<?php error_reporting(E_ALL^E_NOTICE^E_WARNING^E_DEPRECATED); //获取真实IP function get_ip() { 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; } //获取UA function get_ua(){ $ua = $_SERVER['HTTP_USER_AGENT']; return $ua; } //创建token function token($user,$pass){ //token生成算法为:用户名 + md5后的密码 + ip + ua $token = $user.$pass.get_ua(); $token = md5($token); return $token; } //判断用户是否登录 function is_login($user,$pass){ $token = $user.$pass.get_ua(); $token = md5($token); $username = $_COOKIE['user']; $password = $_COOKIE['token']; //进行判断 if(($user != $username) || ($password != $token)){ echo '权限不足!'; exit; } else{ return true; } } //判断文件MIME类型 function mime($path){ $mime = mime_content_type($path); switch ( $mime ) { case 'image/gif': case 'image/png': case 'image/jpeg': case 'image/bmp': case 'image/x-ms-bmp': case 'image/webp': case 'image/svg+xml': return TRUE; break; default: return FALSE; break; } } //根据MIME类型返回文件后缀 function ext($path){ $mime = mime_content_type($path); switch ( $mime ) { case 'image/gif': return '.gif'; break; case 'image/png': return '.png'; break; case 'image/jpeg': return '.jpg'; break; case 'image/x-ms-bmp': return '.bmp'; break; case 'image/webp': return '.webp'; break; default: return FALSE; break; } } //获取文件大小 function file_size($path){ //先判断文件是否存在 if(!is_file($path)){ $name = '0 byte'; } else{ //继续执行 $size = filesize($path); //转换为KB $size = $size / 1024; $size = round($size,1); $name = $size.' KB'; //转换为Mb if($size >= 1024){ $size = $size / 1024; $size = round($size,1); $name = $size.' MB'; } } return $name; } //缩略图函数 function thumbnail($img){ //返回路径 $dir = dirname($img['path']); $thumbnail_name = $dir.'/'.$img['imgid'].'_thumb'.$img['ext']; //缩略图完整地址 $fullpath = FCPATH.$thumbnail_name; //echo $fullpath; //判断缩略图是否存在 if(is_file($fullpath)){ return $thumbnail_name; } //$thumbnail_name = $dir.$name.'_thumb'; //返回缩略图地址,不带文件名 //返回原图 else{ return $img['path']; } } //生成4位随机数,方法来自:https://blog.csdn.net/happy_jijiawei/article/details/50581094 function GetRandStr($len) { $chars = array( "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" ); $charsLen = count($chars) - 1; shuffle($chars); $output = ""; for ($i=0; $i<$len; $i++) { $output .= $chars[mt_rand(0, $charsLen)]; } return $output; } ?>