A simple request class, makes use of CURL.

Request.php

<?php
  class Request {
 		public $curl_object;
		
		public function __construct($p_username = "", $p_password = "", $p_timeout = 15) 
		{
			$this->curl_object = curl_init();	
			
			curl_setopt($this->curl_object, CURLOPT_HTTPHEADER, Array("Accept: application/json", "Content-Type: application/json"));
			curl_setopt($this->curl_object, CURLOPT_CONNECTTIMEOUT, $p_timeout);
			curl_setopt($this->curl_object, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($this->curl_object, CURLOPT_SSL_VERIFYPEER, false);
			curl_setopt($this->curl_object, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0"); 
			
			if(!empty($p_username) && !empty($p_password)) {
				curl_setopt($this->curl_object, CURLOPT_USERPWD, $p_username . ":" . $p_password);
				curl_setopt($this->curl_object, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
			}
		}
		
		public function get_request($p_url) 
		{
			curl_setopt($this->curl_object, CURLOPT_URL, $p_url);
			return curl_exec($this->curl_object);
		}
		
		public function post_request($p_url, $p_post_data = "") 
		{
			curl_setopt($this->curl_object, CURLOPT_URL, $p_url);
			curl_setopt($this->curl_object, CURLOPT_POST, true);
			curl_setopt($this->curl_object, CURLOPT_POSTFIELDS, $p_post_data);
			return curl_exec($this->curl_object);
		}
		
		public function put_request($p_url) 
		{
			curl_setopt($this->curl_object, CURLOPT_URL, $p_url);
			curl_setopt($this->curl_object, CURLOPT_CUSTOMREQUEST, 'PUT');
			curl_setopt($this->curl_object, CURLOPT_POSTFIELDS, "");
			return curl_exec($this->curl_object);	
		}
		
		public function delete_request($p_url) 
		{
			curl_setopt($this->curl_object, CURLOPT_URL, $p_url);
			curl_setopt($this->curl_object, CURLOPT_CUSTOMREQUEST, 'DELETE');
			return curl_exec($this->curl_object);
		}
		
		public function close() 
		{
			curl_close($this->curl_object);
		}


		public function download($link , $filename = "file.tmp")
		{
			
			$fp = fopen ($filename, 'w+');//This is the file where we save the    information
			curl_setopt($this->curl_object, CURLOPT_URL, $link);
			curl_setopt($this->curl_object, CURLOPT_FILE, $fp); // write curl response to file
			curl_setopt($this->curl_object, CURLOPT_FOLLOWLOCATION, true);

			
		

			$ret = curl_exec($this->curl_object);
			fclose($fp);

			return $ret;
		}

		public function chunk_download($file_source, $file_target, $chunk = 4096)
		{
		    $rh = fopen($file_source, 'rb');
		    $wh = fopen($file_target, 'w+b');
		    if (!$rh || !$wh) 
		    {
		        return false;
		    }

		    while (!feof($rh)) 
		    {
		        if (fwrite($wh, fread($rh, $chunk)) === FALSE) {
		            return false;
		        }
		        echo ' ';
		        flush();
		    }

		    fclose($rh);
		    fclose($wh);

		    return true;
		}

	}
?>