filectime

(PHP 4, PHP 5)

filectimeGets inode change time of file

說明

int filectime ( string $filename )

Gets the inode change time of a file.

參數

filename

Path to the file.

回傳值

Returns the time the file was last changed, 或者在失敗時回傳 FALSE. The time is returned as a Unix timestamp.

範例

Example #1 A filectime() example

<?php

// outputs e.g.  somefile.txt was last changed: December 29 2002 22:16:23.

$filename 'somefile.txt';
if (
file_exists($filename)) {
    echo 
"$filename was last changed: " date("F d Y H:i:s."filectime($filename));
}

?>

錯誤/例外

失敗時拋出E_WARNING警告。

註釋

Note:

Note: In most Unix filesystems, a file is considered changed when its inode data is changed; that is, when the permissions, owner, group, or other metadata from the inode is updated. See also filemtime() (which is what you want to use when you want to create "Last Modified" footers on web pages) and fileatime().

Note:

Note also that in some Unix texts the ctime of a file is referred to as being the creation time of the file. This is wrong. There is no creation time for Unix files in most Unix filesystems.

Note:

注意:不同檔案系統對時間的判斷方法可能是不盡相同。

Note: 本函式的結果會被存入緩衝區。詳情參見 clearstatcache()

Tip

PHP 5.0.0 起本函式也可被某些 URL wrapper 使用。參考Supported Protocols and Wrappers 來看哪些 wrapper 支援 stat() 系列函式的功能。

參見

add a note add a note

User Contributed Notes 9 notes

up
13
StevieMc at example dot com
17 years ago
This method gets all the files in a directory, and echoes them in the order of the date they were added (by ftp or whatever).

<?PHP
function dirList ($directory, $sortOrder){

   
//Get each file and add its details to two arrays
   
$results = array();
   
$handler = opendir($directory);
    while (
$file = readdir($handler)) { 
        if (
$file != '.' && $file != '..' && $file != "robots.txt" && $file != ".htaccess"){
           
$currentModified = filectime($directory."/".$file);
           
$file_names[] = $file;
           
$file_dates[] = $currentModified;
        }   
    }
      
closedir($handler);

   
//Sort the date array by preferred order
   
if ($sortOrder == "newestFirst"){
       
arsort($file_dates);
    }else{
       
asort($file_dates);
    }
   
   
//Match file_names array to file_dates array
   
$file_names_Array = array_keys($file_dates);
    foreach (
$file_names_Array as $idx => $name) $name=$file_names[$name];
   
$file_dates = array_merge($file_dates);
   
   
$i = 0;

   
//Loop through dates array and then echo the list
   
foreach ($file_dates as $file_dates){
       
$date = $file_dates;
       
$j = $file_names_Array[$i];
       
$file = $file_names[$j];
       
$i++;
           
        echo 
"File name: $file - Date Added: $date. <br/>"";       
    }

}
?>

I hope this is useful to somebody.
up
2
website at us dot kaspersky dot com
16 years ago
Line 37 of the code above has an error.

echo  "File name: $file - Date Added: $date. <br/>""; 

There is an extra "  after the <br/> that needs to be deleted in order for this code to work.
up
2
soapergem at gmail dot com
14 years ago
Note that on Windows systems, filectime will show the file creation time, as there is no such thing as "change time" in Windows.
up
1
faketruth at yandex dot ru
8 years ago
If you need file creation time on Mac OS X:

<?php
if ($handle = popen('stat -f %B ' . escapeshellarg($filename), 'r')) {
   
$btime = trim(fread($handle, 100));
    echo
strftime("btime: %Y.%m.%d %H:%M:%S\n", $btime);
   
pclose($handle);
}
?>
up
2
chuck dot reeves at gmail dot com
16 years ago
filectime running on windows reading a file from a samba share, will still show the last modified date.
up
1
m dot rabe at directbox dot com
14 years ago
Under Windows you can use fileatime() instead of filectime().
up
1
javi at live dot com
15 years ago
Filemtime seems to return the date of the EARLIEST modified file inside a folder, so this is a recursive function to return the date of the LAST (most recently) modified file inside a folder.

<?php

// Only take into account those files whose extensions you want to show.
$allowedExtensions = array(
 
'zip',
 
'rar',
 
'pdf',
 
'txt'
);

function
filemtime_r($path)
{
    global
$allowedExtensions;
   
    if (!
file_exists($path))
        return
0;
   
   
$extension = end(explode(".", $path));    
    if (
is_file($path) && in_array($extension, $allowedExtensions))
        return
filemtime($path);
   
$ret = 0;
   
     foreach (
glob($path."/*") as $fn)
     {
        if (
filemtime_r($fn) > $ret)
           
$ret = filemtime_r($fn);   
           
// This will return a timestamp, you will have to use date().
    
}
    return
$ret;   
}

?>
up
1
coolkoon at gmail dot com
13 years ago
You should avoid feeding the function files without a path. This applies for filemtime() and possibly fileatime() as well. If you omit the path the command will fail with the warning "filectime(): stat failed for filename.php".
up
0
laurent dot pireyn at wanadoo dot be
22 years ago
If you use filectime with a symbolic link, you will get the change time of the file actually linked to. To get informations about the link self, use lstat.
To Top