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Manual: is_writeable
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  is_readable
  Updated
Sat, 12 Aug 2000
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is_writeable

(PHP3 , PHP4 )

is_writeable -- Tells whether the filename is writeable

Description

bool is_writeable (string filename)

Returns true if the filename exists and is writeable. The filename argument may be a directory name allowing you to check if a directory is writeable.

Keep in mind that PHP may be accessing the file as the user id that the web server runs as (often 'nobody'). Safe mode limitations are not taken into account.

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

See also is_readable().


User Contributed Notes: is_writeable

brandy@klammeraffe.org
07-Jul-1999 08:48
<PRE>
&lt;?php
/*
\\
\\ -mat- filid brandy, brandy@ecrc.de, Cable&Wireless ECRC GmbH
\\ Wed Jul 7 14:47:43 CEST 1999
\\
\\ my_is_writeable.inc
\\ checks whether a file is writeable or not. PHP3 function is_writeable() is broken.
\\
*/

Function my_is_writeable( $filename ) {

clearstatcache();

$perms = @Fileperms( $filename );
$owner = @FileOwner( $filename );
eregi( "^uid=([0-9]*)", exec( "id"), $regs );
$apacheuid = $regs[1];

/* Hint: integers starting with '0' are octal */
$perms = 0777 & $perms;

if ( $apacheuid != $owner ) {
if ( 06 == ( 07 & $perms ) ) { return 1; } else { return 0; }
} else {
if ( 0600 == ( 0700 & $perms ) ) { return 1; } else { return 0; }
}
}
?>
</PRE>

hellekin@imaginet.fr
27-Oct-1999 09:07
It seems that is_writeable() became <b>is_writable()</b> in 4.0b2.

zeekamotay@hotmail.com
13-Feb-2000 11:38
My my_is_writeable() is shorter than yours is! :)

Using include_path:

function my_is_writeable ($file) {
return(@fclose(@fopen($file,"a",1)));
}

Not using include_path:

function my_is_writeable ($file) {
return(@fclose(@fopen($file,"a")));
}



laroche@nobug.lu
21-Mar-2000 05:39
Why can't I verify if a file like www.nobug.lu/index.php3 is readable, or writeable ? Because I wanna check is a file exists or not an with file_exists it don't work too, ... Well would be fine when someone could explain me this problem.

hellekin@imaginet.fr
21-Jul-2000 01:43
is_writeable() works in PHP 4.0.1pl2 (didn't check for earlier versions).

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