<?php


/***************When calling a API, change the following parameters depending on the API.*********************************/
/*************Take the `DescribeInstances` API as an example to describe how to locate the CVM with the specified `instanceId`.*********/

/*The URL address for the `DescribeInstances` API is “cvm.api.qcloud.com”, which is provided in the "1. API Description" chapter.*/
$HttpUrl="cvm.api.qcloud.com";

/*Unless otherwise specified, all APIs other than `MultipartUploadVodFile` support both GET and POST request methods. */
$HttpMethod="GET"; 

/*Whether HTTPS protocol is used. Most APIs are based on HTTPS protocol, except such APIs as `MultipartUploadVodFile`.*/
$isHttps =true;

/*Your key is required. You can obtain SecretId and $secretKey from https://console.tencentcloud.com/capi.*/
$secretKey='XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';


/*The following five parameters are common to all APIs. However, for some APIs (e.g. `DescribeDeals`) that are not region-specific, the `Region` parameter is not required.*/
$COMMON_PARAMS = array(
        'Nonce'=> rand(),
        'Timestamp'=>time(NULL),
        'Action'=>'DescribeInstances',
        'SecretId'=> 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',
        'Region' =>'gz',
);

/*The following two parameters are specific to the `DescribeInstances` API, which are used to query the specified CVM list.
$PRIVATE_PARAMS = array(
        'instanceIds.0'=> 'qcvm00001',
        'instanceIds.1'=> 'qcvm00002',
);


/***********************************************************************************/


CreateRequest($HttpUrl,$HttpMethod,$COMMON_PARAMS,$secretKey, $PRIVATE_PARAMS, $isHttps);


function CreateRequest($HttpUrl,$HttpMethod,$COMMON_PARAMS,$secretKey, $PRIVATE_PARAMS, $isHttps)
{
    $FullHttpUrl = $HttpUrl."/v2/index.php";

    /***************Sort the request parameters in ascending lexicographical order by their names on a case-sensitive basis.*************/
    $ReqParaArray = array_merge($COMMON_PARAMS, $PRIVATE_PARAMS);
    ksort($ReqParaArray);

    /**********************************Generate original signature string.**********************************
     * Concatenate the request method, URL address and sorted request parameters into the following format to generate the original signature string. In this example, the original signature string is as follows: 
     * GETcvm.api.qcloud.com/v2/index.php?Action=DescribeInstances&Nonce=345122&Region=gz
     * &SecretId=AKIDz8krbsJ5yKBZQ	·1pn74WFkmLPx3gnPhESA&Timestamp=1408704141
     * &instanceIds.0=qcvm12345&instanceIds.1=qcvm56789
     * ****************************************************************************/
    $SigTxt = $HttpMethod.$FullHttpUrl."?";

    $isFirst = true;
    foreach ($ReqParaArray as $key => $value)
    {
        if (!$isFirst) 
        { 
            $SigTxt = $SigTxt."&";
        }
        $isFirst= false;

        /*During concatenating the original signature string, replace any "_" in a parameter name with "." */
        if(strpos($key, '_'))
        {
            $key = str_replace('_', '.', $key);
        }

        $SigTxt=$SigTxt.$key."=".$value;
    }

    /*********************Generate a Signature based on the original signature string $SigTxt.******************/
    $Signature = base64_encode(hash_hmac('sha1', $SigTxt, $secretKey, true));


    /*************Concatenate the request strings. The request parameters and the signature string need to be encoded using urlencode.*******************/
    $Req = "Signature=".urlencode($Signature);
    foreach ($ReqParaArray as $key => $value)
    {
        $Req=$Req."&".$key."=".urlencode($value);
    }

    /*********************************Send requests********************************/
    if($HttpMethod === 'GET')
    {
        if($isHttps === true)
        {
            $Req="https://".$FullHttpUrl."?".$Req;
        }
        else
        {
            $Req="http://".$FullHttpUrl."?".$Req;
        }

        $Rsp = file_get_contents($Req);

    }
    else
    {
        if($isHttps === true)
        {
            $Rsp= SendPost("https://".$FullHttpUrl,$Req,$isHttps);
        }
        else
        {
            $Rsp= SendPost("http://".$FullHttpUrl,$Req,$isHttps);
        }
    }

    var_export(json_decode($Rsp,true));
}

function SendPost($FullHttpUrl,$Req,$isHttps)
{

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $Req);

        curl_setopt($ch, CURLOPT_URL, $FullHttpUrl);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        if ($isHttps === true) {
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,  false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,  false);
        }

        $result = curl_exec($ch);

        return $result;
}