利用cookie实现用户自动登录的代码
cookie 是由服务器发送到浏览器的变量,cookie 通常是服务器嵌入到用户计算机中的小文本文件,每当计算机通过浏览器请求一个页面,就会发送这个 cookie,实例代码如下:
<?php echo ( "Cookie created? : " . setcookie( "cookie_name" , "cookie_data" ) ); ?> <html> <head> <title>Cookie</title> </head> <body> </body> </html>如果要删除 cookie只要设置cookie的过期时间就行了,实例代码如下:
<?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." ; ?>我们在开发中经常会用到cookie自动登录,实例代码如下:
<?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." ; } ?>查看更多关于利用cookie实现用户自动登录的代码 - php会话的详细内容...
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