PHP 5.5.20 is available

fileperms

(PHP 4, PHP 5)

filepermsGets file permissions

Descrierea

int fileperms ( string $filename )

Gets permissions for the given file.

Parametri

filename

Path to the file.

Valorile întoarse

Returns the file's permissions as a numeric mode. Lower bits of this mode are the same as the permissions expected by chmod(), however on most platforms the return value will also include information on the type of file given as filename. The examples below demonstrate how to test the return value for specific permissions and file types on POSIX systems, including Linux and Mac OS X.

For local files, the specific return value is that of the st_mode member of the structure returned by the C library's stat() function. Exactly which bits are set can vary from platform to platform, and looking up your specific platform's documentation is recommended if parsing the non-permission bits of the return value is required.

Exemple

Example #1 Display permissions as an octal value

<?php
echo substr(sprintf('%o'fileperms('/tmp')), -4);
echo 
substr(sprintf('%o'fileperms('/etc/passwd')), -4);
?>

Exemplul de mai sus va afișa:

1777
0644

Example #2 Display full permissions

<?php
$perms 
fileperms('/etc/passwd');

if ((
$perms 0xC000) == 0xC000) {
    
// Socket
    
$info 's';
} elseif ((
$perms 0xA000) == 0xA000) {
    
// Symbolic Link
    
$info 'l';
} elseif ((
$perms 0x8000) == 0x8000) {
    
// Regular
    
$info '-';
} elseif ((
$perms 0x6000) == 0x6000) {
    
// Block special
    
$info 'b';
} elseif ((
$perms 0x4000) == 0x4000) {
    
// Directory
    
$info 'd';
} elseif ((
$perms 0x2000) == 0x2000) {
    
// Character special
    
$info 'c';
} elseif ((
$perms 0x1000) == 0x1000) {
    
// FIFO pipe
    
$info 'p';
} else {
    
// Unknown
    
$info 'u';
}

// Owner
$info .= (($perms 0x0100) ? 'r' '-');
$info .= (($perms 0x0080) ? 'w' '-');
$info .= (($perms 0x0040) ?
            ((
$perms 0x0800) ? 's' 'x' ) :
            ((
$perms 0x0800) ? 'S' '-'));

// Group
$info .= (($perms 0x0020) ? 'r' '-');
$info .= (($perms 0x0010) ? 'w' '-');
$info .= (($perms 0x0008) ?
            ((
$perms 0x0400) ? 's' 'x' ) :
            ((
$perms 0x0400) ? 'S' '-'));

// World
$info .= (($perms 0x0004) ? 'r' '-');
$info .= (($perms 0x0002) ? 'w' '-');
$info .= (($perms 0x0001) ?
            ((
$perms 0x0200) ? 't' 'x' ) :
            ((
$perms 0x0200) ? 'T' '-'));

echo 
$info;
?>

Exemplul de mai sus va afișa:

-rw-r--r--

Erori/Excepții

În cazul eșecului este emis un E_WARNING.

Note

Notă: Rezultatele acestei funcții sunt stocate în cache. Accesați clearstatcache() pentru mai multe detalii.

Sfat

Începând cu PHP 5.0.0 această funcție poate fi utilizată de asemenea cu unele învelișuri URL. Referiți-vă la Supported Protocols and Wrappers pentru a determina care învelișuri susțin familia de funcționalitate stat().

Vedeți de asemenea

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User Contributed Notes 8 notes

up
6
coolmic at example dot com
1 year ago
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);
?>
up
4
admin at torntech dot com
2 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);

?>
up
1
paul2712 at gmail dot com
7 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);
up
2
Dominic
9 months 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);
}
?>
up
1
MartinAngermeier at gmx dot net
6 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();
up
-1
sviscaino123 at hotmail dot fr
4 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.
up
-1
jchris dot fillionr at kitware dot com
5 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);
?>
up
-1
chinello at gmail dot com
7 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
?>
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