<?php
namespace common\pay\eagle;

class PayUtils
{

     /**
     * @param array $data
     * @param string $secretKey
     * @return string
     */
    public static function makeSign($data, $secretKey)
    {
        $str = '';
        ksort($data);
        foreach ($data as $key => $value) {
            if ($key == 'sign') {
                continue;
            }
            $value = strval($value);
            if ($value === '') {
                continue;
            }
            $str .= "{$key}={$value}&";
        }
        $str = rtrim($str, '&') . "&key={$secretKey}";
        file_put_contents('190903.txt',$str);
        file_put_contents('190903md5.txt',strtoupper(md5($str)));
        return strtoupper(md5($str));
    }


    /**
     * @param array $data  参数
     * @param string $secretKey
     * @return bool
     */
    public static function checkSign($data, $secretKey)
    {
        $sign = isset($data['sign']) ? $data['sign'] : null;
        if ($sign == null) {
            return false;
        }
        return self::makeSign($data, $secretKey) === $sign;
	}
	

	/**
     * 发送post请求
     * @param string $url 请求地址
     * @param array $post_data post键值对数据
     * @return string
     */
    public static function sendPost($url, $post_data) {

        $postdata = http_build_query($post_data);
        $options = array(
            'http' => array(
                'method' => 'POST',
                'header' => 'Content-type:application/x-www-form-urlencoded',
                'content' => $postdata,
                'timeout' => 15 * 60 // 超时时间（单位:s）
            )
        );
        $context = stream_context_create($options);
        $result = file_get_contents($url, false, $context);

        return $result;
    }


}