wordpress模板机制分析介绍

<?php
get_header(); ?>
<div id="primary" class="content-area">
<div id="content" class="site-content" role="main">
<?php if ( have_posts() ) : ?>
<?php /* The loop */ ?>
<?php while ( have_posts() ) : the_post(); ?>
<?php get_template_part( 'content', get_post_format() ); ?>
<?php endwhile; ?>
<?php twentythirteen_paging_nav(); ?>
<?php else : ?>
<?php get_template_part( 'content', 'none' ); ?>
<?php endif; ?>
</div><!-- #content -->
</div><!-- #primary -->
<?php get_sidebar(); ?>
<?php get_footer(); ?>

function get_sidebar( $name = null ) {
/**
* Fires before the sidebar template file is loaded.
*
* The hook allows a specific sidebar template file to be used in place of the
* default sidebar template file. If your file is called sidebar-new.php,
* you would specify the filename in the hook as get_sidebar( 'new' ).
*
* @since 2.2.0
* @since 2.8.0 $name parameter added.
*
* @param string $name Name of the specific sidebar file to use.
*/
do_action( 'get_sidebar', $name );
$templates = array();
$name = (string) $name;
if ( '' !== $name )
$templates[] = "sidebar-{$name}.php";
$templates[] = 'sidebar.php';
// Backward compat code will be removed in a future release
if ('' == locate_template($templates, true))
load_template( ABSPATH . WPINC . '/theme-compat/sidebar.php');
}

function have_posts() {
global $wp_query;
return $wp_query->have_posts();
}

function get_template_part( $slug, $name = null ) {
/**
* Fires before the specified template part file is loaded.
*
* The dynamic portion of the hook name, `$slug`, refers to the slug name
* for the generic template part.
*
* @since 3.0.0
*
* @param string $slug The slug name for the generic template.
* @param string $name The name of the specialized template.
*/
do_action( "get_template_part_{$slug}", $slug, $name );
$templates = array();
$name = (string) $name;
if ( '' !== $name )
$templates[] = "{$slug}-{$name}.php";
$templates[] = "{$slug}.php";
locate_template($templates, true, false);
}

get_template_part( 'content', get_post_format() );

<?php
/** * The default template for displaying content * * Used for both single and index/archive/search. * * @package WordPress * @subpackage Twenty_Thirteen * @since Twenty Thirteen 1.0 */?><article id="post-<?php the_ID(); ?>" <?php post_class(); ?>> <header class="entry-header"> <?php if ( has_post_thumbnail() && ! post_password_required() && ! is_attachment() ) : ?> <div class="entry-thumbnail"> <?php the_post_thumbnail(); ?> </div> <?php endif; ?> <?php if ( is_single() ) : ?> <h1 class="entry-title"><?php the_title(); ?></h1> <?php else : ?> <h1 class="entry-title"> <a href="<?php the_permalink(); ?>" rel="bookmark"><?php the_title(); ?></a> </h1> <?php endif; // is_single() ?> <div class="entry-meta"> <?php twentythirteen_entry_meta(); ?> <?php edit_post_link( __( 'Edit', 'twentythirteen' ), '<span class="edit-link">', '</span>' ); ?> </div><!-- .entry-meta --> </header><!-- .entry-header --> <?php if ( is_search() ) : // Only display Excerpts for Search ?> <div class="entry-summary"> <?php the_excerpt(); ?> </div><!-- .entry-summary --> <?php else : ?> <div class="entry-content"> <?php /* translators: %s: Name of current post */ the_content( sprintf( __( 'Continue reading %s <span class="meta-nav">→</span>', 'twentythirteen' ), the_title( '<span class="screen-reader-text">', '</span>', false ) ) ); wp_link_pages( array( 'before' => '<div class="page-links"><span class="page-links-title">' . __( 'Pages:', 'twentythirteen' ) . '</span>', 'after' => '</div>', 'link_before' => '<span>', 'link_after' => '</span>' ) ); ?> </div><!-- .entry-content --> <?php endif; ?> <footer class="entry-meta"> <?php if ( comments_open() && ! is_single() ) : ?> <div class="comments-link"> <?php comments_popup_link( '<span class="leave-reply">' . __( 'Leave a comment', 'twentythirteen' ) . '</span>', __( 'One comment so far', 'twentythirteen' ), __( 'View all % comments', 'twentythirteen' ) ); ?> </div><!-- .comments-link --> <?php endif; // comments_open() ?> <?php if ( is_single() && get_the_author_meta( 'description' ) && is_multi_author() ) : ?> <?php get_template_part( 'author-bio' ); ?> <?php endif; ?> </footer><!-- .entry-meta --></article><!-- #post -->

post_class(): Display the classes for the post div.
the_title: Display or retrieve the current post title with optional content.
the_permalink():Display the permalink for the current post.
the_excerpt()：Display the post excerpt.
the_content(): Display the post content.

public function __construct($query = '') {
if ( ! empty($query) ) {
$this->query($query);
}
}
public function query( $query ) {
$this->init();
$this->query = $this->query_vars = wp_parse_args( $query );
return $this->get_posts();
}