如何在PHP中实现微信卡券核销接口

function get_access_token($appid,$appsecret){  
    $url="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appid&secret=$appsecret";  
    $arr = Https_request($url);  
    $JSON = json_decode($arr,true);  
    return $json["access_token"];  
}  

function getSignature($param,$access_token){  
    
    $paramArray=$param;  
    array_push($paramArray,$access_token);  
    sort($paramArray,SORT_STRING);  
    $string1=implode($paramArray);  
    $signature=sha1($string1);  
    
    return $signature;  
}  

function consumeCard($card_id,$code,$access_token){  
    $url="https://api.weixin.qq.com/card/code/consume?access_token=$access_token";  
    $param['code']=$code;  
    $param['card_id']=$card_id;  
    $param['check_consume']=true;  
    $jsonParam=json_encode($param);  
    $result=https_request($url,$jsonParam);  
    $result=json_decode($result,true);  
    if($result['errcode']==0){  
        $card_info=$result;  
        $card_info['page_url']=$xiaojin_url."/";//核销成功后，前台跳转页面  
        return $card_info;  
    }else{  
        return FALSE;  
    }  
}