<?php
use Hashids\Hashids;

/**
 * Here is your custom functions.
 */
    /*
    快速排序
*/
function quickSort($array)
{
    if(!isset($array[1]))
        return $array;
    $mid = $array[0]; //获取一个用于分割的关键字，一般是首个元素
    $leftArray = array();
    $rightArray = array();

    foreach($array as $v)
    {
        if($v > $mid)
            $rightArray[] = $v;  //把比$mid大的数放到一个数组里
        if($v < $mid)
            $leftArray[] = $v;   //把比$mid小的数放到另一个数组里
    }

    $leftArray = quickSort($leftArray); //把比较小的数组再一次进行分割
    $leftArray[] = $mid;        //把分割的元素加到小的数组后面，不能忘了它哦

    $rightArray = quickSort($rightArray);  //把比较大的数组再一次进行分割
    return array_merge($leftArray,$rightArray);  //组合两个结果
}

// 获取Hashids 对象
function getHashids(){
    global $hashids;
    if($hashids instanceof Hashids ){
        return $hashids;
    }
    $hashids = new Hashids('D6M97LIvpp4qWuz3nKzqi6yYN4GAA61b',32);
    return $hashids;
    
}

/**
 * 获取对象或数组的属性值
 * @param        $param
 * @param        $key
 * @param string $default
 * @return mixed|string
 */
function getProp($param, $key, $default = '')
{
    $result = $default;
    if (is_object($param) && isset($param->$key)) {
        $result = $param->$key;
    }

    if (is_array($param) && isset($param[$key])) {
        $result = $param[$key];
    }

    return $result;
}

/**
 * 获取真实IP
 */
function get_client_ip($type = 0, $adv = true)
{
    $type = $type ? 1 : 0;
    if ($adv) {
        if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
            $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
            $pos = array_search('unknown', $arr);
            if (false !== $pos) {
                unset($arr[$pos]);
            }
            $ip = trim($arr[0]);
        } elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
            $ip = $_SERVER['HTTP_CLIENT_IP'];
        } elseif (isset($_SERVER['REMOTE_ADDR'])) {
            $ip = $_SERVER['REMOTE_ADDR'];
        }
    } elseif (isset($_SERVER['REMOTE_ADDR'])) {
        $ip = $_SERVER['REMOTE_ADDR'];
    }
    // IP地址合法验证
    $long = sprintf("%u", ip2long($ip));
    $ip   = $long ? array($ip, $long) : array('0.0.0.0', 0);
    return $ip[$type];
}

/**
 * 获取真实IP
 */
function get_client_ua()
{
    $ua = $_SERVER['HTTP_USER_AGENT'];
    return $ua;
}