PHP and JS operation Cookie Save Array method

How do you store a two-dimensional array in a cookie?
First, convert the array into a string, and then remove the slash (why is there a slash?). ) Convert back
a.php

b.php

JS Create cookie

var name = "Str1"; varfunction Setcookie (Name,value)//two parameters, one is the name of the cookie, one is the value {    var days = 30;//This cookie will be saved for 30 day 
  
   varexp  = Newdate ();    Newdate ("December, 9998");   Exp.settime (Exp.gettime () + days*24*60*60*1000);   Document.cookie = name + "=" + Escape (value) + "; expires=" +exp.togmtstring ();} Functiongetcookie (name)//Take the cookie function       {    var arr =document.cookie.match (New RegExp ("(^|)") +name+ "= ([^;] *)(;|$)"));    if (arr! = null) return (arr[2]); return null;} function Delcookie (name)//delete cookie{    var exp =new Date ();   Exp.settime (Exp.gettime ()-1);    Varcval=getcookie (name);   if (cval!=null) document.cookie= name + "=" +cval+ "; expires=" +exp.togmtstring ();} Setcookie ("Xiaoqi", "3")
  

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