Are you sure you escaped the parameter correctly? Just use urlencode() for this purpose. Here is an example:
<?php
$url = 'http://localhost/';
$fields = array (
'param1' => 'val1',
'param2' => 'val2'
);
$qry = '';
foreach ($fields as $key => $value) {
$qry .= $key . '=' . urlencode($value) . '&';
}
$qry = rtrim($qry, '&');
// Alternatively, you can also use $qry = http_build_query($fields, '');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $qry);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);
var_dump($result);
?>
If you want to verify that the request was send properly, I would recommend netcat. Just set the URL to http://localhost:3333/ and then execute netcat using:
$ nc -l -p 3333
As expected, the request looks like this:
POST / HTTP/1.1
Host: localhost:3333
Accept: /
Content-Length: 23
Content-Type: application/x-www-form-urlencoded
param1=val1¶m2=val2