(PHP 4, PHP 5)
touch — Sets access and modification time of file
$filename
[, int $time = time()
[, int $atime
]] )
Attempts to set the access and modification times of the file named in the
filename parameter to the value given in
time.
Note that the access time is always modified, regardless of the number
of parameters.
If the file does not exist, it will be created.
filenameThe name of the file being touched.
time
The touch time. If time is not supplied,
the current system time is used.
atime
If present, the access time of the given filename is set to
the value of atime. Otherwise, it is set to
the value passed to the time parameter.
If neither are present, the current system time is used.
Returns TRUE on success or FALSE on failure.
| Version | Description |
|---|---|
| 5.3.0 | It became possible to change the modification time of a directory under Windows. |
Example #1 touch() example
<?php
if (touch($filename)) {
echo $filename . ' modification time has been changed to present time';
} else {
echo 'Sorry, could not change modification time of ' . $filename;
}
?>
Example #2 touch() using the time parameter
<?php
// This is the touch time, we'll set it to one hour in the past.
$time = time() - 3600;
// Touch the file
if (!touch('some_file.txt', $time)) {
echo 'Whoops, something went wrong...';
} else {
echo 'Touched file with success';
}
?>
Note:
Note that time resolution may differ from one file system to another.
Prior to PHP 5.3.0 it was not possible to change the modification time of a directory with this function under Windows.