wp cust post

add_action( 'init', 'testimonial' );

function testimonial() {
    register_post_type( 'testimonials',
        array(
            'labels' => array(
                'name' => 'testimonials',
                'singular_name' => 'testimonial',
                'add_new' => 'Add New',
                'add_new_item' => 'Add New testimonial',
                'edit' => 'Edit',
                'edit_item' => 'Edit testimonial',
                'new_item' => 'New testimonial',
                'view' => 'View',
                'view_item' => 'View new testimonial',
                'search_items' => 'Search testimonial',
                'not_found' => 'No testimonials found',
                'not_found_in_trash' => 'No testimonials in Trash',
                'parent' => 'Parent testimonial'
            ),

            'public' => true,
            'menu_position' => 16,
            'supports' => array( 'title', 'editor', 'comments', 'thumbnail' ),
            'taxonomies' => array( '' ),
            'menu_icon' => true,
            'has_archive' => true
        )
    );
}

//nampilin customnya
add_action( 'admin_init', 'testi' );
function testi() {
    add_meta_box( 'testimonial_meta_box',
        'testimonials Details',
        'display_testimonial_name_meta_box',
        'testimonials', 'normal', 'high'
    );
}

//formnya
function display_testimonial_name_meta_box( $testimonial ) {
    // Ambil harga
    $testimonial_name = esc_html( get_post_meta( $testimonial->ID, 'testimonial_name', true ) );

    echo    "<table>
            <tr>
                <td style='width: 100%'>Nama</td>
                <td><input type='text' size='80' name='post_testimonial_name' value='". $testimonial_name."' /></td>
            </tr>
            </table>";

}

//custom field ke database
add_action( 'save_post', 'add_testimonial_name_fields', 10, 2 );

//This function is executed when posts are saved or deleted from the admin panel
function add_testimonial_name_fields( $testimonial_id, $testimonial ) {
    // Check post type for post stuffs
    if ( $testimonial->post_type == 'testimonials' ) {
        // Store data in post meta table if present in post data
        if ( isset( $_POST['testimonial_name'] ) && $_POST['testimonial_name'] != '' ) {
            update_post_meta( $testimonial_id, 'testimonial_name', $_POST['testimonial_name'] );
        }
    }
}


//buat single post untuk ini
add_filter( 'template_include', 'laman_testi', 1 );
function laman_testi( $template_path ) {
    if ( get_post_type() == 'testimonials' ) {
        if ( is_single() ) {
            // checks if the file exists in the theme first,
            // otherwise serve the file from the plugin
            if ( $theme_file = locate_template( array ( 'single-testimonial.php' ) ) ) {
                $template_path = $theme_file;
            } else {
                $template_path = plugin_dir_path( __FILE__ ) . '/single-testimonial.php';
            }
        }
    }
    return $template_path;
}