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  <refentry id="function.xdiff-file-diff-binary">
   <refnamediv>
    <refname>xdiff_file_diff_binary</refname>
    <refpurpose>
     Make binary diff of two files
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <methodsynopsis>
     <type>bool</type><methodname>xdiff_file_diff_binary</methodname>
     <methodparam><type>string</type><parameter>file1</parameter></methodparam>
     <methodparam><type>string</type><parameter>file2</parameter></methodparam>
     <methodparam><type>string</type><parameter>dest</parameter></methodparam>
    </methodsynopsis>
    <para>
     <function>xdiff_file_diff_binary</function> makes binary diff of files
     <parameter>file1</parameter> and <parameter>file2</parameter> and stores
     result in file <parameter>dest</parameter>. This function works with both text  
     and binary files. Resulting file is in binary format.
    </para>
    <note>
     <para>
      Both files will be loaded into memory so ensure that your memory_limit is set high enough.
     </para>
    </note>
    <para>
     &return.success;
    </para>
    <example>
     <title><function>xdiff_file_diff_binary</function> example</title>
     <para>
      The following code makes binary diff of two archives.
     </para>
     <programlisting role="php">
<![CDATA[
<?php
$old_version = 'my_script_1.0.tgz';
$new_version = 'my_script_1.1.tgz';

xdiff_file_diff_binary($old_version, $new_version, 'my_script.bdiff');
?>
]]>
     </programlisting>
    </example>
    <para>
     See also <function>xdiff_string_diff_binary</function>.
    </para>
   </refsect1>
  </refentry>

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