   #PHP Manual Zlib Compression Functions gzrewind gztell

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                                    gzseek

   (PHP 3, PHP 4 )
   gzseek -- Seek on a gz-file pointer

Description

   int gzseek ( resource zp, int offset)

   Sets the file position indicator for the file referenced by zp to
   offset bytes into the file stream. Equivalent to calling (in C)
   gzseek(zp, offset, SEEK_SET).

   If the file is opened for reading, this function is emulated but can
   be extremely slow. If the file is opened for writing, only forward
   seeks are supported; gzseek then compresses a sequence of zeroes up to
   the new starting position.

   Upon success, returns 0; otherwise, returns -1. Note that seeking past
   EOF is not considered an error.

   See also gztell() and gzrewind().
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