请求的资源不支持http方法'POST' - PHP

Question

我正在尝试使用CURLOPT_POST方法将字符串值发送到其他php文件，但是将结果作为 {“消息”：“请求的资源不支持http方法'POST'。”}

<?php 
            // create curl resource 
            $ch = curl_init("http://localhost/data.php"); 

            // set url 
            curl_setopt($ch, CURLOPT_URL, "http://nginx.api.askmegrocery.com/api/products/INDLSOUT001/571/0/0/0/2000/1"); 

            //return the transfer as a string 
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 

            // $output contains the output string 
            $output = curl_exec($ch); 

            $arrayvar=json_decode($output,true);

            //var_dump($arrayvar);
            for($row = 0; $row<1; $row++){

                var_dump( $arrayvar[$row]);

                $string = http_build_query($arrayvar[$row]);
                echo $string;
                curl_setopt($ch, CURLOPT_POST,true);
                curl_setopt($ch, CURLOPT_POSTFIELDS,$string);

                curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                //curl_exec($ch);
                $result = curl_exec($ch);
                print_r($result) ;
            }

            // close curl resource to free up system resources 
            curl_close($ch);  


    ?>

当我回显$ string时，我得到以下输出，这正是我想要的

Brand=Dabur&Displaytitle=Dabur+Glucon-D+1+kg&Name=Energy+Drinks&CategoryID=594&VariantID=17251&Itemid=1547358&CP=150&MRP=150&PctOff=0&Shippingcharges=0.00