问用php撤消jquery cookie

EN

<?php 
echo "initial values in the cart: <pre>";print_r($_COOKIE);echo "</pre>"; 
  $_COOKIE['cart']=null;
  setcookie("cart", "", time()-3600);  
 unset($_COOKIE['cart']); 
 unset($_COOKIE); 

 ?>
 <script>
 alert( "before delete         " +$.cookie("cart") ); 
 </script>  

   <script>
      $.cookie("cart")="";
      $.cookie('cart', null);
      $.cookie('cart',null,{path:'/');
     $.cookie("cart")=null;
     $.cookie('cart', '', { expires: -150 });
     jQuery.cookie("cart", '',{expires: -1,path:'/'});
     $.cookie("cart")=undefined;
     delete $.cookie("cart");
     $.cookie("cart","",); 
     $.removeCookie('cart', { path: '/' });  
     $.removeCookie("cart"); 
     alert( "just delete         " +$.cookie("cart") );
 </script> 
 <script>
 if($.cookie('cart') === null || $.cookie('cart') === "")
{ 
      alert( " cookie deleted 1         " +$.cookie("cart") );
}

else
{
     //have cookie
     alert( "have cookie         " +$.cookie("cart") );
} 

if (typeof $.cookie('cart') === 'undefined'){
 //no cookie
 alert( " cookie deleted 2        " +$.cookie("cart") );
}
 // if($.cookie('cart') === null || $.cookie('cart') === "" 
    // || $.(cookie('cart') === "null" || $.cookie('cart') === undefined))
// {
      // alert( " cart cookie deleted 3        " +$.cookie("cart") );
// }
</script>

  <script>
 alert( "after delete         " + $.cookie("cart") ); 
 </script>  
  <?php
  echo "Items after cookie in the cart is unset: <pre>";print_r($_COOKIE);echo "</pre>";  
  ?>