Overview
KB
Technical FAQ
PHP Manual
CSS2 Manual
HTML Manual
JS Guide
JS Reference
PhpDock Manual
Nu-Coder Manual
PhpExpress Manual
PHP Joomla
Development
Learn PHP
 
<is_uploaded_fileis_writeable>
Last updated: Tue, 19 Sep 2006

is_writable

(PHP 4, PHP 5)

is_writable -- Tells whether the filename is writable

Description

bool is_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 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.

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';
}
?>

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 Appendix M for a listing of which wrappers support stat() family of functionality.

See also is_readable(), file_exists(), and fwrite().




<is_uploaded_fileis_writeable>
Last updated: Tue, 19 Sep 2006