PHP中Cookie的使用详解(简单易懂)

<?php
//添加cookie
setcookie("name","zxf",time()+3600);
//数组

/$arr = array(1,2,3); 
 $arr_str = serialize($arr); 
 setcookie("a",$arr_str,time()+3600); 

//获取cookie
 
var_dump($_COOKIE);

//更新cookie

setcookie("name","aaa",time()+3600);

//删除cookie

setcookie("name","",time()-20);

//删除所有

foreach ($_COOKIE as $key => $value) {
 setcookie($key,"",time()-1);
 }
echo "成功";
 ?>

<?php

//先判断cookie里是否有上次的登录信息

if(!empty($_COOKIE[‘lastVisit'])){

  echo “你上次登陆的时间是”.$_COOKIE[‘lastViat'];

//更新时间

setcookie(“lastVisit”,”data(Y-m-d H:i:s)”, time()+3600);

}else{

//说明用户是第一次登陆

echo”第一次登陆”;

//更新时间

setcookie(“lastViait”,”data(“Y-m-d H:i:s”)”, time()+3600);

}
?>

//获取用户是否选中了保存id

if(!empty($_POST[‘cookie'])){

  setcookie(“id”,$id,time()-100);

}else{

  if(!empty($_COOKIE[‘id'])){

   setcookie(“id”,$id,time()-10);

}
}