Gather image file paths Recursively in PHP - php

Question

I am working on a pretty large PHP class that does a lot of stuff with Image Optimization from the Command line, you basically pass the program an Image path or a Folder path that has multiple images inside of it. It then runs the files through up to 5 other command line programs that optimize images.
Below is part of a loop that gathers the images paths, if the path is a Folder instead of an image path, it will iterate over all the images in the folder and add them to the image array.
So far I have everything working for single images and images in 1 folder. I would like to modify this section below so it could recursively go deeper then 1 folder to get the image paths.
Could someone possibly show me how I could modify this below to accomplish this?
// Get files
if (is_dir($path))
{
echo 'the path is a directory, grab images in this directory';
$handle = opendir($path);
// FIXME : need to run recursively
while(FALSE !== ($file = readdir($handle)))
{
if(is_dir($path.self::DS.$file))
{
continue;
}
if( ! self::is_image($path.self::DS.$file))
{
continue;
}
$files[] = $path.self::DS.$file;
}
closedir($handle);
}else{
echo 'the path is an Image and NOT a directory';
if(self::is_image($path))
{
echo 'assign image Paths to our image array to process = '. $path. '<br><br>';
$files[] = $path;
}
}
if (!count($files))
{
throw new NoImageFoundException("Image not found : $path");
}
UPDATE
#Chris's answer got me looking at the Docs and I found an example that I modified to this that seems to work
public static function find_recursive_images($path) {
$iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path),
RecursiveIteratorIterator::CHILD_FIRST);
foreach ($iterator as $path) {
if ($path->isDir()) {
//skip directories
continue;
} else {
$files[] = $path->__toString();
}
}
return $files;
}
...
$files = self::find_recursive_images($path);
echo '<pre>';
print_r($files);
echo '</pre>';
exit();
The output is JUST the filenames and there path like this which is my ultimate goal, so far this works perfect but as always if there is a better way I am all for improving
(
[0] => E:\Server\_ImageOptimize\img\testfiles\css3-generator.png
[1] => E:\Server\_ImageOptimize\img\testfiles\css3-please.png
[2] => E:\Server\_ImageOptimize\img\testfiles\css3-tools-10.png
[3] => E:\Server\_ImageOptimize\img\testfiles\fb.jpg
[4] => E:\Server\_ImageOptimize\img\testfiles\mysql.gif
[5] => E:\Server\_ImageOptimize\img\testfiles\OriginalImages\css3-generator.png
[6] => E:\Server\_ImageOptimize\img\testfiles\OriginalImages\css3-please.png
[7] => E:\Server\_ImageOptimize\img\testfiles\OriginalImages\css3-tools-10.png
[8] => E:\Server\_ImageOptimize\img\testfiles\OriginalImages\fb.jpg
[9] => E:\Server\_ImageOptimize\img\testfiles\OriginalImages\mysql.gif
[10] => E:\Server\_ImageOptimize\img\testfiles\OriginalImages\support-browsers.png
[11] => E:\Server\_ImageOptimize\img\testfiles\support-browsers.png
)

Answer 1

While andreas' answer probably works, you can also let PHP 5's RecursiveDirectoryIterator do that work for you and use a more OOP approach.
Here's a simple example:
$it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path));
while ($it->valid())
{
if ($it->isDot())
continue;
$file = $it->current();
if (self::is_image($file->pathName))
{
$files[] = $file->pathName;
}
$it->next();
}
Edit:
Alternatively, you could try this (copied from Zend_Translate_Adapter):
$it = new RecursiveIteratorIterator(
new RecursiveRegexIterator(
new RecursiveDirectoryIterator($dir, RecursiveDirectoryIterator::KEY_AS_PATHNAME),
'/^(?!.*(\.svn|\.cvs)).*$/', RecursiveRegexIterator::MATCH
),
RecursiveIteratorIterator::SELF_FIRST
);
foreach ($it as $dir => $info)
{
var_dump($dir);
}
Cheers
Chris

Answer 2

Create a recursive function to read a directory, then read further if a directory is found during the loop.
Something along the line of:
function r_readdir($path) {
static $files = array();
if(!is_dir($path)) {
echo 'the path is an Image and NOT a directory';
if(self::is_image($path))
{
echo 'assign image Paths to our image array to process = '. $path. '<br><br>';
$files[] = $path;
}
} else {
while(FALSE !== ($file = readdir($handle)))
{
if(is_dir($path.self::DS.$file))
{
r_readdir($path.self::DS.$file);
}
if( ! self::is_image($path.self::DS.$file))
{
continue;
}
}
closedir($handle);
}
return $files;
}