• 网上搜集的加密解密函数


    看到有人写的这个代码,用来加密解密还不错,暂时收藏一下,貌似这个人挺有名气的

    <?php
    /**
     * MrPmvc加密解密类
     * @author 狂奔的蜗牛
     * @email  672308444@163.com
     * @version alpha
     * Usage:
     *      $key = new KEY('adfasdfs', 30);
            $e_txt = $key->encode('中文哦..aaaa');
            echo $e_txt.'<br/>';
            echo $key->decode($e_txt);
     */
    class KEY {
        private $expire = 0, $key = 'secret';
    
        public function __construct($key_str = null, $time_to_live = null) {
            if ($key_str) {
                self::setKey($key_str);
            }
            if ($time_to_live) {
                self::setExpire($time_to_live);
            }
        }
    
        public  function setExpire($time_to_live) {
            $this->expire = floatval($time_to_live);
        }
    
        public  function setKey($key_str) {
            $this->key = (string) $key_str;
        }
    
        public  function encode($tex, $key = null, $expire = 0) {
            $key = $key ? $key : $this->key;
            $expire = $expire ? $expire : $this->expire;
            $chrArr = 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');
            $tex.="~#~" . sprintf('%010d', $expire ? $expire + time() : 0) . "~#~";
            $key_b = $chrArr[rand() % 62] . $chrArr[rand() % 62] . $chrArr[rand() % 62] . $chrArr[rand() % 62] . $chrArr[rand() % 62] . $chrArr[rand() % 62];
            $rand_key = $key_b . $key;
            $rand_key = md5($rand_key);
            $texlen = strlen($tex);
            $reslutstr = "";
            for ($i = 0; $i < $texlen; $i++) {
                $reslutstr.=$tex{$i} ^ $rand_key{$i % 32};
            }
            $reslutstr = trim($key_b . base64_encode($reslutstr), "==");
            $reslutstr = substr(md5($reslutstr), 0, 8) . $reslutstr;
            return $reslutstr;
        }
    
        public  function decode($tex, $key = null) {
            $key = $key ? $key : $this->key;
            if (strlen($tex) < 14)
                return false;
            $verity_str = substr($tex, 0, 8);
            $tex = substr($tex, 8);
            if ($verity_str != substr(md5($tex), 0, 8)) {
                //完整性验证失败
                return false;
            }
            $key_b = substr($tex, 0, 6);
            $rand_key = $key_b . $key;
            $rand_key = md5($rand_key);
            $tex = base64_decode(substr($tex, 6));
            $texlen = strlen($tex);
            $reslutstr = "";
            for ($i = 0; $i < $texlen; $i++) {
                $reslutstr.=$tex{$i} ^ $rand_key{$i % 32};
            }
            $expiry_arr = array();
            preg_match('/^(.*)~#~(d{10})~#~$/', $reslutstr, $expiry_arr);
            if (count($expiry_arr) != 3) {
                //过期时间完整性验证失败
                return false;
            } else {
                $tex_time = $expiry_arr[2];
                if ($tex_time > 0 && $tex_time - time() <= 0) {
                    //验证码过期
                    return false;
                } else {
                    $reslutstr = $expiry_arr[1];
                }
            }
            return $reslutstr;
        }
    
    }
    
    
    $model=new KEY();
    $encode_string=$model->encode("lizhaoyao");
    var_dump($encode_string);
    $decode_string=$model->decode("2bc35493whObs1DwhMCgJeTFgJTUVIUwgBVQYJAgYABUwVSQ");
    var_dump($decode_string);

    效果如图:

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  • 原文地址:https://www.cnblogs.com/lizhaoyao/p/7762714.html
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