wp_ajax_inline_save() WordPress Function

function wp_ajax_inline_save() {
	global $mode;

	check_ajax_referer( 'inlineeditnonce', '_inline_edit' );

	if ( ! isset( $_POST['post_ID'] ) || ! (int) $_POST['post_ID'] ) {
		wp_die();
	}

	$post_ID = (int) $_POST['post_ID'];

	if ( 'page' === $_POST['post_type'] ) {
		if ( ! current_user_can( 'edit_page', $post_ID ) ) {
			wp_die( __( 'Sorry, you are not allowed to edit this page.' ) );
		}
	} else {
		if ( ! current_user_can( 'edit_post', $post_ID ) ) {
			wp_die( __( 'Sorry, you are not allowed to edit this post.' ) );
		}
	}

	$last = wp_check_post_lock( $post_ID );
	if ( $last ) {
		$last_user      = get_userdata( $last );
		$last_user_name = $last_user ? $last_user->display_name : __( 'Someone' );

		/* translators: %s: User's display name. */
		$msg_template = __( 'Saving is disabled: %s is currently editing this post.' );

		if ( 'page' === $_POST['post_type'] ) {
			/* translators: %s: User's display name. */
			$msg_template = __( 'Saving is disabled: %s is currently editing this page.' );
		}

		printf( $msg_template, esc_html( $last_user_name ) );
		wp_die();
	}

	$data = &$_POST;

	$post = get_post( $post_ID, ARRAY_A );

	// Since it's coming from the database.
	$post = wp_slash( $post );

	$data['content'] = $post['post_content'];
	$data['excerpt'] = $post['post_excerpt'];

	// Rename.
	$data['user_ID'] = get_current_user_id();

	if ( isset( $data['post_parent'] ) ) {
		$data['parent_id'] = $data['post_parent'];
	}

	// Status.
	if ( isset( $data['keep_private'] ) && 'private' === $data['keep_private'] ) {
		$data['visibility']  = 'private';
		$data['post_status'] = 'private';
	} else {
		$data['post_status'] = $data['_status'];
	}

	if ( empty( $data['comment_status'] ) ) {
		$data['comment_status'] = 'closed';
	}

	if ( empty( $data['ping_status'] ) ) {
		$data['ping_status'] = 'closed';
	}

	// Exclude terms from taxonomies that are not supposed to appear in Quick Edit.
	if ( ! empty( $data['tax_input'] ) ) {
		foreach ( $data['tax_input'] as $taxonomy => $terms ) {
			$tax_object = get_taxonomy( $taxonomy );
			/** This filter is documented in wp-admin/includes/class-wp-posts-list-table.php */
			if ( ! apply_filters( 'quick_edit_show_taxonomy', $tax_object->show_in_quick_edit, $taxonomy, $post['post_type'] ) ) {
				unset( $data['tax_input'][ $taxonomy ] );
			}
		}
	}

	// Hack: wp_unique_post_slug() doesn't work for drafts, so we will fake that our post is published.
	if ( ! empty( $data['post_name'] ) && in_array( $post['post_status'], array( 'draft', 'pending' ), true ) ) {
		$post['post_status'] = 'publish';
		$data['post_name']   = wp_unique_post_slug( $data['post_name'], $post['ID'], $post['post_status'], $post['post_type'], $post['post_parent'] );
	}

	// Update the post.
	edit_post();

	$wp_list_table = _get_list_table( 'WP_Posts_List_Table', array( 'screen' => $_POST['screen'] ) );

	$mode = 'excerpt' === $_POST['post_view'] ? 'excerpt' : 'list';

	$level = 0;
	if ( is_post_type_hierarchical( $wp_list_table->screen->post_type ) ) {
		$request_post = array( get_post( $_POST['post_ID'] ) );
		$parent       = $request_post[0]->post_parent;

		while ( $parent > 0 ) {
			$parent_post = get_post( $parent );
			$parent      = $parent_post->post_parent;
			$level++;
		}
	}

	$wp_list_table->display_rows( array( get_post( $_POST['post_ID'] ) ), $level );

	wp_die();
}