PHP curl post的content-type导致获取不到数据的问题

<?php

$url="http://www.otcmarkets.com/edgar/ajax/GetFilings.json";

$keysArr = array(

    "symbol"=>"FSCND",

    "body"=>"[object HTMLDivElement]",

    "progressBarBody"=>"[object HTMLQuoteElement]",

    "progressBarOn"=>"true",

    "progressBarCount"=>"0",

    "progressBarIntervalId"=>"2255",

    "pageSize"=>"10"

);

$keysArr = 'bady=[object HTMLDivElement]&pageSize=10&progressBarBody=[object HTMLBlockElement]&progressBarCount=0&progressBarIntervalId=453&progressBarOn=true&symbol=FSCND';

//↑这样的content-type是application/x-www-form-urlencoded

//↓这个却是multipart/form-data; boundary=---...

/*$keysArr =

    "symbol=".urlencode("FSCND").

    "&body=".urlencode("[object HTMLDivElement]").

    "&progressBarBody=".urlencode("[object HTMLQuoteElement]").

    "&progressBarOn=".urlencode("true").

    "&progressBarCount=".urlencode("0").

    "&progressBarIntervalId=".urlencode("2255").

    "&pageSize=".urlencode("10");

*/

//$keysArr =  array("gid"=>"518b657e8ead0e0f3600002a","token"=>"MGVmMStnZTYzd2R2OUMrdHJ4cHBteDNCV0FLdFFTSjF3OW9pYnZvdllFWVQ6Nzc2M0RXdGthNDB3NnJiNTMwN21EblRuNU9VUUI0c29UalBEdWxiZi96cStVb2xPZ3l0bzRRWWN0YUYwaWJMRGlZTU5qQU10YTlKUTlseUsvdw==","key"=>"204009a2fe7165d4f48239f91bc0d9d8");;

// echo md5("lijuan698191");

// $keysArr = array('login_type'=>0,'key'=>"204009a2fe7165d4f48239f91bc0d9d8",'login_time'=>"1387128272",'mobile_info'=> "moxian:iphone&105&3d7b8b0c74b314ab1815b76f989d79e8&6.1&iPhone Simulator",'user_name'=>"guo_yu_bin@yeah.net",'user_pwd'=> "828a966d1af427fa58bf08d9c131aac5");

// $keysArr  =  array("gid"=>"5188760b7f8b9a643b000002");

$ch = curl_init();

curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

curl_setopt($ch, CURLOPT_POST, TRUE);

curl_setopt($ch, CURLOPT_POSTFIELDS, $keysArr);    //参数

curl_setopt($ch, CURLOPT_URL, $url);

//curl_setopt($ch, CURLOPT_HEADER ,TRUE);

$ret = curl_exec($ch);

curl_close($ch);
echo $ret;

转自：https://www.cnblogs.com/arliang/archive/2013/05/10/PHP_curl_content_type.html