<?php //获取访客IP function getIP() { if (getenv('HTTP_CLIENT_IP')) { $ip = getenv('HTTP_CLIENT_IP'); } elseif (getenv('HTTP_X_FORWARDED_FOR')) { $ip = getenv('HTTP_X_FORWARDED_FOR'); } elseif (getenv('HTTP_X_FORWARDED')) { $ip = getenv('HTTP_X_FORWARDED'); } elseif (getenv('HTTP_FORWARDED_FOR')) { $ip = getenv('HTTP_FORWARDED_FOR'); } elseif (getenv('HTTP_FORWARDED')) { $ip = getenv('HTTP_FORWARDED'); } else { $ip = $_SERVER['REMOTE_ADDR']; } return $ip; } function is_login(){ $key = md5(USER.PASSWORD.'onenav'.$_SERVER['HTTP_USER_AGENT']); //获取session $session = $_COOKIE['key']; //如果已经成功登录 if($session === $key) { return true; } else{ return false; } } //后续全局函数全部以g_命名开头 function g_extend_js() { //载入js扩展 if( file_exists('data/extend.js') ) { echo '<script src = "data/extend.js"></script>'; } else{ echo ''; } }