php man page for xdiff_file_rabdiff

XDIFF_FILE_RABDIFF(3)							 1						     XDIFF_FILE_RABDIFF(3)

xdiff_file_rabdiff - Make binary diff of two files using the Rabin's polynomial fingerprinting algorithm

SYNOPSIS
       bool xdiff_file_rabdiff (string	$old_file, string  $new_file, string  $dest)

DESCRIPTION
	Makes  a  binary  diff of two files and stores the result in a patch file. The difference between this function and xdiff_file_bdiff(3) is
       different algorithm used which should result in faster execution and smaller diff produced. This function works with both text  and  binary
       files. Resulting patch file can be later applied using xdiff_file_bpatch(3)/xdiff_string_bpatch(3).

	For more details about differences between algorithm used please check libxdiff website.

PARAMETERS
	      o $old_file
		- Path to the first file. This file acts as "old" file.

	      o $new_file
		- Path to the second file. This file acts as "new" file.

	      o $dest
		-  Path of the resulting patch file. Resulting file contains differences between "old" and "new" files. It is in binary format and
		is human-unreadable.

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

EXAMPLES
       Example #1

	      xdiff_file_rabdiff(3) example

	       The following code makes binary diff of two archives.

	      <?php
	      $old_version = 'my_script_1.0.tgz';
	      $new_version = 'my_script_1.1.tgz';

	      xdiff_file_rabdiff($old_version, $new_version, 'my_script.bdiff');
	      ?>

NOTES
       Note

	       Both files will be loaded into memory so ensure that your memory_limit is set high enough.

SEE ALSO
       xdiff_file_bpatch(3).

PHP Documentation Group 												     XDIFF_FILE_RABDIFF(3)