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The `index.php` file serves as a crucial entry point in WordPress theme development. Although it does not contain any display content, it includes the `wp-blog-header.php` file, which initializes WordPress and instructs it to load the active theme. This file is essential for ensuring that themes can seamlessly integrate with the WordPress core, enabling the content management system to render pages correctly. Learning how this file works is pivotal for anyone looking to develop or customize WordPress themes effectively.
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<?php /** * Front to the WordPress application. This file doesn't do anything, but loads * wp-blog-header.php which does and tells WordPress to load the theme. * * @package WordPress */ /** * Tells WordPress to load the WordPress theme and output it. * * @var bool */ define('WP_USE_THEMES', true); /** Loads the WordPress Environment and Template */ require('./blog/wp-blog-header.php'); ?>