CURL badrequest 400 when submiting from webserver - php

Question

I'm trying to submit a form to a .aspx page with curl and then do something with the response. The problem is that my code works when I'm submiting it from my local xampp server but when submited from webserver I get "HTTP Error 400. The request URL is invalid."
I tried removing CURLOPT_POST option, found it somewhere on SO. I also tried urlencoding but then I get nothing.
$url = "http://www.somepage.com/locations/default.aspx#location_page_map";
$kv[]='search=92627';
$kv[]='__VIEWSTATE';
$kv[]='__EVENTTARGET';
$query_string = join("&", $kv);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, FALSE);
curl_setopt($ch, CURLOPT_POST, count($kv));
curl_setopt($ch, CURLOPT_POSTFIELDS, $query_string);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)');
$output = curl_exec($ch);
var_dump($output);
curl_close($ch);

Answer 1

You can actually leave out the __VIEWSTATE and __EVENTTARGET there most likely something todo with ASP's form value persistence, also you can remove the #location_page_map as thats just to focus the page on the map section, so will not impact the results from the service/site your trying to scrape. You then use http_build_query() to turn the array into a string for curl.
<?php
//$url = "http://www.myfitfoods.com/locations/default.aspx#location_page_map";
$url = "http://www.somepage.com/locations/default.aspx#location_page_map";
$kv['search'] = '92627';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, FALSE);
curl_setopt($ch, CURLOPT_POST, count($kv));
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($kv));
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)');
$output = curl_exec($ch);
var_dump($output);
curl_close($ch);

Answer 2

You haven't defined your $kv array propertly. Curl will take an array, but it has to be in key=>value format. All you've provided is 3 values. e.g. you'd actually be passing
=search%3D62627&=__VIEWSTATE&=__EVENTTARGET
^--no key ^---no key ^--- no key
Try:
$kv = array(
'search' => 92627,
'x' => '__VIEWSTATE',
'y' => '__EVENTTARGET'
)
curl_setopt($ch, CURL_POSTFIELDS, $kv);
or similar instead.