Wordpress functions not working with PHPStorm

There is an issue with PHPStorm where it fails to recognize WordPress functions within my WordPress site. I had WordPress core properly included in my website and ensured correct file paths, PHPStorm's code completion feature does not provide suggestions for WordPress-specific functions, making development very challenging. 

For example, with get_permalink() or wp_query() when typing code within WordPress project files. This lack of code completion hinders productivity and increases the likelihood of manual errors while coding.

<?php

// Example of PHPStorm not recognizing WordPress functions
// PHPStorm does not suggest WordPress functions like get_permalink() or wp_query()
$args = array(
   'post_type' => 'post',
   'posts_per_page' => 5,
);

$query = new WP_Query($args); // PHPStorm does not provide suggestions here

?>