Класс FilesystemIterator

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

Введение

Итератор файловой системы

Обзор класса

class FilesystemIterator extends DirectoryIterator {

/* Константы */

public const int CURRENT_MODE_MASK;

public const int CURRENT_AS_PATHNAME;

public const int CURRENT_AS_FILEINFO;

public const int CURRENT_AS_SELF;

public const int KEY_MODE_MASK;

public const int KEY_AS_PATHNAME;

public const int FOLLOW_SYMLINKS;

public const int KEY_AS_FILENAME;

public const int NEW_CURRENT_AND_KEY;

public const int OTHER_MODE_MASK;

public const int SKIP_DOTS;

public const int UNIX_PATHS;

/* Методы */

public __construct(string $directory, int $flags = FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS)

public current(): string|SplFileInfo|FilesystemIterator

public getFlags(): int

public key(): string

public next(): void

public rewind(): void

public setFlags(int $flags): void

/* Наследуемые методы */

public DirectoryIterator::current(): mixed

public DirectoryIterator::getBasename(string $suffix = ""): string

public DirectoryIterator::getExtension(): string

public DirectoryIterator::getFilename(): string

public DirectoryIterator::isDot(): bool

public DirectoryIterator::key(): mixed

public DirectoryIterator::next(): void

public DirectoryIterator::rewind(): void

public DirectoryIterator::seek(int $offset): void

public DirectoryIterator::__toString(): string

public DirectoryIterator::valid(): bool

public SplFileInfo::getATime(): int|false

public SplFileInfo::getBasename(string $suffix = ""): string

public SplFileInfo::getCTime(): int|false

public SplFileInfo::getExtension(): string

public SplFileInfo::getFileInfo(?string $class = null): SplFileInfo

public SplFileInfo::getFilename(): string

public SplFileInfo::getGroup(): int|false

public SplFileInfo::getInode(): int|false

public SplFileInfo::getLinkTarget(): string|false

public SplFileInfo::getMTime(): int|false

public SplFileInfo::getOwner(): int|false

public SplFileInfo::getPath(): string

public SplFileInfo::getPathInfo(?string $class = null): ?SplFileInfo

public SplFileInfo::getPathname(): string

public SplFileInfo::getPerms(): int|false

public SplFileInfo::getRealPath(): string|false

public SplFileInfo::getSize(): int|false

public SplFileInfo::getType(): string|false

public SplFileInfo::isDir(): bool

public SplFileInfo::isExecutable(): bool

public SplFileInfo::isFile(): bool

public SplFileInfo::isLink(): bool

public SplFileInfo::isReadable(): bool

public SplFileInfo::isWritable(): bool

public SplFileInfo::openFile(string $mode = "r", bool $useIncludePath = false, ?resource $context = null): SplFileObject

public SplFileInfo::setFileClass(string $class = SplFileObject::class): void

public SplFileInfo::setInfoClass(string $class = SplFileInfo::class): void

public SplFileInfo::__toString(): string

}

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.
FilesystemIterator::FOLLOW_SYMLINKS: 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::OTHER_MODE_MASK: Маска используется для FilesystemIterator::getFlags() и FilesystemIterator::setFlags().
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

FilesystemIterator::__construct — Создаёт новый итератор файловой системы
FilesystemIterator::current — Текущий файл
FilesystemIterator::getFlags — Получение флагов настроек объекта
FilesystemIterator::key — Определение ключа текущего файла
FilesystemIterator::next — Перемещение указателя на следующий файл
FilesystemIterator::rewind — Перемещение указателя на начало
FilesystemIterator::setFlags — Задание флагов обработки

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Примечания пользователей 4 notes

down

paul at paulgarvin dot net ¶

10 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.

down

blackout at drunkenlords dot com ¶

3 years 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;
    }
}

down

thedilab at gmail dot com ¶

9 years ago

DirectoryIterator returns virtual directories "." and ".." in a loop.
But FilesystemIterator ignores them.

down

spamblocker1@yahoo ¶

4 months ago

Here's the difference between DirectoryIterator and FileSystemIterator.

FileSystemIterator extends DirectoryIterator, inheriting all of it's functionalities, but extending it with additional options and features:

- Additional flags and options (e.g., FileSystemIterator::SKIP_DOTS to skip . and .. entries).
- Offers more control and flexibility over the iteration process.
- Suitable for more complex directory traversal requirements where additional control is needed.

So if you just need the contents of a directory, use DirectoryIterator.

If you need to do directory traversal, use FileSystemIterator.

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