Recursive File Search (PHP)

Question

Hey Guys,

I'm trying to return the files in a specified directory using a recursive search. I successfully achieved this, however I want to add a few lines of code that will allow me to specify certain extensions that I want to be returned.

For example return only .jpg files in the directory.

Here's my code,

<?php
$it = new RecursiveDirectoryIterator("L:\folder\folder\folder");
foreach(new RecursiveIteratorIterator($it) as $file) {
echo $file . "<br/> \n";
}
?>

please let me know what I can add to the above code to achieve this, thanks

Answer 1

<?php
$it = new RecursiveDirectoryIterator("L:\folder\folder\folder");
$display = Array ( 'jpeg', 'jpg' );
foreach(new RecursiveIteratorIterator($it) as $file)
{
    if ( In_Array ( SubStr ( $file, StrrPos ( $file, '.' ) + 1 ), $display ) == true )
     echo $file . "<br/> \n";
}
?>

Answer 2

Try this, it uses an array of allowed file types and only echos out the file if the file extension exists within the array.

<?php
$it = new RecursiveDirectoryIterator("L:\folder\folder\folder");
$allowed=array("pdf","txt");
foreach(new RecursiveIteratorIterator($it) as $file) {
    if(in_array(substr($file, strrpos($file, '.') + 1),$allowed)) {
        echo $file . "<br/> \n";
    }
}
?>

You may also find that you could pass an array of allowed file types to your RecursiveDirectoryIterator class and only return files that match.

Answer 3

You should create a filter:

class JpegOnlyFilter extends RecursiveFilterIterator
{
    public function __construct($iterator)
    {
     parent::__construct($iterator);
    }

    public function accept()
    {
     return $this->current()->isFile() && preg_match("/\.jpe?g$/ui", $this->getFilename());
    }

    public function __toString()
    {
     return $this->current()->getFilename();
    }
}

$it = new RecursiveDirectoryIterator("L:\folder\folder\folder");
$it = new JpegOnlyFilter($it);
$it = new RecursiveIteratorIterator($it);

foreach ($it as $file)
    ...