<?php
    function set_modified_header($stamp){
        
        $browser = (!empty($_SERVER['HTTP_USER_AGENT'])) ? htmlspecialchars((string) $_SERVER['HTTP_USER_AGENT']) : '';
    	$last_load 	=  isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? strtotime(trim($_SERVER['HTTP_IF_MODIFIED_SINCE'])) : false;
        
    	if ((strpos(strtolower($browser), 'msie 6.0') === false) && (strpos(strtolower($browser), 'msie 8.0') === false))
    	{
    		if ($last_load !== false && $last_load <= $stamp)
    		{
    			if (substr(strtolower(@php_sapi_name()),0,3) === 'cgi')
    			{
    				header('Status: 304 Not Modified', true, 304);
    			}
    			else
    			{
    				header('HTTP/1.0 304 Not Modified', true, 304);
    			}
    			header('Pragma: public');
    			header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + 31536000));
    			return true;
    		}
    		else
    		{
    			header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $stamp) . ' GMT');
    		}
    	}
    	return false;
    }

    $row = #هتجيب الصف من الجددول من هنا

    $filename = 'file.txt';

    header('Content-type: text/plain');
    header('Content-disposition: attachment; filename='.$filename.'');
    header("Pragma: no-cache");
    header("Expires: 0");
    
    if (!set_modified_header($row['date']))
    {
        echo $row['content'];
    } 
	
?>