What are the request methods of Curl in php? Introduction to the four request methods of php curl

protected function https_request($url,$data=null){
    $curl = curl_init();
    curl_setopt($curl,CURLOPT_URL,$url);
    curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,FALSE);
    curl_setopt($curl,CURLOPT_SSL_VERIFYHOST,FALSE);
    if(!empty($data)){
        curl_setopt($curl,CURLOPT_POST,1);
        curl_setopt($curl,CURLOPT_POSTFIELDS,$data);
    }
    curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
    //下面这行是修改后增加的代码，就是配置设置host访问，发送的数据类型为application/json
    curl_setopt($curl, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json; charset=utf-8',
        'Content-Length: ' . strlen($data)
    ));
    $output = curl_exec($curl);
    curl_close($curl);
    return $output;
}

protected function curlPost($Url, $data){
    $ch = curl_init($Url);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);//$data JSON类型字符串
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Content-Length: ' . strlen($data)));
    $result = curl_exec($ch);
    curl_close ( $ch );
    return $result;
}

function file_get_contents_post($url, $post){
    $options = array(
        'http'=> array(
        'method'=>'POST',
        'header' => "Content-type: application/x-www-form-urlencoded ",
        'content'=> http_build_query($post),
        ),
    );
    $result = file_get_contents($url,false, stream_context_create($options));
    return $result;
}
$datare = file_get_contents_post("http://103.72.165.183/api/payment.aspx", $data);
var_dump($datare);

public function getSSLHttp($url){
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_HEADER, false);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE); // https请求 不验证证书和hosts
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        $data = curl_exec($curl);
        $httpCode = curl_getinfo($curl,CURLINFO_HTTP_CODE);
        if ( $httpCode != 200 ){
            $data="https connect timeout";
        }
        curl_close($curl);
        return $data;
    }