php基于tp5.1 实现短链接功能 (redis+nginx)
- 生成及存储短链接
// 生成短链接 function get_rand_str($len = 12) { if (!is_int($len) || $len < 0) { return false; } $char = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $string = ''; for ($i = $len; $i > 0; $i--) { $string .= $char[mt_rand(0, strlen($char) - 1)]; } return $string; } // 存储短链接对应的长链接 function set_cache($real_url, $expire = 3600) { $key = get_rand_str(6); // cache 为redis实例, 此处以tp5.1为例, 其他框架需更改为自己的用法 if (cache($key)) { return self::set_cache($real_url); } else { cache($key, $real_url, $expire); } return $key; }
2. 更改nginx配置, 将短链接重定向到处理文件
server{ .... #短链接(http(s)://xxx.com/s/xxx)重定向到 s文件夹下的share.php处理文件 location /s/ { rewrite ^(/s/)(.*)$ $1/share.php?k=$2; } }
share.php文件
<?php
/**
* @desc Class Share 分享处理类
* @author Ni
* @date 2020年10月19日10:26:41
*/
class Share
{
private static $instance;
private function __clone()
{
}
private $config = null;
private $redisConf = null;
private $redisHandle = null;
private $url = null;
//构造方法私有化，防止外部创建实例
private function __construct()
{
}
public static function getInstance()
{
//判断实例有无创建，没有的话创建实例并返回，有的话直接返回
if (!(self::$instance instanceof self)) {
self::$instance = new self();
}
return self::$instance;
}
private function init()
{
$this->getConfig();
$this->initRedisHandle();
}
/**
* @desc 获取配置
*/
private function getConfig()
{
// $this->config = include_once './config.php';
$this->config = [
'redis' => [
'host' => '127.0.0.1',
'port' => 6379,
// 全局缓存有效期（0为永久有效）
'expire' => 3600,
// 缓存前缀
'prefix' => '',
'password' => 'you_redis_password'
]
];
if (isset($this->config['redis'])) {
$this->redisConf = $this->config['redis'];
} else {
$this->return404();
}
}
private function return404()
{
$html = file_get_contents('./404.html');
echo $html;
exit;
}
private function initRedisHandle()
{
try {
if (!$this->redisHandle) {
$this->redisHandle = new Redis();
$this->redisHandle->connect($this->redisConf['host'], $this->redisConf['port'], $this->redisConf['expire']);
$this->redisHandle->auth($this->redisConf['password']);
} else {
return true;
}
} catch (Exception $e) {
$this->return404();
}
}
private function getUrl()
{
// 获取get参数k
$k = isset($_GET['k']) ? $_GET['k'] : '';
if (!$k) {
$this->return404();
}
// 获取缓存信息
$cache = $this->redisHandle->get($this->redisConf['prefix'] . $k);
if (!$cache) {
$this->return404();
}
$this->url = $cache;
}
private function redirectUrl()
{
if ($this->url) {
header("Location: $this->url");
} else {
$this->return404();
}
exit;
}
function run()
{
$this->init();
$this->getUrl();
$this->redirectUrl();
}
}
$share = Share::getInstance();
$share->run();
附录: 404.html(页面代码来源于网络)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="UTF-8" http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>404-对不起！您访问的页面不存在</title> <style type="text/css"> .head404{ width:580px; height:234px; margin:50px auto 0 auto; background:url(https://www.daixiaorui.com/Public/images/head404.png) no-repeat; } .txtbg404{ width:499px; height:169px; margin:10px auto 0 auto; background:url(https://www.daixiaorui.com/Public/images/txtbg404.png) no-repeat;} .txtbg404 .txtbox{ width:390px; position:relative; top:30px; left:60px;color:#eee; font-size:13px;} .txtbg404 .txtbox p {margin:5px 0; line-height:18px;} .txtbg404 .txtbox .paddingbox { padding-top:15px;} .txtbg404 .txtbox p a { color:#eee; text-decoration:none;} .txtbg404 .txtbox p a:hover { color:#FC9D1D; text-decoration:underline;} </style> </head> <body bgcolor="#494949"> <div class="head404"></div> <div class="txtbg404"> <div class="txtbox"> <p>对不起，您请求的页面不存在、或已被删除、或暂时不可用</p> <p class="paddingbox">请点击以下链接继续浏览网页</p> <p>》<a href="你的网站首页">返回网站首页</a></p> </div> </div> </body> </html> </html>
