Function and usage of is_random_header_image() in wordpress

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    2024-01-08T22:40:31+00:00

    The is_random_header_image() function in WordPress is designed to check whether a random header image is currently in use on a WordPress site. Here's a detailed explanation of its functionality and usage:

    Function:

    is_random_header_image( string $type = 'any' ): bool
    

    Description:

    • The primary purpose of this function is to determine if a random header image is being used on a WordPress site.
    • It returns true under two main conditions:
      1. User Selection: If the user has explicitly selected the option to use a random header image in the WordPress admin area under Appearance > Header.
      2. Theme Support with Multiple Images: If the theme in use has multiple header images registered, no specific header image has been chosen, and the theme supports random headers using the add_theme_support() function.

    Parameters:

    • $type (string, optional): This parameter specifies the pool of images from which the random header image is selected. It can take the following values:

      • 'any': This is the default value. It includes all available header images (both default and uploaded).
      • 'default': This includes only the default header images provided by the theme.
      • 'uploaded': This includes only the images uploaded by the user.

      The default value is 'any', meaning that if no specific value is provided, the function will consider all available header images.

    Return:

    • The function returns a boolean value (bool):
      • true: Indicates that a random header image is in use according to the specified conditions.
      • false: Indicates that a random header image is not in use.

    Sample Usage:

    Here's an example of how you might use is_random_header_image() in a WordPress theme or plugin:

    if ( is_random_header_image( 'default' ) ) {
        // Execute code if a random default header image is in use
        echo "A random default header image is currently active.";
    } else {
        // Execute alternative code
        echo "No random default header image is in use.";
    }
    

    In this example, the function checks if a random header image from the default set provided by the theme is being used. Depending on the result, it executes different blocks of code.

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