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Rechercher une fonction PHP

fileperms

Contents

(PHP 4, PHP 5, PHP 7)

fileperms — Gets file permissions

Description

fileperms ( string $filename ) : int

Gets permissions for the given file.

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Parameters

filename

Path to the file.

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Return Values

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 macOS.

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.

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Examples

Example #1 Display permissions as an octal value

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

The above example will output:

1777
0644

Example #2 Display full permissions

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

switch ($perms & 0xF000) {
    case 0xC000: // socket
        $info = 's';
        break;
    case 0xA000: // symbolic link
        $info = 'l';
        break;
    case 0x8000: // regular
        $info = 'r';
        break;
    case 0x6000: // block special
        $info = 'b';
        break;
    case 0x4000: // directory
        $info = 'd';
        break;
    case 0x2000: // character special
        $info = 'c';
        break;
    case 0x1000: // FIFO pipe
        $info = 'p';
        break;
    default: // 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;
?>

The above example will output:

-rw-r--r--

PHP: fileperms - Manual Home of Manuel PHP  Contents Haut

Errors/Exceptions

Upon failure, an E_WARNING is emitted.

PHP: fileperms - Manual Home of Manuel PHP  Contents Haut

Notes

Note: The results of this function are cached. See clearstatcache() for more details.

Tip

As of PHP 5.0.0, this function can also be used with some URL wrappers. Refer to Supported Protocols and Wrappers to determine which wrappers support stat() family of functionality.

PHP: fileperms - Manual Home of Manuel PHP  Contents Haut

See Also

Find a PHP function

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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-function.fileperms.html

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References

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

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The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

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