WordPress 正文顶端或者末尾插入内容

    function zm_content_insert( $return = 0 ) {// 插入的内容

    	$str.= "<div class='same'>";

    	$str.= "<h4>标题</h4>";

    	$str.= "<p>关注：<a href='http://zmingcx.com/' rel='external nofollow' target='_blank'>知更鸟</a></p>";

    	$str.= "</div>";

    	if ($return) { return $str; } else { echo $str; }

    }

    function zm_content_filter($content) {

    	if(!is_feed() && !is_home() && is_singular() && is_main_query()) {

    		$content .= zm_content_insert(0);// 0在正文上面

    		//$content .= zm_content_insert(1);//1在正文下面

    	}

    	return $content;

    }

    add_filter('the_content','zm_content_filter');