去掉WordPress分类URL中的category

在WordPress后台设置伪静态的时候，分类的url中会出现category，而在函数文件放入以下代码即可清除。

<?php
add_action( 'load-themes.php', 'del_category_base_refresh_rules' );
add_action('created_category', 'del_category_base_refresh_rules');
add_action('delete_category', 'del_category_base_refresh_rules');
add_action('edited_category', 'del_category_base_refresh_rules');
add_action('init', 'del_category_base_permastruct');

add_filter('category_rewrite_rules', 'del_category_base_rewrite_rules');
add_filter('query_vars', 'del_category_base_query_vars');
add_filter('request', 'del_category_base_request');
register_deactivation_hook(__FILE__, 'del_category_base_deactivate');

function del_category_base_refresh_rules() {
global $wp_rewrite;
$wp_rewrite->flush_rules();
}

function del_category_base_deactivate() {
remove_filter( 'category_rewrite_rules', 'del_category_base_rewrite_rules' );
del_category_base_refresh_rules();
}

function del_category_base_permastruct() {
global $wp_rewrite;
global $wp_version;

if ( $wp_version >= 3.4 ) {
$wp_rewrite->extra_permastructs['category']['struct'] = '%category%';
} else {
$wp_rewrite->extra_permastructs['category'][0] = '%category%';
}
}

function del_category_base_rewrite_rules($category_rewrite) {
global $wp_rewrite;
$category_rewrite=array();
if ( class_exists( 'Sitepress' ) ) {
global $sitepress;

remove_filter( 'terms_clauses', array( $sitepress, 'terms_clauses' ) );
$categories = get_categories( array( 'hide_empty' => false ) );
add_filter( 'terms_clauses', array( $sitepress, 'terms_clauses' ), 10, 4 );
} else {
$categories = get_categories( array( 'hide_empty' => false ) );
}

foreach( $categories as $category ) {
$category_nicename = $category->slug;

if ( $category->parent == $category->cat_ID ) {
$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})/{$wp_rewrite->pagination_base}/?([0-9]{1,})/?$"] = 'index.php?category_name=$matches[1]&paged=$matches[2]';
$category_rewrite['('.$category_nicename.')/?
] = 'index.php?category_name=$matches[1]';
}

$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;
}

function del_category_base_query_vars($public_query_vars) {
$public_query_vars[] = 'category_redirect';
return $public_query_vars;
}

function del_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;
}