/**

 * [http 调用接口函数]

 * @Date   2016-07-11

 * @Author GeorgeHao

 * @param  string       $url     [接口地址]

 * @param  array        $params  [数组]

 * @param  string       $method  [GET\POST\DELETE\PUT]

 * @param  array        $header  [HTTP头信息]

 * @param  integer      $timeout [超时时间]

 * @return [type]                [接口返回数据]

 */

function http($url, $params, $method = 'GET', $header = array(), $timeout = 5)

{

    // POST 提交方式的传入 $set_params 必须是字符串形式

    $opts = array(

        CURLOPT_TIMEOUT => $timeout,

        CURLOPT_RETURNTRANSFER => 1,

        CURLOPT_SSL_VERIFYPEER => false,

        CURLOPT_SSL_VERIFYHOST => false,

        CURLOPT_HTTPHEADER => $header

    );

    /* 根据请求类型设置特定参数 */

    switch (strtoupper($method)) {

        case 'GET':

            $opts[CURLOPT_URL] = $url . '?' . http_build_query($params);

            break;

        case 'POST':

            $params = http_build_query($params);

            $opts[CURLOPT_URL] = $url;

            $opts[CURLOPT_POST] = 1;

            $opts[CURLOPT_POSTFIELDS] = $params;

            break;

        case 'DELETE':

            $opts[CURLOPT_URL] = $url;

            $opts[CURLOPT_HTTPHEADER] = array("X-HTTP-Method-Override: DELETE");

            $opts[CURLOPT_CUSTOMREQUEST] = 'DELETE';

            $opts[CURLOPT_POSTFIELDS] = $params;

            break;

        case 'PUT':

            $opts[CURLOPT_URL] = $url;

            $opts[CURLOPT_POST] = 0;

            $opts[CURLOPT_CUSTOMREQUEST] = 'PUT';

            $opts[CURLOPT_POSTFIELDS] = $params;

            break;

        default:

            throw new Exception('不支持的请求方式！');

    }

    /* 初始化并执行curl请求 */

    $ch = curl_init();

    curl_setopt_array($ch, $opts);

    $data = curl_exec($ch);

    $error = curl_error($ch);

    return $data;

}