PHP用CURL发送Content-type为application/json的POST和GET请求方法

POST请求方法

function json_post($url, $data = NULL)
{

    $curl = curl_init();

    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
    if(!$data){
        return 'data is null';
    }
    if(is_array($data))
    {
        $data = json_encode($data);
    }
    curl_setopt($curl, CURLOPT_POST, 1);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    curl_setopt($curl, CURLOPT_HEADER, 0);
    curl_setopt($curl, CURLOPT_HTTPHEADER,array(
            'Content-Type: application/json; charset=utf-8',
            'Content-Length:' . strlen($data),
            'Cache-Control: no-cache',
            'Pragma: no-cache'
    ));
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $res = curl_exec($curl);
    $errorno = curl_errno($curl);
    if ($errorno) {
        return $errorno;
    }
    curl_close($curl);
    return $res;

}

GET请求方法

 public function json_get($url){
    $header = array(
        'Accept: application/json',
    );
    $curl = curl_init();
    //设置抓取的url
    curl_setopt($curl, CURLOPT_URL, $url);
    //设置头文件的信息作为数据流输出
    curl_setopt($curl, CURLOPT_HEADER, 0);
    // 超时设置,以秒为单位
    curl_setopt($curl, CURLOPT_TIMEOUT, 1);

    // 超时设置，以毫秒为单位
    // curl_setopt($curl, CURLOPT_TIMEOUT_MS, 500);

    // 设置请求头
    curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
    //设置获取的信息以文件流的形式返回，而不是直接输出。
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
    //执行命令
    $data = curl_exec($curl);

    // 显示错误信息
    if (curl_error($curl)) {
        print "Error: " . curl_error($curl);
    } else {
        // 打印返回的内容
        curl_close($curl);
        return $data;
    }
}