Класс FilesystemIterator

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

Введение

Итератор файловой системы

Обзор классов

class FilesystemIterator extends DirectoryIterator implements SeekableIterator {
/* Константы */
const int CURRENT_AS_PATHNAME = 32;
const int CURRENT_AS_FILEINFO = 0;
const int CURRENT_AS_SELF = 16;
const int CURRENT_MODE_MASK = 240;
const int KEY_AS_PATHNAME = 0;
const int KEY_AS_FILENAME = 256;
const int FOLLOW_SYMLINKS = 512;
const int KEY_MODE_MASK = 3840;
const int NEW_CURRENT_AND_KEY = 256;
const int SKIP_DOTS = 4096;
const int UNIX_PATHS = 8192;
/* Методы */
public __construct(string $directory, int $flags = FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS)
public getFlags(): int
public key(): string
public next(): void
public rewind(): void
public setFlags(int $flags): void
/* Наследуемые методы */
public DirectoryIterator::getBasename(string $suffix = ""): string
public DirectoryIterator::key(): int|false
public DirectoryIterator::seek(int $offset): void
}

Предопределённые константы

FilesystemIterator::CURRENT_AS_PATHNAME

Заставляет метод FilesystemIterator::current() вернуть путь.

FilesystemIterator::CURRENT_AS_FILEINFO

Заставляет метод FilesystemIterator::current() вернуть экземпляр SplFileInfo.

FilesystemIterator::CURRENT_AS_SELF

Заставляет метод FilesystemIterator::current() вернуть $this (FilesystemIterator).

FilesystemIterator::CURRENT_MODE_MASK

Маскирует FilesystemIterator::current()

FilesystemIterator::KEY_AS_PATHNAME

Заставляет метод FilesystemIterator::key() вернуть путь.

FilesystemIterator::KEY_AS_FILENAME

Заставляет метод FilesystemIterator::key() вернуть имя файла.

Заставляет метод RecursiveDirectoryIterator::hasChildren() следовать символическим ссылкам.

FilesystemIterator::KEY_MODE_MASK

Маскирует FilesystemIterator::key()

FilesystemIterator::NEW_CURRENT_AND_KEY

То же, что FilesystemIterator::KEY_AS_FILENAME | FilesystemIterator::CURRENT_AS_FILEINFO.

FilesystemIterator::SKIP_DOTS

Пропускает точечные файлы (. и ..).

FilesystemIterator::UNIX_PATHS

Заставляет все пути использовать обратный слеш в Unix-стиле, независимо от настроек системы по умолчанию. Обратите внимание, что path, переданный в конструктор, не меняется.

Содержание

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User Contributed Notes 4 notes

up
65
paul at paulgarvin dot net
7 years ago
You may be wondering, like I did, what is the difference between this class and DirectoryIterator?

When you iteterate using DirectoryIterator each "value" returned is the same DirectoryIterator object. The internal state is changed so when you call isDir(), getPathname(), etc the correct information is returned. If you were to ask for a key when iterating you will get an integer index value.

FilesystemIterator (and RecursiveDirectoryIterator) on the other hand returns a new, different SplFileInfo object for each iteration step. The key is the full pathname of the file. This is by default. You can change what is returned for the key or value using the "flags" arguement to the constructor.
up
6
thedilab at gmail dot com
6 years ago
DirectoryIterator returns virtual directories "." and ".." in a loop.
But FilesystemIterator ignores them.
up
1
blackout at drunkenlords dot com
4 months ago
Here's a great little drop in replacement for FilesystemIterator I wrote to easily Iterate your filesystem, including:

* Sorting - using ArrayIterator
* Regex Matching - using RegexIterator
* Limiting - using LimitIterator

It's fully chainable

<?php

// Sort by filemtime
$files = (new AdvancedFilesystemIterator('/path/to/files'))->sortByMTime();

// Sort by filemtime -> Limit output to 10
$files = (new AdvancedFilesystemIterator('/path/to/files'))->sortByMTime()->limit(0, 10);

// Sort by filemtime -> Only get CSV files -> Limit to 10
$files = (new AdvancedFilesystemIterator('/path/to/files'))->sortByMTime()->match('/csv$/')->limit(0, 10);

// Sort by filemtime -> Only get CSV files -> Limit to 10 -> and back to sorting by Filename
$files = (new AdvancedFilesystemIterator('/path/to/files'))->sortByMTime()->match('/csv$/')->limit(0, 10)->sortByFilename();

// Sort by any of SplFileInfo's get*() methods i.e. Owner, CTime, Basename, ATime, Perms, Type, isFile, anything
$files = (new AdvancedFilesystemIterator('/path/to/files'))->sortByOwner();

// Foreach
foreach ((new AdvancedFilesystemIterator('/path/to/files'))->sortByMTime()->match('/csv$/')->limit(0, 10) AS $file)
{
    print
$file->getFilename() . "<br>\n";
}

// The Class
class AdvancedFilesystemIterator extends ArrayIterator
{
    public function
__construct(string $path, int $flags = FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS)
    {
       
parent::__construct(iterator_to_array(new FilesystemIterator($path, $flags)));
    }

    public function
__call(string $name, array $arguments)
    {
        if (
preg_match('/^sortBy(.*)/', $name, $m)) return $this->sort('get' . $m[1]);
        throw new
MemberAccessException('Method ' . $methodName . ' not exists');
    }

    public function
sort($method)
    {
        if (!
method_exists('SplFileInfo', $method)) throw new InvalidArgumentException(sprintf('Method "%s" does not exist in SplFileInfo', $method));

       
$this->uasort(function(SplFileInfo $a, SplFileInfo $b) use ($method) { return (is_string($a->$method()) ? strnatcmp($a->$method(), $b->$method()) : $b->$method() - $a->$method()); });

        return
$this;
    }

    public function
limit(int $offset = 0, int $limit = -1)
    {
        return
parent::__construct(iterator_to_array(new LimitIterator($this, $offset, $limit))) ?? $this;
    }

    public function
match(string $regex, int $mode = RegexIterator::MATCH, int $flags = 0, int $preg_flags = 0)
    {
        return
parent::__construct(iterator_to_array(new RegexIterator($this, $regex, $mode, $flags, $preg_flags))) ?? $this;
    }
}
up
-12
ohcc at 163 dot com
1 year ago
It's impossible to return dots (. and ..) by FilesystemIterator.
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