WordPress : Load a template part into a template and pass scoped variables

wp-get_template_view

<?php

/**
 * Load a template part into a template
 *
 * Makes it easy for a theme to reuse sections of code in a easy to overload way
 * for child themes.
 *
 * Includes the named template part for a theme or if a name is specified then a
 * specialised part will be included. If the theme contains no {slug}.php file
 * then no template will be included.
 *
 * The template is included using require, not require_once, so you may include the
 * same template part multiple times.
 *
 * For the $name parameter, if the file is called "{slug}-special.php" then specify
 * "special".
 *
 * For the $data parameter represents variables to be passed to the view
 * without having to rely on the global scope.
 *
 * @link https://core.trac.wordpress.org/ticket/21673
 *
 * @param  mixed|string  $slug  The slug name for the generic template.
 * @param  string        $name  The name of the specialised template.
 * @param  array         $data  Variables to be pass along to the specialized template.
 */

function get_template_view( $slug, $name = null, $data = [] )
{
	$defaults = [
		'slug' => '',
		'name' => null,
		'data' => []
	];

	$args = null;

	$params = func_get_args();

	foreach ( $params as $param => $value ) {
		if ( is_array( $value ) && isset( $value['slug'] ) ) {
			$args = $value;
			break;
		}
	}

	if ( is_null( $args ) && is_string( func_get_arg( 0 ) ) ) {
		$args = $params;
	}
	else {
		return false;
	}

	$args = wp_parse_args( $args, $defaults );

	extract( $args, EXTR_SKIP, '__' );

	unset( $args, $params );

	/**
	 * Fires before the specified template part file is loaded.
	 *
	 * The dynamic portion of the hook name, `$slug`, refers to the slug name
	 * for the generic template part.
	 *
	 * @since 3.0.0
	 *
	 * @param string $__slug The slug name for the generic template.
	 * @param string $__name The name of the specialized template.
	 * @param array  $__data Variables to be pass along to the specialized template.
	 */
	do_action( "get_template_part_{$__slug}", $__slug, $__name, $__data );

	$__templates = [];
	$__name = (string) $__name;
	if ( '' !== $__name ) {
		$__templates[] = "{$__slug}-{$__name}.php";
	}

	$__templates[] = "{$__slug}.php";

	$__template_name = locate_template( $__templates, false, false );

	if ( '' != $__template_name ) {
		unset( $__templates, $__slug, $__name );

		if ( ! empty( $__data ) && is_array( $__data ) ) {
			extract( $__data, EXTR_SKIP );
		}

		include( $__template_name );
	}
}