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# 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.

Eksempel 1. is_writable() example

`<?php $filename = 'test.txt'; if (is_writable($filename)) { echo 'The file is writable'; } else { echo 'The file is not writable'; } ?>`

> Bemærk: Resultatet af denne funktion er cached. Se clearstatcache() for flere detaljer.

> Vink: Fra og med PHP 5.0.0 kan denne funktion også bruges med nogle URL wrappers. Se Appendiks L for en liste over hvilke wrappers understøtter stat() familiens funktionalitet.

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

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