How to limit/filter scandir() response

[Claus Mygind]

I want to return the content (list of files) in a folder to an array. In my dBase program I can filter the content by adding a skeleton file description like this *.pdf

Is there a way to limit/filter the response when using the php command: $files = scandir($dir);

I see in the manual something called $context as in
array scandir ( string $directory [, int $sorting_order = 0 [, resource $context ]] )

When researching that, the manual got a little fuzzy for me.

Could any one complete this line for me

$files = scandir($dir, 1 [, resource $context ] )

where it would only return any .pdf file?

[Claus Mygind]

am I even on the right track with something like this

 
$params['paramname'] = ".pdf";
$files2 = scandir($cDir,1,stream_context_set_params( $cDir , $params['paramname'] ));

[Claus Mygind]

If no better answer exist, I guess I will have to go with these extra steps to accomplish the same job of filtering the data.

<?php
if (is_dir($cDir)) {
   $files2 = scandir($cDir);
   foreach ($files2 as &$value)
   {
      $parts = explode(".", $value);
      if (strtoupper(end($parts)) == "PDF") {
         echo $value. "<br/>";
      }
   }
   unset($value);
}
?>

It seems a bit much code for such a small task. Hope there is something better.

[Dormilich]

look into GlobIterator, that’s made for something like that.

[Claus Mygind]

Thank you for the reference. At this time the manual is beyond my comprehension for this command.

I did try the link to glob() and that will cut out the one if statement to test for file type.

<?php
foreach (glob("*.txt") as $filename) {
    echo "$filename size " . filesize($filename) . "\n";
}
?>
 

[Dormilich]

the GlobIterator code doesn’t look much different:

foreach (new GlobIterator("*.txt") as $file)
{
    echo $file, " size ", $item->getSize(), PHP_EOL;
}

[Claus Mygind]

Thanks for that explanation. Why can't they put something that simple in the manual for easy comprehension.

[Dormilich]

this is the example from the manual slightly rewritten for your problem (though the example is listed under GlobIterator::__construct())

but yes, SPL is way underdocumented