gzseek(3) [php man page]

GZSEEK(3)								 1								 GZSEEK(3)

gzseek - Seek on a gz-file pointer

SYNOPSIS

       int gzseek (resource  $zp, int  $offset, [int  $whence = SEEK_SET])

DESCRIPTION

	Sets  the  file  position indicator for the given file pointer to the given offset byte 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(3) then compresses a sequence of zeroes up to the new starting position.

PARAMETERS

	      o $zp
		- The gz-file pointer. It must be valid, and must point to a file successfully opened by gzopen(3).

	      o $offset
		- The seeked offset.

	      o $whence
		-$whence values are:

		     o SEEK_SET - Set position equal to $offset bytes.

		     o SEEK_CUR - Set position to current location plus $offset.

	       If $whence is not specified, it is assumed to be SEEK_SET.

RETURN VALUES

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

EXAMPLES

       Example #1

	      gzseek(3) example

	      <?php
	      $gz = gzopen('somefile.gz', 'r');
	      gzseek($gz,2);
	      echo gzgetc($gz);
	      gzclose($gz);
	      ?>

SEE ALSO

       gztell(3), gzrewind(3).

PHP Documentation Group 														 GZSEEK(3)

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GZPASSTHRU(3)								 1							     GZPASSTHRU(3)

gzpassthru - Output all remaining data on a gz-file pointer

SYNOPSIS

       int gzpassthru (resource  $zp)

DESCRIPTION

	Reads to EOF on the given gz-file pointer from the current position and writes the (uncompressed) results to standard output.

       Note

	       You may need to call gzrewind(3) to reset the file pointer to the beginning of the file if you have already written data to it.

       Tip

	       If you just want to dump the contents of a file to the output buffer, without first modifying it or seeking to a particular offset,
	      you may want to use the readgzfile(3) function, which saves you the gzopen(3) call.

PARAMETERS

	      o $zp
		- The gz-file pointer. It must be valid, and must point to a file successfully opened by gzopen(3).

RETURN VALUES

	The number of uncompressed characters read from $gz and passed through to the input, or FALSE on error.

EXAMPLES

       Example #1

	      gzpassthru(3) example

	      <?php
	      $fp = gzopen('file.gz', 'r');
	      gzpassthru($fp);
	      gzclose($fp);
	      ?>

PHP Documentation Group 													     GZPASSTHRU(3)

Linux and UNIX Man Pages

gzseek(3) [php man page]

Check Out this Related Man Page