Function and usage of export_wp() in wordpress

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    2024-01-06T02:35:49+00:00

    The export_wp() function in WordPress is a powerful tool designed to generate a WordPress eXtended RSS (WXR) export file for download. This file format is commonly used for transferring content between WordPress sites. Here's a detailed breakdown of the function and its usage:

    Function:

    export_wp( array $args = array() )

    Description:

    • Primary Functionality: Generates a WXR export file, which is typically used for backing up or transferring content from a WordPress site to another.
    • Default Behavior: Exports all content by default. However, it only exports post content for post types where the can_export argument is set to true.
    • Exclusion of Auto-Drafts: Posts with the status 'auto-draft' are not included in the export.

    Parameters:

    • $args (array, optional):
      • This parameter allows customization of what gets exported. It's an associative array where each key represents a specific argument for export customization.

    Key Arguments within $args:

    1. content (string):

      • Specifies the type of content to export.
      • Acceptable values include 'all', 'post', 'page', 'attachment', or a custom post type.
      • Defaults to 'all', meaning it exports all content types with can_export enabled.
      • If an invalid custom post type is given, all exportable post types are included.
      • If a valid custom post type is given but can_export is disabled for it, then 'posts' will be exported as a fallback.
    2. author (string):

      • Filters the content to export by author.
      • Used only for 'post', 'page', or 'attachment'.
      • Can be set to false (all authors) or a specific author ID.
      • Defaults to false.
    3. category (string):

      • Filters the content to export by category.
      • Applicable only when exporting 'post'.
      • Can be set to a specific category slug or false for all categories.
      • Defaults to false.
    4. start_date (string):

      • Sets the starting date for content to export.
      • Format: 'Y-m-d'.
      • Applicable for 'post', 'page', or 'attachment'.
      • Defaults to false, indicating no start date limit.
    5. end_date (string):

      • Sets the end date for content to export.
      • Format: 'Y-m-d'.
      • Applicable for 'post', 'page', or 'attachment'.
      • Defaults to false, indicating no end date limit.
    6. status (string):

      • Specifies the post status to filter the export.
      • Applicable for 'post' and 'page'.
      • Can be a specific status ('publish', 'pending', etc.) or false for all statuses (excluding 'auto-draft').
      • Defaults to false.

    Default Value:

    • array(): When called without any arguments, export_wp() exports all content, except for auto-drafts, for post types where can_export is enabled.

    Sample Usage:

    // Export all posts from a specific author and category within a date range
    $args = array(
        'content'   => 'post',
        'author'    => '123', // Specific author ID
        'category'  => 'news', // Specific category slug
        'start_date'=> '2023-01-01',
        'end_date'  => '2023-12-31'
    );
    
    export_wp( $args );
    

    This sample code will generate a WXR file containing all posts written by the author with ID 123, in the 'news' category, from January 1, 2023, to December 31, 2023.

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