php基於tp5.1 實現短連結功能 (redis+nginx)

阿新 • • 發佈：2020-11-05

生成及儲存短連結

// 生成短連結
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;
}


// 儲存短連結對應的長連結
function set_cache($real_url, $expire = 3600)
{
    $key = get_rand_str(6);
    // cache 為redis例項, 此處以tp5.1為例, 其他框架需更改為自己的用法
    if (cache($key)) {
        return self::set_cache($real_url);
    } else {
        cache($key, $real_url, $expire);
    }

     
return $key;
}

　　2. 更改nginx配置, 將短連結重定向到處理檔案

server{
  ....

    #短連結(http(s)://xxx.com/s/xxx)重定向到 s資料夾下的share.php處理檔案
       location /s/ {
            rewrite ^(/s/)(.*)$ $1/share.php?k=$2;
    }      
}

share.php檔案

<?php

/**
 * @desc Class Share 分享處理類
 * @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;

    //構造方法私有化，防止外部建立例項
    private function __construct()
    {
    }

    public static function getInstance()
    {
        //判斷例項有無建立，沒有的話建立例項並返回，有的話直接返回
        if (!(self::$instance instanceof self)) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    private function init()
    {
        $this->getConfig();
        $this->initRedisHandle();
    }

    /**
     * @desc 獲取配置
     */
    private function getConfig()
    {
//        $this->config = include_once './config.php';
        $this->config = [
            'redis' => [
                'host' => '127.0.0.1',
                'port' => 6379,
                // 全域性快取有效期（0為永久有效）
                'expire' => 3600,
                // 快取字首
                '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()
    {
        // 獲取get引數k
        $k = isset($_GET['k']) ? $_GET['k'] : '';
        if (!$k) {
            $this->return404();
        }

        // 獲取快取資訊
        $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();

附錄: 404.html(頁面程式碼來源於網路)

<!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-對不起！您訪問的頁面不存在</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>對不起，您請求的頁面不存在、或已被刪除、或暫時不可用</p>

        <p class="paddingbox">請點選以下連結繼續瀏覽網頁</p>
        <p>》<a href="你的網站首頁">返回網站首頁</a></p>

    </div>

</div>

</body>

</html>
</html>