PHP: touch - Manual

Description

bool touch ( string filename [, int time [, int atime]] )

Пытается установить время доступа и модификации файла с именем filename в значение time. Если аргумент time не указан, используется текущее время. Это эквивалентно тому, что делает функция utime (иногда её называют utimes). Если третий аргумент atime передан, время доступа указанного файла будет установлено в значение atime. Обратите внимание, что время доступа изменяется всегда, независимо от количества аргументов.

Если файл не существует, он будет создан. Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.

Пример 1. Пример использования функции touch()

<?php if (touch($FileName)) { echo "Время модификации файла $FileName было изменено на текущее"; } else { echo "Простите, не удалось изменить время модификации файла $FileName"; } ?>

touch

spam at webmastersguide dot com
01-Sep-2005 05:09


If you're going to go around deleting (unlinking) files

that you don't own just in order to change the modification

time on the file, you darn well better chown() the file 

back to it's original ownership after you are done and

chmod() it back to it's correct permissions.  Otherwise 

you will almost certainly break things.  Additionally the

code listed for touch()ing a file you don't own should 

set the file creation time back to it's original time if 

what is wanted is to just change the modification time.

Also, the code listed will break things if there is an i/o 

error such as disk full or too many files in the directory.

Here's how the code SHOULD be written:



Create the new file FIRST, rather than last, with a different

name such as $file.tmp.

Read the ownership, permissions, and creation time of the old file.

Set permissions and creation time of the new file the same as the old.

Rename the new file to the name of the old.

chown() the new file to the user that owned the file it's replacing.



Please be careful adding to the documentation if you've 

never taken programming 101.

rf_public at yahoo dot co dot uk
25-Jul-2005 12:19


Note: the script to touch a file you don't own will change it's owner so ensure permissions are correct or you could lose access to it

guy at forster design dot com
12-May-2005 03:42


Here's a little workaround that allows the PHP user to touch a file it doesn't own:



<?php



    $target_file = "/path/to/file/filename.txt"; //system filepath to your file

    $file_content = implode("",file($target_file));

    @unlink($target_file);

    if($savetofile = fopen($target_file, "w")) {

        fputs($savetofile, $file_content);

        fclose($savetofile);

    }

    $new_date = strtotime("23 April 2005"); // set the required date timestamp here

    touch($target_file,$new_date);

 

?>



Of course, PHP needs to have write access to the folder containing the file you want to touch, but that should be easy to arrange.

feathern at yahoo dot com
13-Aug-2002 03:31


Neat little script that will give you a list of all modified files in a certain folder after a certain date:



$filelist = Array();

$filelist = list_dir("d:\\my_folder");

for($i=0;$i<count($filelist);$i++){

    $test = Array();

    $test = explode("/",date("m/d/Y",filemtime($filelist[$i])));

//example of files that are later then

//06/17/2002

    if(($test[2] > 2001) && ($test[1] > 16) && ($test[0] > 5)){

        echo $filelist[$i]."\r\n";

    }

    clearstatcache();

}

function list_dir($dn){

    if($dn[strlen($dn)-1] != '\\') $dn.='\\';

    static $ra = array();

    $handle = opendir($dn);

    while($fn = readdir($handle)){

        if($fn == '.' || $fn == '..') continue;

        if(is_dir($dn.$fn)) list_dir($dn.$fn.'\\');

        else $ra[] = $dn.$fn;

    }

    closedir($handle);

    return $ra;

}

emilebosch at hotmail dot com
06-Oct-2001 03:41


To spare you ppl couple of hours of valuable time, you can only TOUCH a file that you own! Usually PHP is *nobody* 


Warm regards,


Emile Bosch

master at dreamphp dot com
15-May-2001 11:23


$filename = "test.dat";


if (!file_exists($filename)) {


  touch($filename); // Create blank file


  chmod($filename,0666);


}