Custom Field Plugin

I wrote a custom plugin for custom post fields, but I am lost when trying to do an attachment field. I got it to work and as an input type file, but I want the user as soon as they hit the the browse button I want them to either search wordpress media or upload.

Below is my code

‘
<?php
/*
Plugin Name: Movie Reviews
Plugin URI: https://wp.tutsplus.com/
Description: Declares a plugin that will create a custom post type
Version: 1.0
Author: Soumitra Chakraborty
Author URI: https://wp.tutsplus.com/
License: GPLv2
*/

add_action( ‘init’, ‘create_movie_review’ );

function create_movie_review() {
register_post_type( ‘movie_reviews’,
array(
‘labels’ => array(
‘name’ => ‘Movie Reviews’,
‘singular_name’ => ‘Movie Review’,
‘add_new’ => ‘Add New’,
‘add_new_item’ => ‘Add New Movie Review’,
‘edit’ => ‘Edit’,
‘edit_item’ => ‘Edit Movie Review’,
‘new_item’ => ‘New Movie Review’,
‘view’ => ‘View’,
‘view_item’ => ‘View Movie Review’,
‘search_items’ => ‘Search Movie Reviews’,
‘not_found’ => ‘No Movie Reviews found’,
‘not_found_in_trash’ => ‘No Movie Reviews found in Trash’,
‘parent’ => ‘Parent Movie Review’
),

‘public’ => true,
‘menu_position’ => 15,
‘supports’ => array( ‘title’, ‘editor’, ‘comments’, ‘thumbnail’, ‘custom-fields’ ),
‘taxonomies’ => array( ” ),
‘menu_icon’ => plugins_url( ‘images/image.png’, __FILE__ ),
‘has_archive’ => true
)
);
}

add_action( ‘admin_init’, ‘my_admin’ );

function my_admin() {
add_meta_box( ‘movie_review_meta_box’,
‘Movie Review Details’,
‘display_movie_review_meta_box’,
‘movie_reviews’, ‘normal’, ‘high’
);
}

function display_movie_review_meta_box( $movie_review ) {
// Retrieve current name of the Director and Movie Rating based on review ID
$movie_director = esc_html( get_post_meta( $movie_review->ID, ‘movie_director’, true ) );
$movie_attachment = esc_html( get_post_meta( $movie_review->ID, ‘movie_attachment’, true ) );
$movie_rating = intval( get_post_meta( $movie_review->ID, ‘movie_rating’, true ) );
?>
<table>
<tr>
<td style=”width: 100%”>Movie Director</td>
<td><input type=”text” size=”80″ name=”movie_review_director_name” value=”<?php echo $movie_director; ?>” /></td>
</tr>
<tr>
<td style=”width: 100%”>Movie Attachment</td>
<td><input type=”file” name=”movie_review_attachment_name” value=”<?php echo $movie_attachment; ?>” /></td>
</tr>
<tr>
<td style=”width: 150px”>Movie Rating</td>
<td>
<select style=”width: 100px” name=”movie_review_rating”>
<?php
// Generate all items of drop-down list
for ( $rating = 5; $rating >= 1; $rating — ) {
?>
<option value=”<?php echo $rating; ?>” <?php echo selected( $rating, $movie_rating ); ?>>
<?php echo $rating; ?> stars <?php } ?>
</select>
</td>
</tr>
</table>
<?php
}

add_action( ‘save_post’, ‘add_movie_review_fields’, 10, 2 );

function add_movie_review_fields( $movie_review_id, $movie_review ) {
// Check post type for movie reviews
if ( $movie_review->post_type == ‘movie_reviews’ ) {
// Store data in post meta table if present in post data
if ( isset( $_POST[‘movie_review_director_name’] ) && $_POST[‘movie_review_director_name’] != ” ) {
update_post_meta( $movie_review_id, ‘movie_director’, $_POST[‘movie_review_director_name’] );
}
if ( isset( $_POST[‘movie_review_attachment_name’] ) && $_POST[‘movie_review_attachment_name’] != ” ) {
update_post_meta( $movie_review_id, ‘movie_attachment’, $_POST[‘movie_review_attachment_name’] );
}
if ( isset( $_POST[‘movie_review_rating’] ) && $_POST[‘movie_review_rating’] != ” ) {
update_post_meta( $movie_review_id, ‘movie_rating’, $_POST[‘movie_review_rating’] );
}
}
}

add_filter( ‘template_include’, ‘include_template_function’, 1 );

function include_template_function( $template_path ) {
if ( get_post_type() == ‘movie_reviews’ ) {
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-movie_reviews.php’ ) ) ) {
$template_path = $theme_file;
} else {
$template_path = plugin_dir_path( __FILE__ ) . ‘/single-movie_reviews.php’;
}
}
}
return $template_path;
}

?>
‘