Here is how I am making a REST API Call and my url is in $url below. I am running it on WAMP server and basically I have saved this php(test.php) file
www folder and when I execute the url (localhost//test.php), I get 500 Internal Server error. I basically want to run the URL($url) when I 
run the PHP script. How should I overcome this problem? 
<?php 
    $method = "POST";
    $accessKey = "myaccesskey";
    $secretKey = "mysecretkey";
    date_default_timezone_set("UTC");
    $timeString = date("D, d M Y H:m:s", time()) . ' GMT'; 
    $url = "http://myurl.com";
    $signature = GenerateSignature($secretKey, $method, $timeString);
    $authorization = $accessKey . ":" . $signature;
    $ListDEsc = "test new description";
    $data = "ListDEsc=" . $ListDEsc;
    var_dump(CallAPI($method, $url, $timeString, $authorization, $data));  
    function CallAPI($method, $url, $timeString, $authorization, $data = false)
    {
        $curl = curl_init();
        switch ($method)
        {
            case "POST":
                curl_setopt($curl, CURLOPT_POST, 1);
                if ($data)
                    curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
                break;
            case "PUT":
                curl_setopt($curl, CURLOPT_PUT, 1);
                break;
            default:
                if ($data)
                    $url = sprintf("%s?%s", $url, http_build_query($data));
        }
        $accept = 'application/json';
        an so on...
The following post looks promising at the start but their goal was different than mine.
Error Log:
In C:\wamp\logs
I see two newly created files apache_error and php_error.
Inside php_error I have the following:
[22-Jul-2014 16:40:53 UTC] PHP Warning:  PHP Startup: Unable to load dynamic library 'c:/wamp/bin/php/php5.5.12/ext/php_ldap.dll' - The specified module could not be found.
 in Unknown on line 0   
Inside apache_error I have the following:
[Tue Jul 22 09:40:44.898375 2014] [mpm_winnt:notice] [pid 7672:tid 404] AH00455: Apache/2.4.9 (Win32) PHP/5.5.12 configured -- resuming normal operations
[Tue Jul 22 09:40:44.959381 2014] [mpm_winnt:notice] [pid 7672:tid 404] AH00456: Apache Lounge VC11 Server built: Mar 16 2014 12:13:13
[Tue Jul 22 09:40:44.959381 2014] [core:notice] [pid 7672:tid 404] AH00094: Command line: 'c:\\wamp\\bin\\apache\\apache2.4.9\\bin\\httpd.exe -d C:/wamp/bin/apache/apache2.4.9'
[Tue Jul 22 09:40:45.031389 2014] [mpm_winnt:notice] [pid 7672:tid 404] AH00418: Parent: Created child process 7148
[Tue Jul 22 09:40:54.412327 2014] [mpm_winnt:notice] [pid 7148:tid 320] AH00354: Child: Starting 64 worker threads.
Error on Browser Looks Like:
string '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
<title>500 - Internal server error.</title>
<style type="text/css">
<!--
body{margin:0;font-size:.7em;font-family:Verdana, Arial, Helvetica, sans-serif;background:#EEEEEE;}
fieldset{padding:0 15px 10px 15px;} 
h1{font-size:2.4em;margin:0;color:#FFF;}
h2{font-size:1.7'... (length=2007)
Test Done to see the working of Curl
Ran the following script:
<?php
  $curl_handle=curl_init();
  curl_setopt($curl_handle,CURLOPT_URL,'http://www.google.com');
  curl_setopt($curl_handle,CURLOPT_CONNECTTIMEOUT,2);
  curl_setopt($curl_handle,CURLOPT_RETURNTRANSFER,1);
  $buffer = curl_exec($curl_handle);
  curl_close($curl_handle);
  if (empty($buffer)){
      print "Nothing returned from url.<p>";
  }
  else{
      print $buffer;
  }
?>
Source of above Script: And I was successfully directed to google.com web page.
 
     
    