, time()+3600);
    $w = $_REQUEST["ELEMENT_ID"]+1;
    print_r($_COOKIE);
}
echo"<br/>";
$array2=array($_COOKIE);
$result= array_merge($array1, $array2);
print_r($result);

?>

Answer 1

EDIT:

Ok now that I better understand what you want to do here's what I suggest. Since you want to store historical data in the cookie and you want to maintain this in an array, you would store the data as a serialized array of ids in the cookie. What you do now is get the current ELEMENT_ID, add one to it, and store that value into the cookie which will overwrite what's there already. So I would replace all of your code with this:

<?php
    // do your checks
    if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true) die();

    // 1: if cookie exists, grab the data out of it
    $historical_element_ids = array(); // initialize the variable as an array
    if(isset($_COOKIE['info'])){
        // retrieve the previous element ids as an array
        $historical_element_ids = unserialize($_COOKIE['info']);
    }

    // 2: add the new id to the list of ids (only if the id doesn't already exist)
    // the cookie will remain unchanged if the item already exists in the array of ids
    if(!in_array($_REQUEST['ELEMENT_ID'], $historical_element_ids)){
        $historical_element_ids[] = $_REQUEST['ELEMENT_ID']; // adds this to the end of the array

        // 3: set the cookie with the new serialized array of ids
        setcookie("info", serialize($historical_element_ids), time()+3600);
    }

    // display the cookie (should see a serialized array of ids)
    print_r($_COOKIE);
    echo"<br/>";

    // accessing the cookie's values
    $result = unserialize($_COOKIE['info']);
    print_r($result);
?>