<?php

	define ('DL_BUFFER', 16384);  

  

	function download ($blob, $filename) { 

		$filename = ereg_replace('[\\/:\*\?"<>\|;]', '_', str_replace('&#32;', ' ', $filename)); 

  

		$isIE = $isIE6 = false; 

  

		if (isset($_SERVER["HTTP_USER_AGENT"])) { 

			$HTTP_USER_AGENT = $_SERVER["HTTP_USER_AGENT"]; 



			if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false && strstr($HTTP_USER_AGENT, 'Opera') === false) { 

				$isIE = 1; 

			} 

			if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false && strstr($HTTP_USER_AGENT, 'Opera') === false) { 

				$isIE6 = 1; 

			} 

		} 

  

		header('Pragma: '); 

		header('Cache-Control: cache'); 

  

		if ($isIE) { 

			$filename = rawurlencode($filename); 

			header ("Pragma: public"); 

			header ("Cache-Control: no-store, max-age=0, no-cache, must-revalidate"); 

			header ("Cache-Control: post-check=0, pre-check=0", false); 

			header ("Cache-Control: private"); 

			header ("Content-Disposition: inline; filename=$filename"); 

		} 

 

		header ("Content-Type: application/octet-stream; name=\"$filename\""); 

		header ("Content-Disposition: attachment; filename=\"$filename\""); 

  

		if ($isIE && !$isIE6) { 

			header ("Content-Type: application/download; name=\"$filename\""); 

		} 

		else { 

	       header ("Content-Type: application/octet-stream; name=\"$filename\""); 

	    } 

	  

	    $size = strlen($blob); 

	  

	    $nb = ($size/DL_BUFFER); 

	    $reste = ($size%DL_BUFFER); 

	    for ($a=0; $a<$nb; $a++) { 

	      echo substr($blob, $a*DL_BUFFER, DL_BUFFER); 

	       flush(); 

	    } 

	  

	    echo substr($blob, -$reste); 

	    flush();  

	 }  

	 ?>