is_writable — Tells whether the filename is writable
Description
boolis_writable
( string$filename
)
Returns TRUE if the filename
exists and is
writable. The filename argument may be a directory name allowing you
to check if a directory is writable.
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.
Parameters
filename
The filename being checked.
Return Values
Returns TRUE if the filename
exists and is
writable.
Examples
Example #1 is_writable() example
<?php $filename = 'test.txt'; if (is_writable($filename)) { echo 'The file is writable'; } else { echo 'The file is not writable'; } ?>
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
List of Supported Protocols/Wrappers for a listing of which wrappers support
stat() family of functionality.
Load balance : Server 05
