   #PHP Manual Filesystem functions is_link is_uploaded_file

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                                  is_readable

   (PHP 3, PHP 4 )
   is_readable -- Tells whether the filename is readable

Description

   bool is_readable ( string filename)

   Returns TRUE if the filename exists and is readable.

   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_writable(), file_exists(), and fgets().
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