<?php
namespace kjwithdraw;

class Kjwithdraw
{
    /**
     * 除去数组中的空值和签名参数
     * @param $para 签名参数组
     * return 去掉空值与签名参数后的新签名参数组
     */
    function paraFilters($para) {
        $para_filter = array();
        foreach ($para as $key => $val) {
            if($key == "sign" || $val == "")continue;
            else	$para_filter[$key] = $para[$key];
        }
        return $para_filter;
    }

    /**
     * 对数组排序
     * @param $para 排序前的数组
     * return 排序后的数组
     */
    function argSorts($para) {
        ksort($para);
        reset($para);
        return $para;
    }

    /**
     * 签名验证-快接支付
     * $datas 数据数组
     * $key 密钥
     */
    function sign($datas = array(), $key = ""){
        $str = urldecode(http_build_query($this->argSorts($this->paraFilters($datas))));
//        print_r($str);exit;
        $sign = md5($str."&key=".$key);
        return $sign;
    }


    /**
     * 签名验证-快接支付
     * $datas 数据数组
     * $key 密钥
     */
    function getdata($url, $param){
        $content = '';
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);

        curl_setopt($ch, CURLOPT_POSTFIELDS, $param);

        curl_setopt($ch, CURLOPT_TIMEOUT,6);
        $content = curl_exec($ch);

        //如果发现异常，排查下curl错误
        //echo "curl错误：".curl_error($ch);

        curl_close($ch);
        return $content;
    }
}