发布于 2015-08-27 16:47:37 | 156 次阅读 | 评论: 0 | 来源: 网络整理
The Filesystem component provides basic utilities for the filesystem.
小技巧
The lock handler feature was introduced in symfony 2.6. See the documentation for more information.
You can install the component in 2 different ways:
symfony/filesystem on Packagist);The Filesystem class is the unique
endpoint for filesystem operations:
use SymfonyComponentFilesystemFilesystem;
use SymfonyComponentFilesystemExceptionIOExceptionInterface;
$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();
}
注解
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() creates a directory.
On POSIX filesystems, directories are created with a default mode value
0777. You can use the second argument to set your own mode:
$fs->mkdir('/tmp/photos', 0700);
注解
You can pass an array or any Traversable object as the first
argument.
exists() checks for the
presence of all files or directories and returns false if a file is missing:
// this directory exists, return true
$fs->exists('/tmp/photos');
// rabbit.jpg exists, bottle.png does not exists, return false
$fs->exists(array('rabbit.jpg', 'bottle.png'));
注解
You can pass an array or any Traversable object as the first
argument.
copy() is used to copy
files. 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:
// 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() 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:
// 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);
注解
You can pass an array or any Traversable object as the first
argument.
chown() is used to change
the owner of a file. The third argument is a boolean recursive option:
// 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);
注解
You can pass an array or any Traversable object as the first
argument.
chgrp() is used to change
the group of a file. The third argument is a boolean recursive option:
// 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);
注解
You can pass an array or any Traversable object as the first
argument.
chmod() is used to change
the mode of a file. The fourth argument is a boolean recursive option:
// 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);
注解
You can pass an array or any Traversable object as the first
argument.
remove() is used to remove
files, symlinks, directories easily:
$fs->remove(array('symlink', '/path/to/directory', 'activity.log'));
注解
You can pass an array or any Traversable object as the first
argument.
rename() is used to rename
files and directories:
// 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:
// 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);
makePathRelative() returns
the relative path of a directory given another one:
// returns '../'
$fs->makePathRelative(
'/var/lib/symfony/src/Symfony/',
'/var/lib/symfony/src/Symfony/Component'
);
// returns 'videos/'
$fs->makePathRelative('/tmp/videos', '/tmp')
isAbsolutePath() returns
true if the given path is absolute, false otherwise:
// return true
$fs->isAbsolutePath('/tmp');
// return true
$fs->isAbsolutePath('c:Windows');
// return false
$fs->isAbsolutePath('tmp');
// return false
$fs->isAbsolutePath('../dir');
2.3 新版功能: The dumpFile() was introduced in Symfony 2.3.
dumpFile() allows you to
dump contents to 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):
$fs->dumpFile('file.txt', 'Hello World');
The file.txt file contains Hello World now.
A desired file mode can be passed as the third argument.
Whenever something wrong happens, an exception implementing
ExceptionInterface or
IOExceptionInterface is thrown.
注解
An IOException is
thrown if directory creation fails.