I have no working code example for this, so I'm hoping to not get blasted for an an inappropriate question...

Being able to add append a timestamp to WP xml exports (WXR) would be useful.

I assume it's possible, so where might I begin?

I want to get the datestamp that forms part of the filename to also include the time (rather than just the year/month/day).

  • Do you mean a timestamp in the filename created, or a timestamp within the xml structure itself? – C C Oct 22 '16 at 15:37
  • @C C Thanks... Sorry, poorly worded question - now updated for clarity. – glvr Oct 22 '16 at 19:13

I don't think you need to do that, it's already there (if I understand the question correctly):

  • In the WXR file we get a timestamp like:

    that's generated with:

    <?php the_generator( 'export' ); ?>

    that calls get_the_generator() where the export case is:

    $gen = '<!-- generator="WordPress/' . get_bloginfo_rss('version') 
        . '" created="'. date('Y-m-d H:i') . '" -->';

    It's possible to modify it or append to it via the get_the_generator_export filter.

  • Additionally the timestamp is added to the xml document with:

        <pubDate><?php echo date( 'D, d M Y H:i:s +0000' ); ?></pubDate>
  • The generated export filename also contains a datestamp:

    $wp_filename = $sitename . 'wordpress.' . $date . '.xml';


To modify the exported filename, one can use this filter:

 * Filters the export filename.
 * @since 4.4.0
 * @param string $wp_filename The name of the file for download.
 * @param string $sitename    The site name.
 * @param string $date        Today's date, formatted.
 $filename = apply_filters( 'export_wp_filename', $wp_filename, $sitename, $date );


Here we add the \TH-i-s part to the filename:

add_filter( 'export_wp_filename', function( $wp_filename, $sitename, $date )
    return sprintf( 
        date( 'Y-m-d\TH-i-s' )

}, 10, 3 ); 

This will generate a filename like:


This will avoid a possible confusing download series like this one:

sitename.wordpress.2016-10-22 (1).xml
sitename.wordpress.2016-10-22 (2).xml
sitename.wordpress.2016-10-22 (3).xml

Hope you can adjust this to your needs!

  • thanks. Sorry, poorly worded question - now updated for clarity. – glvr Oct 22 '16 at 19:13
  • I updated the answer @gulliver – birgire Oct 22 '16 at 19:26
  • Thanks. Appreciated. It improves the default WP timestamp, by providing immediate visual info on time-of-creation. Better than my previous situation of confusion when multiple exports are done on the same day. – glvr Oct 23 '16 at 7:17
  • I agree with you, that it's annoying to have the sitename.wordpress.2016-10-22.xml and then sitename.wordpress.2016-10-22 (1).xml and sitename.wordpress.2016-10-22(2).xml etc for downloads the same day @gulliver – birgire Oct 23 '16 at 8:59

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