WordPress无需插件移除Category分类字符

如果我们默认使用WordPress程序的时候，内容分类是有自带Category字符的。这个其实也是给用户和搜索引擎提示这个是分类页面，但是如果我们喜欢短URL的，那就需要将Category隐藏去掉。这里，我们有可以用No Category Base插件安装激活即可实现，同样的，这里我们看到有直接无需插件的，代码实现。

//无需插件移除category分类字符
add_action( 'load-themes.php',  'no_category_base_refresh_rules');
add_action('created_category', 'no_category_base_refresh_rules');
add_action('edited_category', 'no_category_base_refresh_rules');
add_action('delete_category', 'no_category_base_refresh_rules');
function no_category_base_refresh_rules() {
	global $wp_rewrite;
	$wp_rewrite -> flush_rules();
}

add_action('init', 'no_category_base_permastruct');
function no_category_base_permastruct() {
	global $wp_rewrite, $wp_version;
	if (version_compare($wp_version, '3.4', '<')) {
		$wp_rewrite -> extra_permastructs['category'][0] = '%category%';
	} else {
		$wp_rewrite -> extra_permastructs['category']['struct'] = '%category%';
	}
}

add_filter('category_rewrite_rules', 'no_category_base_rewrite_rules');
function no_category_base_rewrite_rules($category_rewrite) {
	$category_rewrite = array();
	$categories = get_categories(array('hide_empty' => false));
	foreach ($categories as $category) {
		$category_nicename = $category -> slug;
		if ($category -> parent == $category -> cat_ID)// recursive recursion
			$category -> parent = 0;
		elseif ($category -> parent != 0)
			$category_nicename = get_category_parents($category -> parent, false, '/', true) . $category_nicename;
		$category_rewrite['(' . $category_nicename . ')/(?:feed/)?(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?category_name=$matches[1]&feed=$matches[2]';
		$category_rewrite['(' . $category_nicename . ')/page/?([0-9]{1,})/?$'] = 'index.php?category_name=$matches[1]&paged=$matches[2]';
		$category_rewrite['(' . $category_nicename . ')/?$'] = 'index.php?category_name=$matches[1]';
	}
	global $wp_rewrite;
	$old_category_base = get_option('category_base') ? get_option('category_base') : 'category';
	$old_category_base = trim($old_category_base, '/');
	$category_rewrite[$old_category_base . '/(.*)$'] = 'index.php?category_redirect=$matches[1]';

	return $category_rewrite;
}

add_filter('query_vars', 'no_category_base_query_vars');
function no_category_base_query_vars($public_query_vars) {
	$public_query_vars[] = 'category_redirect';
	return $public_query_vars;
}

add_filter('request', 'no_category_base_request');
function no_category_base_request($query_vars) {
	if (isset($query_vars['category_redirect'])) {
		$catlink = trailingslashit(get_option('home')) . user_trailingslashit($query_vars['category_redirect'], 'category');
		status_header(301);
		header("Location: $catlink");
		exit();
	}
	return $query_vars;
}

当然，这个代码其实也是来自于这个插件，添加到 Functions.php 中。