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Description

Generates the WXR export file for download.

Default behavior is to export all content, however, note that post content will only be exported for post types with the can_export argument enabled. Any posts with the 'auto-draft' status will be skipped.

Usage

export_wp( $args );

Parameters

$args

( array ) optional – { Optional. Arguments for generating the WXR export file for download. Default empty array.

$content

( string ) optional – Type of content to export. If set, only the post content of this post type will be exported. Accepts 'all', 'post', 'page', 'attachment', or a defined custom post. If an invalid custom post type is supplied, every post type for which can_export is enabled will be exported instead. If a valid custom post type is supplied but can_export is disabled, then 'posts' will be exported instead. When 'all' is supplied, only post types with can_export enabled will be exported. Default 'all'.

$author

( string ) optional – Author to export content for. Only used when $content is 'post', 'page', or 'attachment'. Accepts false (all) or a specific author ID. Default false (all).

$category

( string ) optional – Category (slug) to export content for. Used only when $content is 'post'. If set, only post content assigned to $category will be exported. Accepts false or a specific category slug. Default is false (all categories).

$start_date

( string ) optional – Start date to export content from. Expected date format is 'Y-m-d'. Used only when $content is 'post', 'page' or 'attachment'. Default false (since the beginning of time).

$end_date

( string ) optional – End date to export content to. Expected date format is 'Y-m-d'. Used only when $content is 'post', 'page' or 'attachment'. Default false (latest publish date).

$status

( string ) optional – Post status to export posts for. Used only when $content is 'post' or 'page'. Accepts false (all statuses except 'auto-draft'), or a specific status, i.e. 'publish', 'pending', 'draft', 'auto-draft', 'future', 'private', 'inherit', or 'trash'. Default false (all statuses except 'auto-draft'). }

Returns

void

Source

File name: wordpress/wp-admin/includes/export.php
Lines:

function export_wp( $args = array() ) {
  global $wpdb, $post;

  $defaults = array(
    'content'    => 'all',
    'author'     => false,
    'category'   => false,
    'start_date' => false,
    'end_date'   => false,
    'status'     => false,
  );
  $args     = wp_parse_args( $args, $defaults );

  
/**
 * Fires at the beginning of an export, before any headers are sent.
 *
 * @since 2.3.0
 *
 * @param array $args An array of export arguments.
 */
  do_action( 'export_wp', $args );

  $sitename = sanitize_key( get_bloginfo( 'name' ) );
  if ( ! empty( $sitename ) ) {
    $sitename .= '.';
  }
  $date        = gmdate( 'Y-m-d' );
  $wp_filename = $sitename . 'WordPress.' . $date . '.xml';
  
/**
 * 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 );

  header( 'Content-Description: File Transfer' );
  header( 'Content-Disposition: attachment; filename=' . $filename );
  header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ), true );

  if ( 'all' !== $args['content'] && post_type_exists( $args['content'] ) ) {
    $ptype = get_post_type_object( $args['content'] );
    if ( ! $ptype->can_export ) {
      $args['content'] = 'post';
    }

    $where = $wpdb->prepare( "{$wpdb->posts}.post_type = %s", $args['content'] );
  } else {
    $post_types = get_post_types( array( 'can_export' => true ) );
    $esses      = array_fill( 0, count( $post_types ), '%s' );

    // phpcs:ignore WordPress.DB.PreparedSQLPlaceholders.UnfinishedPrepare
    $where = $wpdb->prepare( "{$wpdb->posts}.post_type IN (" . implode( ',', $esses ) . ')', $post_types );
  }

  if ( $args['status'] && ( 'post' === $args['content'] || 'page' === $args['content'] ) ) {
    $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_status = %s", $args['status'] );
  } else {
    $where .= " AND {$wpdb->posts}.post_status != 'auto-draft'";
  }

  $join = '';
  if ( $args['category'] && 'post' === $args['content'] ) {
    $term = term_exists( $args['category'], 'category' );
    if ( $term ) {
      $join   = "INNER JOIN {$wpdb->term_relationships} ON ({$wpdb->posts}.ID = {$wpdb->term_relationships}.object_id)";
      $where .= $wpdb->prepare( " AND {$wpdb->term_relationships}.term_taxonomy_id = %d", $term['term_taxonomy_id'] );
    }
  }

  if ( in_array( $args['content'], array( 'post', 'page', 'attachment' ), true ) ) {
    if ( $args['author'] ) {
      $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_author = %d", $args['author'] );
    }

    if ( $args['start_date'] ) {
      $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date >= %s", gmdate( 'Y-m-d', strtotime( $args['start_date'] ) ) );
    }

    if ( $args['end_date'] ) {
      $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date < %s", gmdate( 'Y-m-d', strtotime( '+1 month', strtotime( $args['end_date'] ) ) ) );
    }
  }

  // Grab a snapshot of post IDs, just in case it changes during the export.
  $post_ids = $wpdb->get_col( "SELECT ID FROM {$wpdb->posts} $join WHERE $where" );

  /*
	 * Get the requested terms ready, empty unless posts filtered by category
	 * or all content.
	 */
  $cats  = array();
  $tags  = array();
  $terms = array();
  if ( isset( $term ) && $term ) {
    $cat  = get_term( $term['term_id'], 'category' );
    $cats = array( $cat->term_id => $cat );
 

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