随机数

心已赠人 2022-05-15 02:23 233阅读 0赞

/**
     * @随机生成7位数字
     */
    function get_number7(){
        $a = range(0,9);
        for($i=0;$i<7;$i++){
            $b[] = array_rand($a);
        }
        $rs=join("",$b);
        return $rs;
    }

/**
     * 生成用户的uuid
     * @return string
     */
    function get_guid(){
        mt_srand((double)microtime()*10000);
        $charid = strtoupper(md5(uniqid(rand(), true)));
        $hyphen = chr(45);
        $uuid =  substr($charid, 0, 8).$hyphen
            .substr($charid, 8, 4).$hyphen
            .substr($charid,12, 4).$hyphen
            .substr($charid,16, 4).$hyphen
            .substr($charid,20,12) ;
        return strtolower($uuid);
    }

/**
    +----------------------------------------------------------
     * 生成随机字符串
    +----------------------------------------------------------
     * @param int       $length  要生成的随机字符串长度
     * @param string    $type    随机码类型：0，数字+大写字母；1，数字；2，小写字母；3，大写字母；4，特殊字符；-1，数字+大小写字母+特殊字符
    +----------------------------------------------------------
     * @return string
    +----------------------------------------------------------
     */
    function randCode($length = 5, $type = 0) {
        $arr = array(1 => "0123456789", 2 => "abcdefghijklmnopqrstuvwxyz", 3 => "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 4 => "~@#$%^&*(){}[]|");
        $code='';
        if ($type == 0) {
            array_pop($arr);
            $string = implode("", $arr);
        } else if ($type == "-1") {
            $string = implode("", $arr);
        } else {
            $string = $arr[$type];
        }
        $count = strlen($string) - 1;
        for ($i = 0; $i < $length; $i++) {
            $str[$i] = $string[rand(0, $count)];
            $code .= $str[$i];
        }
        return $code;
    }