The Filesystem Component

Version: 3.3
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The Filesystem Component

The Filesystem component provides basic utilities for the filesystem.

Installation

You can install the component in 2 different ways:

Then, require the vendor/autoload.php file to enable the autoloading mechanism provided by Composer. Otherwise, your application won't be able to find the classes of this Symfony component.

Usage

The Filesystem class is the unique endpoint for filesystem operations:

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use Symfony\Component\Filesystem\Filesystem;
use Symfony\Component\Filesystem\Exception\IOExceptionInterface;

$fs = new Filesystem();

try {
    $fs->mkdir('/tmp/random/dir/'.mt_rand());
} catch (IOExceptionInterface $e) {
    echo "An error occurred while creating your directory at ".$e->getPath();
}

Note

Methods mkdir(), exists(), touch(), remove(), chmod(), chown() and chgrp() can receive a string, an array or any object implementing Traversable as the target argument.

mkdir

mkdir() creates a directory recursively. On POSIX filesystems, directories are created with a default mode value `0777`. You can use the second argument to set your own mode:

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$fs->mkdir('/tmp/photos', 0700);

Note

You can pass an array or any Traversable object as the first argument.

Note

This function ignores already existing directories.

Note

The directory permissions are affected by the current umask. Set the umask for your webserver, use PHP's umask function or use the chmod function after the directory has been created.

exists

exists() checks for the presence of one or more files or directories and returns false if any of them is missing:

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// this directory exists, return true
$fs->exists('/tmp/photos');

// rabbit.jpg exists, bottle.png does not exist, return false
$fs->exists(array('rabbit.jpg', 'bottle.png'));

Note

You can pass an array or any Traversable object as the first argument.

copy

copy() makes a copy of a single file (use mirror() to copy directories). If the target already exists, the file is copied only if the source modification date is later than the target. This behavior can be overridden by the third boolean argument:

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// works only if image-ICC has been modified after image.jpg
$fs->copy('image-ICC.jpg', 'image.jpg');

// image.jpg will be overridden
$fs->copy('image-ICC.jpg', 'image.jpg', true);

touch

touch() sets access and modification time for a file. The current time is used by default. You can set your own with the second argument. The third argument is the access time:

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// set modification time to the current timestamp
$fs->touch('file.txt');
// set modification time 10 seconds in the future
$fs->touch('file.txt', time() + 10);
// set access time 10 seconds in the past
$fs->touch('file.txt', time(), time() - 10);

Note

You can pass an array or any Traversable object as the first argument.

chown

chown() changes the owner of a file. The third argument is a boolean recursive option:

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// set the owner of the lolcat video to www-data
$fs->chown('lolcat.mp4', 'www-data');
// change the owner of the video directory recursively
$fs->chown('/video', 'www-data', true);

Note

You can pass an array or any Traversable object as the first argument.

chgrp

chgrp() changes the group of a file. The third argument is a boolean recursive option:

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// set the group of the lolcat video to nginx
$fs->chgrp('lolcat.mp4', 'nginx');
// change the group of the video directory recursively
$fs->chgrp('/video', 'nginx', true);

Note

You can pass an array or any Traversable object as the first argument.

chmod

chmod() changes the mode or permissions of a file. The fourth argument is a boolean recursive option:

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// set the mode of the video to 0600
$fs->chmod('video.ogg', 0600);
// change the mod of the src directory recursively
$fs->chmod('src', 0700, 0000, true);

Note

You can pass an array or any Traversable object as the first argument.

remove

remove() deletes files, directories and symlinks:

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$fs->remove(array('symlink', '/path/to/directory', 'activity.log'));

Note

You can pass an array or any Traversable object as the first argument.

rename

rename() changes the name of a single file or directory:

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// rename a file
$fs->rename('/tmp/processed_video.ogg', '/path/to/store/video_647.ogg');
// rename a directory
$fs->rename('/tmp/files', '/path/to/store/files');

symlink() creates a symbolic link from the target to the destination. If the filesystem does not support symbolic links, a third boolean argument is available:

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// create a symbolic link
$fs->symlink('/path/to/source', '/path/to/destination');
// duplicate the source directory if the filesystem
// does not support symbolic links
$fs->symlink('/path/to/source', '/path/to/destination', true);

New in version 3.2

The readlink() method was introduced in Symfony 3.2.

readlink() read links targets.

PHP's readlink() function returns the target of a symbolic link. However, its behavior is completely different under Windows and Unix. On Windows systems, readlink() resolves recursively the children links of a link until a final target is found. On Unix-based systems readlink() only resolves the next link.

The readlink() method provided by the Filesystem component always behaves in the same way:

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// returns the next direct target of the link without considering the existence of the target
$fs->readlink('/path/to/link');

// returns its absolute fully resolved final version of the target (if there are nested links, they are resolved)
$fs->readlink('/path/to/link', true);

Its behavior is the following:

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public function readlink($path, $canonicalize = false)
  • When $canonicalize is false:
    • if $path does not exist or is not a link, it returns null.
    • if $path is a link, it returns the next direct target of the link without considering the existence of the target.
  • When $canonicalize is true:
    • if $path does not exist, it returns null.
    • if $path exists, it returns its absolute fully resolved final version.

makePathRelative

makePathRelative() takes two absolute paths and returns the relative path from the second path to the first one:

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// returns '../'
$fs->makePathRelative(
    '/var/lib/symfony/src/Symfony/',
    '/var/lib/symfony/src/Symfony/Component'
);
// returns 'videos/'
$fs->makePathRelative('/tmp/videos', '/tmp')

mirror

mirror() copies all the contents of the source directory into the target one (use the copy() method to copy single files):

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$fs->mirror('/path/to/source', '/path/to/target');

isAbsolutePath

isAbsolutePath() returns true if the given path is absolute, false otherwise:

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// return true
$fs->isAbsolutePath('/tmp');
// return true
$fs->isAbsolutePath('c:\\Windows');
// return false
$fs->isAbsolutePath('tmp');
// return false
$fs->isAbsolutePath('../dir');

dumpFile

dumpFile() saves the given contents into a file. It does this in an atomic manner: it writes a temporary file first and then moves it to the new file location when it's finished. This means that the user will always see either the complete old file or complete new file (but never a partially-written file):

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$fs->dumpFile('file.txt', 'Hello World');

The file.txt file contains Hello World now.

appendToFile

New in version 3.3

The appendToFile() method was introduced in Symfony 3.3.

appendToFile() adds new contents at the end of some file:

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$fs->appendToFile('logs.txt', 'Email sent to [email protected]');

If either the file or its containing directory doesn't exist, this method creates them before appending the contents.

Error Handling

Whenever something wrong happens, an exception implementing ExceptionInterface or IOExceptionInterface is thrown.

Note

An IOException is thrown if directory creation fails.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.