Function and usage of print_column_headers() in wordpress

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    2024-01-08T13:02:29+00:00

    The print_column_headers() function in WordPress is used to print column headers for a specific admin screen. This function is particularly useful when you're developing custom admin pages or customizing existing admin tables in WordPress. Here's a detailed explanation of its function and parameters:

    Function:

    • Name: print_column_headers()
    • Purpose: Prints column headers for a particular screen (admin page) in WordPress.

    Parameters:

    1. $screen (string | WP_Screen) [required]:
      • Type: It can be either a string or a WP_Screen object.
      • Description: This parameter represents the screen for which you want to print the column headers. The screen can be specified either by its hook name (as a string) or by passing a WP_Screen object. The hook name usually corresponds to the slug of the admin page.
    2. $with_id (bool) [optional]:
      • Type: Boolean.
      • Default Value: true.
      • Description: This parameter determines whether the ID attribute should be set for the column headers. If set to true, the function will include IDs in the column headers, which can be useful for styling or scripting purposes.

    Sample Usage:

    Here's a basic example of how print_column_headers() might be used in a WordPress plugin or theme:

    // Assuming you're in the context of an admin page
    
    // Screen identifier, for example, 'edit-post' for the Posts list table
    $screen_id = 'edit-post';
    
    // Call the function to print column headers for the specified screen
    print_column_headers($screen_id);
    

    In this example, print_column_headers() is called with the screen identifier for the Posts list table in the WordPress admin. This would print the column headers (like 'Title', 'Author', 'Date', etc.) for the Posts list table. The $with_id parameter is not specified, so it defaults to true, meaning the printed headers will have ID attributes.

    Note:

    • print_column_headers() is typically used within the context of WordPress admin pages, especially when working with list tables.
    • Understanding the screen hook names and WordPress's list table API is essential to effectively use this function.

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