[PHP] Exploring the File System

Inspecting a Folder with scandir()
Ex: $files = scandir('../images');

Inspecting the Contents of a Folder with FilesystemIterator
Ex: $files = new FilesystemIterator('../images');

getFilename() The name of the file
getPath() The current object’s relative path minus the filename, or minus the folder name if the current object is a folder
getPathName() The current object’s relative path, including the filename or folder name, de-pending on the current type
getRealPath() The current object’s full path, including filename if appropriate
getSize() The size of the file or folder in bytes
isDir() True, if the current object is a folder (directory)
isFile() True, if the current object is a file
isReadable() True, if the current object is readable
isWritable() True, if the current object is writable


Restricting File Types with the RegexIterator
$files = new FilesystemIterator('.');
$files = new RegexIterator($files, '/\.(?:txt|csv)$/i');
foreach ($files as $file) {
  echo $file->getFilename() . '<br>';
}

Creating a Download Link
Ex: readfile($path);