如果您不关心此页面的URL，可以在不使用Ajax的情况下使用$_GET 参数。看一看：

// If we have $_GET parameter in URL, we save it in $page variable. Otherwise $page will be empty.
( isset( $_GET[\'page\'] ) ) ? $page = ( int ) $_GET[\'page\'] : $page = \'\';

get_header();

if ( $page != \'\' ) :
    // If $page variable is not empty, we get post(page) by ID
    $header_page = get_post( $page );
    // Then we can print anything we want, using this post object: title, content, custom fields, thumbnail, etc.
    echo $header_page->post_title; // Post title 
    echo apply_filters( \'the_content\', $header_page->post_content ); // Post content
    echo get_post_meta( $page, \'custom_meta_key\', 1 ); // Any custom field
    echo get_the_post_thumbnail ( $page, \'post-thumbnail\' ); // Post thumbnail
endif; 

// Our links will look like so:
?><a href="<?php echo $_SERVER[\'REQUEST_URI\']; ?>?page=123">Some title</a><?php
// Here 123 is ID of page, which content we want to show.

get_footer();

单击此类链接时，您将转到同一页面，但URL中有一个新参数。例如：

http://site.ru/page -> http://site.ru/page?page=123.

但是如果您想拥有“干净”的URL，那么就需要Ajax。