Convert into Utility File – for Reuse

The code that we’ve built is a utility file. But for it to be reusable, we need to do the following:

1. Remove the enqueueing callback and put that into a separate file.
2. Protect the utility functions from loading into memory if they’ve already been loaded by another plugin/theme.

In this episode, we’ll do some refactoring and housekeeping. But you also get to learn about this design pattern and why it is so critical in our strategy:

if ( ! function_exists( 'get_theme_version' ) ) :
	/**
	 * Get the theme's version.
	 *
	 * When in development/mode mode, it uses the style.css modification time.
	 * Else, it grabs the version number from the stylesheet.
	 *
	 * @since 1.0.0
	 *
	 * @return string|int
	 */
	function get_theme_version() {
		// code deleted for brevity
	}
endif;

In this episode, you’ll refactored in the Twenty Seventeen and Genesis Sample themes. Plus, we’ll demonstrate including our new utility file into a plugin and theme at the same time.

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