Detailed explanation of how to read, write and interact with cookies using PHP+JavaScript

This article mainly introduces the reading, writing and interactive operation methods of PHP and JavaScript for cookies. It combines examples to analyze how php and javascript set cookies, php reads cookies set by php and js, and js reads php and js settings. For cookies and other related operating skills, friends in need can refer to the following

This article describes the reading, writing and interactive operation methods of PHP and JavaScript for cookies. Share it with everyone for your reference, the details are as follows:

The following examples list several interaction scenarios and list the methods of interaction between JS and PHP. To summarize, we will avoid being troubled by cookie issues in the future.

<?php
 setcookie(&#39;php_cn_ck&#39;,&#39;php_中文_cookie&#39;);
 setcookie(&#39;php_en_ck&#39;,&#39;php_english_cookie&#39;);
?>

<script src="cookie.js"></script>
<script>
 Cookies.set(&#39;js_cn_ck&#39;,&#39;js_中文_cookie&#39;,5000);
 Cookies.set(&#39;js_en_ck&#39;,&#39;js_english_cookie&#39;);
</script>

##PHP cookie has been set:
php_cn_ck=php_ Chinese_cookiephp_en_ck=php_english_cookie

JS cookie has been set:
js_cn_ck=js_中文_cookiejs_en_ck=js_english_cookie

Read cookie

Read the Chinese and English cookies sent by php

1 php read php settings php cookie

<?php
 include(&#39;function.php&#39;);
 $php_cn_ck=$_COOKIE[&#39;php_cn_ck&#39;];
 $un_php_cn_ck=unescape($php_cn_ck);
 echo "解码前的中文cookie:php_cn_ck=$php_cn_ck<br><br>";
 echo "解码后的中文cookie:un_php_cn_ck=$un_php_cn_ck<br><br>";
 $php_en_ck=$_COOKIE[&#39;php_en_ck&#39;];
 echo "英文cookie无需解码:php_en_ck=$php_en_ck<br><br>";
?>

2 js reads php settings cookie

<script src="cookie.js"></script>
<script>
 php_cn_ck=Cookies.get(&#39;php_cn_ck&#39;);
 un_php_cn_ck = decodeURIComponent (escape(php_cn_ck));
 document.write("解码前的中文cookie :php_cn_ck="+php_cn_ck+"<Br><br>");
 document.write("解码后的中文cookie :un_php_cn_ck="+un_php_cn_ck+"<Br><br>");
 php_en_ck=Cookies.get(&#39;php_en_ck&#39;);
 document.write("英文cookie无需解码 :php_en_ck="+php_en_ck+"<Br><br>");
</script>

2 Read the Chinese and English cookies sent by JS

1 PHP reads JS and sets the js cookie

<?php
 $js_cn_ck=$_COOKIE[&#39;js_cn_ck&#39;];
 $un_js_cn_ck=unescape($js_cn_ck);
 echo "解码前的中文cookie:js_cn_ck=$js_cn_ck<br><br>";
 echo "解码后的中文cookie:un_js_cn_ck=$un_js_cn_ck<br><br>";
 $js_en_ck=$_COOKIE[&#39;js_en_ck&#39;];
 echo "英文cookie无需解码:js_en_ck=$js_en_ck<br><br>";
?>

2 js reads the cookie set by js

<script>
 js_cn_ck=Cookies.get(&#39;js_cn_ck&#39;);
 document.write("解码前的中文cookie :js_cn_ck="+js_cn_ck+"<Br><br>");
 //un_js_cn_ck = decodeURIComponent (escape(js_cn_ck)); 调用这两句会出现js解析中断
 //document.write("解码后的中文cookie :un_js_cn_ck="+un_js_cn_ck+"<Br><br>");
 js_en_ck=Cookies.get(&#39;js_en_ck&#39;);
 document.write("英文cookie无需解码 :js_en_ck="+js_en_ck+"<Br><br>");
</script>

Summary:

2. js uses the cookie.js method to read js cookies without any obstacles and without decoding.
3.
JS needs to do "decodeURIComponent (escape(php_cn_ck))" to read the Chinese cookie of php.
4. php needs to do " unescape()" function processing

var Cookies = {};
/**
* 设置Cookies
*/
Cookies.set = function(name, value){
 var argv = arguments;
 var argc = arguments.length;
 var expires = (argc > 2) ? argv[2] : null;
 if(expires != null){
  var exp　　 = new Date();
  exp.setTime(exp.getTime() + 8*3600 + expires);
 }
 alert(exp.toGMTString());
 var path = (argc > 3) ? argv[3] : '/';
 var domain = (argc > 4) ? argv[4] : null;
  var secure = (argc > 5) ? argv[5] : false;
 document.cookie = name + "=" + escape (value) +
 ((expires == null) ? "" : ("; expires=" + exp.toGMTString())) +
 ((path == null) ? "" : ("; path=" + path)) +
 ((domain == null) ? "" : ("; domain=" + domain)) +
 ((secure == true) ? "; secure" : "");
};
/**
* 读取Cookies
*/
Cookies.get = function(name){
 var arg = name + "=";
 var alen = arg.length;
 var clen = document.cookie.length;
 var i = 0;
 var j = 0;
 while(i < clen){
  j = i + alen;
  if (document.cookie.substring(i, j) == arg)
  return Cookies.getCookieVal(j);
  i = document.cookie.indexOf(" ", i) + 1;
  if(i == 0)
  break;
 }
 return null;
};
/**
* 清除Cookies
*/
Cookies.clear = function(name) {
 if(Cookies.get(name)){
 var expdate = new Date();
 expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));
 Cookies.set(name, "", expdate);
 }
};
Cookies.getCookieVal = function(offset){
 var endstr = document.cookie.indexOf(";", offset);
 if(endstr == -1){
  endstr = document.cookie.length;
 }
 return unescape(document.cookie.substring(offset, endstr));
};

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Cookie Detailed explanation of plug-in js-cookie use case

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