In-depth parsing of the get_template_part function for loading templates in WordPress, wordpresstemplate_PHP tutorial

In-depth parsing of the get_template_part function for loading templates in WordPress, wordpresstemplate. In-depth analysis of the get_template_part function for loading templates in WordPress. wordpresstemplate recently studied the official topic TwentyEleven. there are some items that are not easy to find on the internet. in the in-depth analysis of WordPress, the get_template_part function for loading the template

Twenty Eleven, an official topic of recent research, is hard to find some of the available Chinese documents on the internet. it can be recorded in a blog as a shared and memo, after wordpress 3.0, the get_template_part () function is available. it should be a new function that provides more diverse options for the article presentation form.

The instance in Twenty Eleven is as follows:

Twenty Eleven index. php file
Row: 21

<? Php if (have_posts ():?> <? Php twentyeleven_content_nav ('Nav-above');?> <? Php/* Start the Loop to call different types of articles in a Loop */?> <? Php while (have_posts (): the_post ();?> <? Php get_template_part ('content', get_post_format ();?> <? Php endwhile;?> ............................ <? Php endif;?>

Description:
Load a specified template to another template (different from header, sidebar, footer ).
Makes it easy to reuse code segments using subtemplates for a topic.

Used to include the specified template file in the template. you only need to specify the slug and name parameters to include the File {slug}-{name }. php, the most important function is to include {name} without this file. php file

Usage:

<?php get_template_part( $slug, $name ) ?>

Parameters:

• $ Slug (required) common Template name
• $ Name (optional) Template name

Example:

Use loop. php in subtopics

Assume that the parent topic in the wp-content/themes folder is twentyten subtopic twentytenchild. the following code is used:

<?php get_template_part( 'loop', 'index' ); ?>

Php's require () function will include files at the following priority

1. wp-content/themes/twentytenchild/loop-index.php
2. wp-content/themes/twentytenchild/loop. php
3. wp-content/themes/twentyten/loop-index.php
4. wp-content/themes/twentyten/loop. php

Navigation (this is a bad example, but it is another way of thinking)
Use the general nav. php file to add a navigation bar to the topic:

<?php get_template_part( 'nav' );      // Navigation bar (nav.php) ?><?php get_template_part( 'nav', '2' );   // Navigation bar #2 (nav-2.php) ?><?php get_template_part( 'nav', 'single' ); // Navigation bar to use in single pages (nav-single.php) ?>

Get_template_part () hook details
Because the get_template_part () function is widely used in the official theme (Twenty Eleven), this function is a popular function, I have written an article about the specific usage of the function, so it is inconvenient to repeat it here. this article mainly discusses the hook $ tag value in add_action of the function, because, there are always some functions in WP hook that are confusing in the $ tag value.

Differences from common hooks
The $ tag of a common hook is a fixed value, while get_template_part () is indeed a variable value. well, let's not talk about it. how much trouble does wp bring us to implement a simple function, however, this setting does bring a lot of convenience to various theme implementations.
The source code for implementing this principle is as follows, which is truncated from the WordPress source code.

Function get_template_part ($ slug, $ name = null) {// $ tag = "get_template_part _ {$ slug}" // that is, get_template_part _ + do_action ("get_template_part _ {$ slug}", $ slug, $ name); $ templates = array (); if (isset ($ name) $ templates [] = "{$ slug}-{$ name }. php "; $ templates [] =" {$ slug }. php "; locate_template ($ templates, true, false );}

Instance
As mentioned above, it may be a bit hard to understand.

// Review the usage of get_template_part ($ slug, $ name). // If you use get_template_part ('index', 'Photo ') in the topic '); // then WP will go to the index-photo.php file under the topic Root Directory // then if we want to hang a function, it will be like the following function addFunction ($ slug, $ name) {echo $ slug ;} add_action ("get_template_part_index", "addFunction", 10, 2 );

Detailed description of the get_template_part () function

Articles you may be interested in:

• Detailed description of PHP functions that call comment templates and output comments cyclically in WordPress
• A simple method for obtaining the page ID of the template used in WordPress
• How to introduce a template file for WordPress topic creation
• Get the header template and the bottom template in WordPress topic writing
• Describes the PHP functions used in WordPress to obtain comment templates and search forms.

Twenty Eleven, an official topic of NLP recently, has something that cannot be found on the Internet...