php 한글 메뉴얼 도움말 검색 사이트 Sets access and modification time of file [function.touch]

설명

bool touch ( string $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.

인수

filename: The 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.

반환값

성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

변경점

버전	설명
5.3.0	It became possible to change the modification time of a directory under Windows.

예제

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';
}
?>

주의

Note:
시간 정밀도는 각각 파일 시스템에 따라 다를 수 있습니다.

Warning

Prior to PHP 5.3.0 it was not possible to change the modification time of a directory with this function under Windows.