Don't use substr, use bit operator
<?php
decoct(fileperms($file) & 0777); // return "755" for example
?>
If you want to compare permission
<?php
0755 === (fileperms($file) & 0777);
?>
fileperms
(PHP 4, PHP 5, PHP 7)
fileperms — Dosya izinlerini döndürür
Açıklama
fileperms
( string
$dosyaismi
) : intBelirtilen dosya ile ilgili izinleri döndürür.
Değiştirgeler
-
dosyaismi -
Dosya yolu.
Dönen Değerler
Bir hata durumunda FALSE, aksi takdirde dosyanın izinlerini döndürür.
Örnekler
Örnek 1 - İzinlerin sekizlik değer olarak gösterilmesi
<?php
echo substr(sprintf('%o', fileperms('/tmp')), -4);
echo substr(sprintf('%o', fileperms('/etc/passwd')), -4);
?>
Yukarıdaki örneğin çıktısı:
1777 0644
Örnek 2 - Tüm izinlerin gösterilmesi
<?php
$perms = fileperms('/etc/passwd');
if (($perms & 0xC000) == 0xC000) {
// Soket
$info = 's';
} elseif (($perms & 0xA000) == 0xA000) {
// Sembolik bağ
$info = 'l';
} elseif (($perms & 0x8000) == 0x8000) {
// Sıradan dosya
$info = '-';
} elseif (($perms & 0x6000) == 0x6000) {
// Blok aygıtı
$info = 'b';
} elseif (($perms & 0x4000) == 0x4000) {
// Dizin
$info = 'd';
} elseif (($perms & 0x2000) == 0x2000) {
// Karakter aygıtı
$info = 'c';
} elseif (($perms & 0x1000) == 0x1000) {
// FIFO boru
$info = 'p';
} else {
// Bilinmiyor
$info = 'u';
}
// Kullanıcı
$info .= (($perms & 0x0100) ? 'r' : '-');
$info .= (($perms & 0x0080) ? 'w' : '-');
$info .= (($perms & 0x0040) ?
(($perms & 0x0800) ? 's' : 'x' ) :
(($perms & 0x0800) ? 'S' : '-'));
// Grup
$info .= (($perms & 0x0020) ? 'r' : '-');
$info .= (($perms & 0x0010) ? 'w' : '-');
$info .= (($perms & 0x0008) ?
(($perms & 0x0400) ? 's' : 'x' ) :
(($perms & 0x0400) ? 'S' : '-'));
// Herkes
$info .= (($perms & 0x0004) ? 'r' : '-');
$info .= (($perms & 0x0002) ? 'w' : '-');
$info .= (($perms & 0x0001) ?
(($perms & 0x0200) ? 't' : 'x' ) :
(($perms & 0x0200) ? 'T' : '-'));
echo $info;
?>
Yukarıdaki örneğin çıktısı:
-rw-r--r--
Notlar
Bilginize: Bu işlevin sonuçları önbelleğe kaydedilir. Daha ayrıntılı bilgi edinmek için clearstatcache() işlevine bakınız.
İpucu
PHP 5.0.0 sürümünden itibaren bu işlev bazı URL sarmalayıcıları ile kullanılabilmektedir. stat() ailesini destekleyen sarmalayıcıların listesini Desteklenen Protokoller ve Sarmalayıcılar başlığı altında bulabilirsiniz.
Ayrıca Bakınız
- chmod() - Dosya kipini değiştirir
- is_readable() - Bir dosyanın mevcut ve okunabilir olup olmadığını söyler
- stat() - Bir dosya hakkında bilgi döndürür
add a note
User Contributed Notes 9 notes
coolmic at example dot com ¶
7 years ago
admin at torntech dot com ¶
8 years ago
This may not be immediately apparent to some, but you can use octdec( $octal_value ) to match the permissions retrieved by file perms
<?php
//assumes file has 2770 permissions
$perm= fileperms( __FILE__ );
$bit = "102770";
printf( "%s\n", octdec( $bit ) );
printf( "%s\n", $perm);
?>
paul2712 at gmail dot com ¶
13 years ago
Do not forget: clearstatcache();
==============================
When ever you make a:
mkdir($dstdir, 0770 ))
or a:
chmod($dstdir, 0774 );
You have to call:
clearstatcache();
before you can call:
fileperms($dstdir);
MartinAngermeier at gmx dot net ¶
11 years ago
An easy way to calculate fileperms to chmod is this:
substr(decoct(fileperms("test.html")),3);
Displays 666 or 777 (depends on chmod set).
substr(decoct(fileperms("test.html")),2);
Displays 0666 or 0777 and refers immediately to the number set with chmod();
chris at ocproducts dot com ¶
7 months ago
Windows has a very different file permission model to Unix and integrates them only minimally.
Here's how Windows calculates the bitmask...
u+w/g+w/o+w is set based on whether the file has the read only flag.
u+r/g+w/o+w is always set.
u+x/g+x/o+x is set based on whether $filename is an inherently executable file (e.g. bat) or a directory.
Windows isn't integrating its ACLs at all.
Here's the source of all this: https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/stat-functions?view=vs-2019 (but it doesn't provide many details)
sviscaino123 at hotmail dot fr ¶
10 years ago
Here is a small function I made : http://pastebin.com/iKky8Vtu
I was bored and I thought it could be useful.
mixed mkperms( string $perms [, bool return_as_string = false [, string $filename ] ] )
Returns permissions given a string in literal format and a filename.
If the file name is omitted, the permissions that the function will return are based on 000-permissions.
If return_as_string is set to true, the result will be output as a 644 format string. Otherwise it will return a string converted to base-10 for chmod.
Examples:
<?php
echo mkperms('u+r', true), "\n"; // 400
echo mkperms('u+rwx,g+rw,o+x', true), "\n"; // 761
touch('myfile.txt'); // Create a file with any permissions
chmod('myfile.txt', mkperms('u=rwx,g=x,o=rw')); // myfile.txt is now at -rwx--xrw-
// Make a file and give it full permissions
touch('somefile.txt');
chmod('somefile.txt', 0777);
echo mkperms('g-w,o-rw', true, 'somefile.txt'); // 751
echo mkperms('u=rwx,g-r,o=-', true, 'somefile.txt'); // 730
// This way you can apply permissions to files
chmod('somefile.txt', mkperms('u=rwx,g-r,o=-', false, 'somefile.txt')); // somefile.txt is now at -rwx-wx---
?>
PS : sorry I had to put it on pastebin, or else it just made the note way too long.
jchris dot fillionr at kitware dot com ¶
11 years ago
Since the output of decoct( fileperms('.') ) is of the form: 40644
It seems the previous example is wrong, instead you should understand:
To get permissions formatted as "644":
<?php
echo substr(decoct( fileperms('.') ), 2);
?>
To get permissions formatted as "0644":
<?php
echo substr(decoct( fileperms('.') ), 1);
?>
Dominic ¶
6 years ago
A small function for the last 3 digits (777/755 ect.)
<?php
function getFilePermission($file) {
$length = strlen(decoct(fileperms($file)))-3;
return substr(decoct(fileperms($file)),$length);
}
?>
chinello at gmail dot com ¶
13 years ago
On Linux (not tested on Windows), if you want a chmod-like permissions, you can use this function:
<?php
function file_perms($file, $octal = false)
{
if(!file_exists($file)) return false;
$perms = fileperms($file);
$cut = $octal ? 2 : 3;
return substr(decoct($perms), $cut);
}
?>
Using it:
$ touch foo.bar
$ chmod 0754 foo.bar
<?php
echo file_perms('foo.bar'); // prints: 754
echo file_perms('foo.bar', true); // prints 0754
?>
