我用php写的几个页面读取出来的cookie为什么会只读取各自页面的cookie而不是读取全部的cookie？
我贴出程序，请帮忙看看谢谢！

页面一：
if($SearchComKey!="")
{
$SearchComKey2="c".$supersearchkey;
}
if($supersearchkey!="")
{
$SearchComKey2="c".$supersearchkey;
}
if(empty($_COOKIE["SearchKey"]))
{
setcookie("SearchKey", $SearchComKey2, time()+3600);//3600秒=1小时
}
else
{
$String = $_COOKIE["SearchKey"].",".$SearchComKey2;
$key=in_array($SearchComKey2, explode(",",$_COOKIE["SearchKey"]));
if($key<>"1")
{
setcookie("SearchKey",$String, time()+3600);//3600秒=1小时
}
}
$ListCooke = explode(",",$_COOKIE["SearchKey"]);



页面二：
if($SearchComKey!="")
{
$SearchComKey2="p".$supersearchkey;
}
if($supersearchkey!="")
{
$SearchComKey2="p".$supersearchkey;
}
if(empty($_COOKIE["SearchKey"]))
{
setcookie("SearchKey", $SearchComKey2, time()+3600);//3600秒=1小时
}
else
{
$String = $_COOKIE["SearchKey"].",".$SearchComKey2;
$key=in_array($SearchComKey2, explode(",",$_COOKIE["SearchKey"]));
if($key<>"1")
{
setcookie("SearchKey",$String, time()+3600);//3600秒=1小时
}
}
$ListCooke = explode(",",$_COOKIE["SearchKey"]);