(PHP 4, PHP 5, PHP 7, PHP 8)

statGives information about a file


stat(string $filename): array|false

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.



Path to the file.

Return Values

stat() and fstat() result format
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 file types
mode in octal Meaning
0140000 socket
0120000 link
0100000 regular file
0060000 block device
0040000 directory
0020000 character device
0010000 fifo
So for example a regular file could be 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

/* Get file stat */
$stat stat('C:\php\php.exe');

 * Print file access time, this is the same 
 * as calling fileatime()
echo 'Access time: ' $stat['atime'];

 * Print file modification time, this is the 
 * same as calling filemtime()
echo 'Modification time: ' $stat['mtime'];

/* Print the device number */
echo 'Device number: ' $stat['dev'];

Example #2 Using stat() information together with touch()

/* Get file stat */
$stat stat('C:\php\php.exe');

/* Did we failed to get stat information? */
if (!$stat) {
'stat() call failed...';
} else {
     * We want the access time to be 1 week 
     * after the current access time.
$atime $stat['atime'] + 604800;

/* Touch the file */
if (!touch('some_file.txt'time(), $atime)) {
'Failed to touch file...';
    } else {
'touch() returned success...';



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.

See Also