get_compat_media_markup( int $attachment_id, array $args = null )

function get_compat_media_markup( $attachment_id, $args = null ) {
	$post = get_post( $attachment_id );

	$default_args = array(
		'errors' => null,
		'in_modal' => false,
	);

	$user_can_edit = current_user_can( 'edit_post', $attachment_id );

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

	/** This filter is documented in wp-admin/includes/media.php */
	$args = apply_filters( 'get_media_item_args', $args );

	$form_fields = array();

	if ( $args['in_modal'] ) {
		foreach ( get_attachment_taxonomies($post) as $taxonomy ) {
			$t = (array) get_taxonomy($taxonomy);
			if ( ! $t['public'] || ! $t['show_ui'] )
				continue;
			if ( empty($t['label']) )
				$t['label'] = $taxonomy;
			if ( empty($t['args']) )
				$t['args'] = array();

			$terms = get_object_term_cache($post->ID, $taxonomy);
			if ( false === $terms )
				$terms = wp_get_object_terms($post->ID, $taxonomy, $t['args']);

			$values = array();

			foreach ( $terms as $term )
				$values[] = $term->slug;
			$t['value'] = join(', ', $values);
			$t['taxonomy'] = true;

			$form_fields[$taxonomy] = $t;
		}
	}

	// Merge default fields with their errors, so any key passed with the error (e.g. 'error', 'helps', 'value') will replace the default
	// The recursive merge is easily traversed with array casting: foreach ( (array) $things as $thing )
	$form_fields = array_merge_recursive($form_fields, (array) $args['errors'] );

	/** This filter is documented in wp-admin/includes/media.php */
	$form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post );

	unset( $form_fields['image-size'], $form_fields['align'], $form_fields['image_alt'],
		$form_fields['post_title'], $form_fields['post_excerpt'], $form_fields['post_content'],
		$form_fields['url'], $form_fields['menu_order'], $form_fields['image_url'] );

	/** This filter is documented in wp-admin/includes/media.php */
	$media_meta = apply_filters( 'media_meta', '', $post );

	$defaults = array(
		'input'         => 'text',
		'required'      => false,
		'value'         => '',
		'extra_rows'    => array(),
		'show_in_edit'  => true,
		'show_in_modal' => true,
	);

	$hidden_fields = array();

	$item = '';
	foreach ( $form_fields as $id => $field ) {
		if ( $id[0] == '_' )
			continue;

		$name = "attachments[$attachment_id][$id]";
		$id_attr = "attachments-$attachment_id-$id";

		if ( !empty( $field['tr'] ) ) {
			$item .= $field['tr'];
			continue;
		}

		$field = array_merge( $defaults, $field );

		if ( ( ! $field['show_in_edit'] && ! $args['in_modal'] ) || ( ! $field['show_in_modal'] && $args['in_modal'] ) )
			continue;

		if ( $field['input'] == 'hidden' ) {
			$hidden_fields[$name] = $field['value'];
			continue;
		}

		$readonly      = ! $user_can_edit && ! empty( $field['taxonomy'] ) ? " readonly='readonly' " : '';
		$required      = $field['required'] ? '<span class="required">*</span>' : '';
		$required_attr = $field['required'] ? ' required' : '';
		$aria_required = $field['required'] ? " aria-required='true'" : '';
		$class  = 'compat-field-' . $id;
		$class .= $field['required'] ? ' form-required' : '';

		$item .= "\t\t<tr class='$class'>";
		$item .= "\t\t\t<th scope='row' class='label'><label for='$id_attr'><span class='alignleft'>{$field['label']}</span>$required<br class='clear' /></label>";
		$item .= "</th>\n\t\t\t<td class='field'>";

		if ( !empty( $field[ $field['input'] ] ) )
			$item .= $field[ $field['input'] ];
		elseif ( $field['input'] == 'textarea' ) {
			if ( 'post_content' == $id && user_can_richedit() ) {
				// sanitize_post() skips the post_content when user_can_richedit.
				$field['value'] = htmlspecialchars( $field['value'], ENT_QUOTES );
			}
			$item .= "<textarea id='$id_attr' name='$name'{$required_attr}{$aria_required}>" . $field['value'] . '</textarea>';
		} else {
			$item .= "<input type='text' class='text' id='$id_attr' name='$name' value='" . esc_attr( $field['value'] ) . "' $readonly{$required_attr}{$aria_required} />";
		}
		if ( !empty( $field['helps'] ) )
			$item .= "<p class='help'>" . join( "</p>\n<p class='help'>", array_unique( (array) $field['helps'] ) ) . '</p>';
		$item .= "</td>\n\t\t</tr>\n";

		$extra_rows = array();

		if ( !empty( $field['errors'] ) )
			foreach ( array_unique( (array) $field['errors'] ) as $error )
				$extra_rows['error'][] = $error;

		if ( !empty( $field['extra_rows'] ) )
			foreach ( $field['extra_rows'] as $class => $rows )
				foreach ( (array) $rows as $html )
					$extra_rows[$class][] = $html;

		foreach ( $extra_rows as $class => $rows )
			foreach ( $rows as $html )
				$item .= "\t\t<tr><td></td><td class='$class'>$html</td></tr>\n";
	}

	if ( !empty( $form_fields['_final'] ) )
		$item .= "\t\t<tr class='final'><td colspan='2'>{$form_fields['_final']}</td></tr>\n";

	if ( $item ) {
		$item = '<p class="media-types media-types-required-info">' .
			sprintf( __( 'Required fields are marked %s' ), '<span class="required">*</span>' ) . '</p>
			<table class="compat-attachment-fields">' . $item . '</table>';
	}

	foreach ( $hidden_fields as $hidden_field => $value ) {
		$item .= '<input type="hidden" name="' . esc_attr( $hidden_field ) . '" value="' . esc_attr( $value ) . '" />' . "\n";
	}

	if ( $item )
		$item = '<input type="hidden" name="attachments[' . $attachment_id . '][menu_order]" value="' . esc_attr( $post->menu_order ) . '" />' . $item;

	return array(
		'item'   => $item,
		'meta'   => $media_meta,
	);
}