   #PHP Manual Direct IO functions dio_read dio_stat

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                                   dio_seek

   (PHP 4 >= 4.2.0)
   dio_seek -- Seeks to pos on fd from whence

Description

   int dio_seek ( resource fd, int pos, int whence)

   The function dio_seek() is used to change the file position of the
   file with descriptor fd. The parameter whence specifies how the
   position pos should be interpreted:

     * SEEK_SET - specifies that pos is specified from the beginning of
       the file.
     * SEEK_CUR - Specifies that pos is a count of characters from the
       current file position. This count may be positive or negative.
     * SEEK_END - Specifies that pos is a count of characters from the
       end of the file. A negative count specifies a position within the
       current extent of the file; a positive count specifies a position
       past the current end. If you set the position past the current
       end, and actually write data, you will extend the file with zeros
       up to that position.
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