touch

<?

$filename = $_SERVER['DOCUMENT_ROOT'];

if(touch($filename))
{
    echo 'access time and modification time set to current time';
}
else
{
    echo 'touch() failed';
}

?>

access time and modification time set to current time

<?

$filename = $_SERVER['DOCUMENT_ROOT'];
$mtime = time() - 3600;

if(touch($filename, $mtime))
{
    echo 'access time and modification time set to one hour in the past';
}
else
{
    echo 'touch() failed';
}

?>

access time and modification time set to one hour in the past

<?

$filename = $_SERVER['DOCUMENT_ROOT'];
$mtime = time() - 3600;
$atime = time() - 7200;

if(touch($filename, $mtime, $atime))
{
    echo 'access time set to two hours in the past and modification time set to one hour in the past';
}
else
{
    echo 'touch() failed';
}

?>

access time set to two hours in the past and modification time set to one hour in the past

<?

$filename = $_SERVER['DOCUMENT_ROOT'];

$return = touch($filename);

var_export($return);

?>

true