(PHP 4, PHP 5, PHP 7, PHP 8)
stat — Gives information about a file
Gathers the statistics of the file named by filename
. If filename
is a symbolic link, statistics are from the file itself, not the symlink. Prior to PHP 7.4.0, on Windows NTS builds the size
, atime
, mtime
and ctime
statistics have been from the symlink, in this case.
lstat() is identical to stat() except it would instead be based off the symlinks status.
filename
Path to the file.
Numeric | Associative | Description |
---|---|---|
0 | dev | device number *** |
1 | ino | inode number **** |
2 | mode | inode protection mode ***** |
3 | nlink | number of links |
4 | uid | userid of owner * |
5 | gid | groupid of owner * |
6 | rdev | device type, if inode device |
7 | size | size in bytes |
8 | atime | time of last access (Unix timestamp) |
9 | mtime | time of last modification (Unix timestamp) |
10 | ctime | time of last inode change (Unix timestamp) |
11 | blksize | blocksize of filesystem IO ** |
12 | blocks | number of 512-byte blocks allocated ** |
* On Windows this will always be 0
.
** Only valid on systems supporting the st_blksize type - other systems (e.g. Windows) return -1
.
*** On Windows, as of PHP 7.4.0, this is the serial number of the volume that contains the file, which is a 64-bit unsigned integer, so may overflow. Previously, it was the numeric representation of the drive letter (e.g. 2
for C:
) for stat(), and 0
for lstat().
**** On Windows, as of PHP 7.4.0, this is the identifier associated with the file, which is a 64-bit unsigned integer, so may overflow. Previously, it was always 0
.
***** On Windows, the writable permission bit is set according to the read-only file attribute, and the same value is reported for all users, group and owner. The ACL is not taken into account, contrary to is_writable().
The value of mode
contains information read by several functions. When written in octal, starting from the right, the first three digits are returned by chmod(). The next digit is ignored by PHP. The next two digits indicate the file type:
mode in octal | Meaning |
---|---|
0140000 | socket |
0120000 | link |
0100000 | regular file |
0060000 | block device |
0040000 | directory |
0020000 | character device |
0010000 | fifo |
0100644
and a directory could be 0040755
. In case of error, stat() returns false
.
Note: Because PHP's integer type is signed and many platforms use 32bit integers, some filesystem functions may return unexpected results for files which are larger than 2GB.
Upon failure, an E_WARNING
is emitted.
Version | Description |
---|---|
7.4.0 | On Windows, the device number is now the serial number of the volume that contains the file, and the inode number is the identifier associated with the file. |
7.4.0 | The size , atime , mtime and ctime statistics of symlinks are always those of the target. This was previously not the case for NTS builds on Windows. |
Example #1 stat() example
<?php
$stat = stat('C:\php\php.exe');
echo 'Access time: ' . $stat['atime'];
echo 'Modification time: ' . $stat['mtime'];
echo 'Device number: ' . $stat['dev'];
?>
Example #2 Using stat() information together with touch()
<?php
$stat = stat('C:\php\php.exe');
if (!$stat) {
echo 'stat() call failed...';
} else {
$atime = $stat['atime'] + 604800;
if (!touch('some_file.txt', time(), $atime)) {
echo 'Failed to touch file...';
} else {
echo 'touch() returned success...';
}
}
?>
Note:
Note that time resolution may differ from one file system to another.
Note: The results of this function are cached. See clearstatcache() for more details.
As of PHP 5.0.0, this function can also be used with some URL wrappers. Refer to Supported Protocols and Wrappers to determine which wrappers support stat() family of functionality.