is_home()判断首页

<?php
if(is_home()){
    echo "我只会在首页显示";
}
?>

/**
 * Is the query for the blog homepage?
 *
 * This is the page which shows the time based blog content of your site.
 *
 * Depends on the site's "Front page displays" Reading Settings 'show_on_front' and 'page_for_posts'.
 *
 * If you set a static page for the front page of your site, this function will return
 * true only on the page you set as the "Posts page".
 *
 * @see is_front_page()
 *
 * @since 1.5.0
 *
 * @global WP_Query $wp_query Global WP_Query instance.
 *
 * @return bool True if blog view homepage.
 */
function is_home() {
	global $wp_query;
 
	if ( ! isset( $wp_query ) ) {
		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1' );
		return false;
	}
 
	return $wp_query->is_home();
}

<?php
if(is_home()){
    echo "我只会在首页显示";
}else
{
    echo "我只显示在非首页";
?>