[WordPress] Function to get an array with all posts from specific post type

wp-get-posts-array.php

<?php
/**
 * Get an array with all posts from specific post type
 *
 * @param string $post_type retrieves posts by Post Types
 *
 * @return array with post ID as a key and post title as a value
 */

function get_posts_array( $post_type = 'post' ) {

	global $post;
	$posts_array = array();
	$posts       = get_posts( array(
		'post_type'      => $post_type,
		'posts_per_page' => - 1
	) );

	foreach ( $posts as $post ) : setup_postdata( $post );
		$posts_array[ get_the_ID() ] = get_the_title();
	endforeach;
	wp_reset_postdata();

	return $posts_array;

}