<?php
class CURL
{
	private $curlHandle = '';
	
	public function __construct()
	{
		if( $this->curlHandle == '' )
			$this->curlHandle = curl_init();
	}
	
	public function __destruct()
	{
		//if( $this->curlHandle != '' )
			curl_close($this->curlHandle);	
	}
	
	/* 				uploadFile
	*$fileName = the file to be uploaded
	*success: return the CURL transmission
	*error: return string 
	*/
	public function uploadFile($fileName)
	{
		$tmp = '';
		$fp  = '';
		if($fileName != '' || file_exists($fileName) )
		{
			$fp = fopen($fileName, 'rb');
	
			$this->setCurlOptions(CURLOPT_CONNECTTIMEOUT, 10);
			$this->setCurlOptions(CURLOPT_POST, true);
			$this->setCurlOptions(CURLOPT_RETURNTRANSFER, true);
			$this->setCurlOptions(CURLOPT_UPLOAD, true);
			$this->setCurlOptions(CURLOPT_INFILE, $fp);
			$this->setCurlOptions(CURLOPT_INFILESIZE, filesize($fileName));
			
			$tmp = curl_exec($this->curlHandle);
			fclose($fp);
			
			return $tmp;
		}else{  return 'Bad file name: ' . $fileName;  }
	}
	
	/*				submitData
	*$type = type of submission. options: post or get
	*$header = array used to submit different headers with the get/post
	*/
	public function submitData($type='post', $headers='')
	{
		//setup common options for CURL
		$this->setCurlOptions(CURLOPT_RETURNTRANSFER, true);
		$this->setCurlOptions(CURLOPT_CONNECTTIMEOUT, 10);
		$this->setCurlOptions(CURLOPT_UPLOAD, false);
		if( $headers )
			$this->setCurlOptions(CURLOPT_HTTPHEADER, $header);
		if( $type == 'post' ){
			//setup CURL for post
			$this->setCurlOptions(CURLOPT_POST, true);
		}elseif( $type == 'get' ){
			//setup cURL for get
			$this->setCurlOptions(CURLOPT_HTTPGET, true);
		}
		
		return curl_exec($this->curlHandle);
	}
	
	//helper funcs
	
	//set the options for cURL
	public function setCurlOptions($key, $value)
	{
		curl_setopt($this->curlHandle, $key, $value);
	}
	
	//retrieve the cURL transfer details
	//param: $option - retrieve specific detail
	public function getTransferDetails($option = '')
	{
		return $option != '' ? curl_getinfo($this->curlHandle, $option) : curl_getinfo($this->curlHandle);
	}
	
	//returns the last error for current cURL session
	public function getLastError()
	{
		return curl_error($this->curlHandle);
	}
	
}