READ FOLDER FILES AND DISPLAY "PREV" AND "NEXT" LINKS FROM CURRENT PAGE

[DaleRobbins]

I'm looking for a routine that can be inserted into my php pages, that will read all the php files in the current folder... then echo a link to next file (sorted alphabetically from the present file), and a link to the previous file (also sorted alphabetical). Basically the type of sort really isn't that important, but am just trying to scroll from one page to the next through the entire folder. I've started with a basic script to list the directory, and I'm pretty much stumped after that. Any thoughts or assistance would be greatly appreciated. Thanks.

<< PREV NEXT >>

<?

$base = basename($_SERVER['PHP_SELF']);
echo $base;
echo "<br>";

$dirname = ".";
$dir = opendir($dirname);

while(false != ($file = readdir($dir)))
{
if (!preg_match('/(pdf|html|txt|bak|BAK|jpg|jpeg|lck|htaccess|htpasswd)/', $file))
{

if ($file != '.' &&
$file != '..' &&
$file != ".htaccess" &&
$file != "index.php" &&
$file != "finder.php")
$list[] = $file;
}
}

natcasesort($list);

foreach($list as $item) {
$itemfix = str_replace(" ","%20","$item");

echo("<a href='$itemfix'>$itemfix</a>");

echo "\n<br />";

}
?>

[sneakyimp]

Assuming your script above is working and spits out an alphabetical list of all the files in the same directory as the php file itself, you can search the array for $base like so:

// put this code right after the natcasesort line in your code
$current_file_index = array_search($base, $list); // the index of the current PHP script in the array of file names
if ($current_file_index === FALSE) {
  throw new Exception("current file was not found in the array of files"); // inconceivable? Or perhaps the current file is index.php or finder.php in which case you've excluded it
}

if ($current_file_index == 0) {
  // it's the first file, there is no previous file
  $previous_file = NULL;
} else {
  $previous_file = $list[$current_file_index-1]; // grab the file that is one less than the current file
}

if ($current_file_index == (sizeof($list) - 1)) {
  // it's the last file, there is no next file
  $next_file = NULL;
} else {
  $next_file = $list[$current_file_index+1]; // grab the file that is one greater than the current file
}