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touch(1) [bsd man page]

TOUCH(1)						      General Commands Manual							  TOUCH(1)

touch - update date last modified of a file SYNOPSIS
touch [ -c ] [ -f ] file ... DESCRIPTION
Touch attempts to set the modified date of each file. If a file exists, this is done by reading a character from the file and writing it back. If a file does not exist, an attempt will be made to create it unless the -c option is specified. The -f option will attempt to force the touch in spite of read and write permissions on a file. SEE ALSO
utimes(2) 7th Edition April 29, 1985 TOUCH(1)

Check Out this Related Man Page

TOUCH(3)								 1								  TOUCH(3)

touch - Sets access and modification time of file

bool touch (string $filename, [int $time = time()], [int $atime]) DESCRIPTION
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. PARAMETERS
o $filename - The name of the file being touched. o $time - The touch time. If $time is not supplied, the current system time is used. o $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 $time parameter. If neither are present, the current system time is used. RETURN VALUES
Returns TRUE on success or FALSE on failure. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.0 | | | | | | | It became possible to change the modification | | | time of a directory under Windows. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 touch(3) example <?php if (touch($filename)) { echo $filename . ' modification time has been changed to present time'; } else { echo 'Sorry, could not change modification time of ' . $filename; } ?> Example #2 touch(3) 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'; } ?> NOTES
Note Note that time resolution may differ from one file system to another. Warning Prior to PHP 5.3.0 it was not possible to change the modification time of a directory with this function under Windows. PHP Documentation Group TOUCH(3)
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