Wordpress: Full width template conditional helper

page-templates.php

<?php

/**
 * Helpers: Page Templates
 */

function dt_is_full_width_template($post_id) {

    if (!$post_id) {
        return false;
    }

    $wide_templates = [
        'templates/page-full-width.php',
    ];

    $post_type = get_post_type($post_id);

    if ($post_type == 'ei_location') {
        return true;
    }

    if (in_array($post_type, ['page', 'ei_seo_page'])) {
        $page_template_slug = get_page_template_slug($post_id);
        
        if (in_array($page_template_slug, $wide_templates)) {
            return true;
        }
    }

    return false;

}