php random text include from directories

[Marquis]

Hello! For my Web site I have a number of directories that contain a number of text files with various bits of information that I wanted to display on my php pages. Ideally, I wanted to be able to include specifying the path to one or if possible to more of these folders; the function, then, would randomly choose one of the text files in the specified folder and return its contents.

[keyboard]

http://www.dynamicdrive.com/forums/s...347#post263347

This code should work fine

<?php
function RandomFile($folder='', $extensions=''){
 
    // fix path:
    $folder = trim($folder);
    $folder = ($folder == '') ? './' : $folder;
 
    // check folder:
    if (!is_dir($folder)){ die('invalid folder given!'); }
 
    // create files array
    $files = array();
 
    // open directory
    if ($dir = @opendir($folder)){
 
        // go trough all files:
        while($file = readdir($dir)){
 
            if (!preg_match('/^\.+$/', $file) and 
                preg_match('/\.('.$extensions.')$/', $file)){
 
                // feed the array:
                $files[] = $file;                
            }            
        }        
        // close directory
        closedir($dir);    
    }
    else {
        die('Could not open the folder "'.$folder.'"');
    }
 
    if (count($files) == 0){
        die('No files where found :-(');
    }
 
    // seed random function:
    mt_srand((double)microtime()*1000000);
 
    // get an random index:
    $rand = mt_rand(0, count($files)-1);
 
    // check again:
    if (!isset($files[$rand])){
        die('Array index was not found! very strange!');
    }
 
    // return the random file:
   return $folder . $files[$rand];
}
include RandomFile('foldername/','txt');

You need to edit this bit

include RandomFile('foldername/','txt');[/

Change folder name to the name of the folder with your txt files in it.

[djr33]

As discussed in your other thread, be very careful using include() like that. I think you want file_get_contents().

[keyboard]

How would you change the include to use file_get_contents. I've never used it before.

[djr33]

$stuff_from_file = file_get_contents($path);

You can also look on php.net for very detailed function descriptions.

include() grabs PHP code from a page and executes it. If that page happens to not include any PHP, then it will output it directly (into your html), but that's because it's really going through the PHP [but there isn't any]. This is a huge security risk though if you don't know what is in those files. (Especially if they are user generated.)

[keyboard]

So instaed of this

include RandomFile('foldername/','txt'); 

You would have to put this

$stuff_from_file = file_get_contents(foldername/); 

Is that right???

[traq]

more like:

$stuff_from_file = file_get_contents('path/to/file.txt');
// when you're ready:
print $stuff_from_file; 

[keyboard]

But the script gets the address dynamically so you can't put in the location of the file.

[djr33]

include RandomFile('foldername/','txt'); 

$stuff_from_file = file_get_contents(RandomFile('foldername/','txt'));
echo $stuff_from_file; 

[Marquis]

Thanks, it works fine.

is it also possible to scan subfolders and grab text files from ? How I Can Do that?