php setcookie详解用法
cookie 常用于识别用户,cookie 是服务器留在用户计算机中的小文件,每当相同的计算机通过浏览器请求页面时,它同时会发送 cookie,通过 php,您能够创建并取回 cookie 的值.
如何创建 cookie？
setcookie() 函数用于设置 cookie.
注释:setcookie() 函数必须位于 <html> 标签之前.
语法:setcookie(name,value,expire,path,domain);例子.
在下面的例子中,我们将创建名为 "user" 的 cookie,把为它赋值 "alex porter",我们也规定了此 cookie 在一小时后过期.
最简单的cookie创建方法:
<?php
echo( "cookie created? : " . setcookie("cookie_name", "cookie_data" ) );
实例二:cookies存数组
<?
setcookie("php[uid]", "1111111111111111", time()+3600);
setcookie("php[color]", "black", time()+3600);
setcookie("php[preference]", "english", time()+3600);
if (isset ($php)) {
while (list ($name, $value) = each ($php)) {
echo "$name = $value<br>n";
}
}
cookie删除:
<?php
setcookie ( "cookie_user", "test", time () + 60 * 60 * 24 * 30 );
setcookie ( "cookie_pass", md5 ( "test" ), time () + 60 * 60 * 24 * 30 );
function logout() {
setcookie ( "cookie_user", "", time () + 60 * 60 * 24 * 30 );
setcookie ( "cookie_pass", "", time () + 60 * 60 * 24 * 30 );
}
logout ();
echo $_cookie ['cookie_user'] . "<br />";
echo "you have successfully logged out.";
下面一个利用cookies记录用户名自动登录函数实例:
<?php
$globals['username'] = "test";
$globals['password'] = "test";
function validatelogin ($username, $password){
if (strcmp ($username, $globals['username']) == 0 && strcmp ($password, $globals['password']) == 0){
setcookie ("cookie_user", $username, time()+60*60*24*30);
setcookie ("cookie_pass", md5 ($password), time()+60*60*24*30);
return true;
} else {
return false;
}
}
if (validatelogin ("test","test")){
echo "successfully logged in.";
} else {
echo "sorry, invalid login.";
}
永久地址：http://www.phprm.com/huihua/fs3045.html
转载随意~请带上教程地址吧^^