cURL + HTTP_POST, keep getting 500 error. Has no idea?

Okay, I want to make a HTTP_POST using cURL to a SSL site. I already imported the certificate to my server. This is my code:

$url  = "https://www.xxx.xxx";
$post = "";# all data that going to send

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0'); 

$exe  = curl_exec($ch);
$getInfo = curl_getinfo($ch);

if ($exe === false) {
    $output 开发者_运维百科= "Error in sending";
    if (curl_error($ch)){
        $output .= "\n". curl_error($ch);
    }
} else if($getInfo['http_code'] != 777){
    $output = "No data returned. Error: " . $getInfo['http_code'];
    if (curl_error($ch)){
        $output .= "\n". curl_error($ch);
    }
}

curl_close($ch);

echo $output;

It keep returned "500". Based on w3schools, 500 means Internal Server Error. Is my server having problem? How to solve/troubleshoot this?

Some servers (especially requested with SSL) returns 500 in cases when some parameters of request is set incorrect.

To avoid «500 error» (for example) be sure to:

• set proper "Referer: " header if needed, with

curl_setopt(CURLOPT_REFERER, 'http://site.com/ref_page');

• set proper "User-Agent: " header, with

curl_setopt(CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)');

$url  = "https://www.xxx.xxx";
$post = "";# all data that going to send

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT    5.0'); 

$exe  = curl_exec($ch);
$getInfo = curl_getinfo($ch);

if ($exe === false) {
$output = "Error in sending";
if (curl_error($ch)){
    $output .= "\n". curl_error($ch);
}
} else if($getInfo['http_code'] != 777){
$output = "No data returned. Error: " . $getInfo['http_code'];//as preline
if (curl_error($ch)){
    $output .= "\n". curl_error($ch);
}
}

curl_close($ch);

echo $output;

BTW: Make sure that CURL moduel is installed.

You have something wrong inside your server or the script executed on the server which, maybe, throw an unhandled exception.

You should check the server's access and error logs.