   #PHP Manual Filesystem functions is_uploaded_file is_writeable

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                                  is_writable

   (PHP 4 )
   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.

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

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