After getting incredibly frustrated with the included get_template_part function in Wordpress, I decided to write my own that makes getting templates much easier. This function allows you to omit the '.php' extension, and also pass down data to the included file. You can just add this anywhere in your `functions.php` file, or anywhere else that …

better_get_template_part.php

<?php 

if (! function_exists('better_get_template_part') {
    
    /**
     * A better way of getting a Wordpress Template Part. 
     * This function allows you to to omit the '.php' extension, and also pass 
     * data to the included file. 
     * 
     * The data in the array is extracted into variables for use on the 
     * template directly. 
     *
     * @param string $filename Path to file, starting from '/template-parts'
     * @param array $data Data to be included in the template
     * @param boolean $includeOnce Only include the template once. Defaults to false
     * @return void
     */
    function better_get_template_part($filename, array $data = [], $includeOnce = false)
    {
        $name = str_replace('_', '-', $filename);
        $templateURL = get_template_directory() . '/template-parts';
        $fullURL = $templateURL . $name;
        $pathinfo = pathinfo($fullURL);

        if (!isset($pathinfo['extension'])) {
            $fullURL .= '.php';
        }

        if (!file_exists($fullURL)) {
            return false;
        }

        extract($data);

        if ($includeOnce) {
            include_once($fullURL);
        } else {
            include($fullURL);
        }
    }

}