function gdk_prettify_replace($text) {
    $replace = array(
        '
' => '
'
    );
    $text = str_replace(array_keys($replace) , $replace, $text);
    return $text;
}
add_filter('the_content', 'gdk_prettify_replace');



//禁用emoji功能
if (gdk_option('gdk_disable_emojis')) {
        function gdk_disable_emojis_link() {
            remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
            remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
            remove_action( 'wp_print_styles', 'print_emoji_styles' );
            remove_action( 'admin_print_styles', 'print_emoji_styles' ); 
            remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
            remove_filter( 'comment_text_rss', 'wp_staticize_emoji' ); 
            remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
            add_filter( 'tiny_mce_plugins', 'gdk_disable_emojis_tinymce' );
        }
        add_action( 'init', 'gdk_disable_emojis_link' );

        function gdk_disable_emojis_tinymce( $plugins ) {
            if ( is_array( $plugins ) ) return array_diff( $plugins, array( 'wpemoji' ) );
            return array();
        }
}


//禁用 XML-RPC 接口
if (gdk_option('gdk_disable_xmlrpc')) {
	add_filter('xmlrpc_enabled', '__return_false');
	remove_action('xmlrpc_rsd_apis', 'rest_output_rsd');
}


//禁用日志修订功能
if (gdk_option('gdk_disable_revision')) {
	add_filter( 'wp_revisions_to_keep', 'gdk_revisions_to_keep', 10, 2 );
	function gdk_revisions_to_keep( $num, $post ) {
		return 0;
	}
	add_action('wp_print_scripts','gdk_disable_autosave');
	function gdk_disable_autosave() {
		wp_deregister_script('autosave');
	}
}

//彻底关闭 pingback
if (gdk_option('gdk_disable_trackbacks')) {
	add_filter('xmlrpc_methods', 'gdk_xmlrpc_methods');
	function gdk_xmlrpc_methods($methods) {
		unset($methods['system.multicall']);
		$methods['pingback.ping']                    = '__return_false';
		$methods['pingback.extensions.getPingbacks'] = '__return_false';
		return $methods;
	}
	//禁用 pingbacks, enclosures, trackbacks
	remove_action('do_pings', 'do_all_pings', 10);
	//去掉 _encloseme 和 do_ping 操作。
	remove_action('publish_post', '_publish_post_hook', 5);
}

//国内更新word press加速
if (gdk_option('gdk_porxy_update') && !gdk_option('gdk_diasble_wp_update')) {
	add_filter('site_transient_update_core',function($value) {
		foreach($value->updates as &$update) {
			if($update->locale == 'zh_CN') {
				$update->download = 'http://cn.wp101.net/latest-zh_CN.zip';
				$update->packages->full = 'http://cn.wp101.net/latest-zh_CN.zip';
			}
		}
		return $value;
	}
	);
}

//页面伪静态
function gdk_page_permalink() {
	global $wp_rewrite;
	if (!strpos($wp_rewrite->get_page_permastruct(), '.html')) {
		$wp_rewrite->page_structure = $wp_rewrite->page_structure . '.html';
	}
}
add_action('init', 'gdk_page_permalink', -1);


//文件自动重命名
if(gdk_option('gdk_upload_rename')) {
	function gdk_upload_rename( $file ) {
		$info = pathinfo($file['name']);
		$ext = $info['extension'];
		$ignore_exts = ['zip', 'rar', '7z'];
		//被忽略的文件格式
		if (!in_array($ext, $ignore_exts)) {
			$filedate = date('YmdHis').mt_rand(100, 999);
			$file['name'] = $filedate.'.'.$ext;
		}
		return $file;
	}
	add_filter('wp_handle_upload_prefilter', 'gdk_upload_rename' );
}

// 禁用自动生成的图片尺寸
function shapeSpace_disable_image_sizes($sizes) {
	
	unset($sizes['thumbnail']);    // disable thumbnail size
	unset($sizes['medium']);       // disable medium size
	unset($sizes['large']);        // disable large size
	unset($sizes['medium_large']); // disable medium-large size
	unset($sizes['1536x1536']);    // disable 2x medium-large size
	unset($sizes['2048x2048']);    // disable 2x large size
	
	return $sizes;
	
}
add_action('intermediate_image_sizes_advanced', 'shapeSpace_disable_image_sizes');

// 禁用缩放尺寸
add_filter('big_image_size_threshold', '__return_false');

// 禁用其他图片尺寸
function shapeSpace_disable_other_image_sizes() {
	
	remove_image_size('post-thumbnail'); // disable images added via set_post_thumbnail_size() 
	remove_image_size('another-size');   // disable any other added image sizes
	
}
add_action('init', 'shapeSpace_disable_other_image_sizes');

// 搜索结果为1时候自动跳转到对应页面
function gdk_redirect_single_search_result() {
	if ( is_search() ) {
		global $wp_query;
		if ($wp_query->post_count == 1) {
			wp_redirect( get_permalink( $wp_query->posts['0']->ID ) );
			exit();
		}
	}
}
add_action('template_redirect', 'gdk_redirect_single_search_result');
//搜索链接伪静态
function gdk_redirect_search() {
	if ( is_search() && ! empty( $_GET['s'] ) ) {
		wp_redirect( home_url( "/search/" ) . urlencode( get_query_var( 's' ) ) );
		exit();
	}
}
add_action('template_redirect', 'gdk_redirect_search' );


//小工具运行短代码
add_filter( 'widget_text', 'shortcode_unautop' );
add_filter( 'widget_text', 'do_shortcode' );


//替换后台默认的底部文字内容
function gdk_replace_footer_admin() {
	$result = apply_filters('gdk_filter_admin_footer_text', '由GDK插件提供底层支持');
	echo $result;
}
add_filter('admin_footer_text', 'gdk_replace_footer_admin');


//隐藏用户昵称
add_filter('redirect_canonical', 'security_stop_user_enumeration', 10, 2);
if ( ! function_exists( 'security_stop_user_enumeration' ) ) {
    function security_stop_user_enumeration( $redirect, $request ) {
        if ( preg_match( '/\?author=([0-9]*)(\/*)/i', $request ) ) {
            wp_redirect( get_site_url(), 301 );
            die();
        } else {
            return $redirect;
        }
    }
}


//禁用REST API功能
add_action( 'rest_pre_dispatch', 'deactivate_rest_api' );
add_action( 'rest_authentication_errors', 'deactivate_rest_api' );
function deactivate_rest_api() {
    status_header( 405 );
    die( '{"code":"rest_api_disabled","message":"REST API services are disabled on this site.","data":{"status":405}}' );
}

// Remove the REST API endpoint.
remove_action( 'rest_api_init', 'wp_oembed_register_route' );





//记录登陆失败发邮件
add_action( 'wp_authenticate', 'log_login', 10, 2 );
function log_login( $username, $password ) {

    if ( ! empty( $username ) && ! empty( $password ) ) {

        $check = wp_authenticate_username_password( NULL, $username, $password );
        if ( is_wp_error( $check ) ) {

            $ua = getBrowser();
            $agent = $ua['name'] . " " . $ua['version'];

            $referrer = ( isset( $_SERVER['HTTP_REFERER'] ) ) ? $_SERVER['HTTP_REFERER'] : $_SERVER['PHP_SELF'];
            if ( strstr( $referrer, 'wp-login' ) ) {
                $ref = 'wp-login.php';
            }

            if ( strstr( $referrer, 'wp-admin' ) ) {
                $ref = 'wp-admin/';
            }

            $contact_errors = false;

            // get the posted data
            $name = "WordPress " . get_bloginfo( 'name' );
            $email_address = get_bloginfo('admin_email' );

            // write the email content
            $header = "MIME-Version: 1.0\n";
            $header .= "Content-Type: text/html; charset=utf-8\n";
            $header .= "From: $name <$email_address>\n";

            $message = "Failed login attempt on " . $name . "
" . PHP_EOL;
            $message .= 'IP: ' . get_ip_address() . "
" . PHP_EOL;
            $message .= 'WhoIs: ' . get_ip_address() . "
" . PHP_EOL;
            $message .= "Browser: " . $agent . "
" . PHP_EOL;
            $message .= "OS: " . $ua['platform'] . "
" . PHP_EOL;
            $message .= "Date: " . date('Y-m-d H:i:s') . "
" . PHP_EOL;
            $message .= "Referrer: " . $referrer . "
" . PHP_EOL;
            $message .= "User Agent: " . $ua['userAgent'] . "
" . PHP_EOL;
            $message .= "Username: " . $username . "
" . PHP_EOL;
            $message .= "Password: " . $password . "
" . PHP_EOL;

            $subject = "Failed login attempt - " . $name;
            $subject = "=?utf-8?B?" . base64_encode($subject) . "?=";

            $to = $email_address;

            if ( ! empty( $to ) ) {

                // send the email using wp_mail()
                if ( ! wp_mail( $to, $subject, $message, $header ) ) {
                    $contact_errors = true;
                }
            }

        }
    }
}

//前台禁止加载语言包
add_filter('locale', function($locale) {
    $locale = ( is_admin() ) ? $locale : 'en_US';
    return $locale;
});

// 定制登录页面链接的连接
add_filter('login_headerurl', function (){
	return home_url();
});


// 定制登录页面链接的标题
add_filter('login_headertext', function (){
	return get_bloginfo('name');
});




    
    function gdk_custom_head_code() {
        $gdk_option = get_option('gdk_option');
        $site = $gdk_option['site'];
        echo $site['custom_head_code'];
    }
    add_action('wp_head', 'gdk_custom_head_code');



    function gdk_custom_footer_code() {
        $gdk_option = get_option('gdk_option');
        $site = $gdk_option['site'];
        echo $site['custom_footer_code'];
    }
    add_action('wp_footer', 'gdk_custom_footer_code');




if(gdk_option('gdk_no_category')){
    if (!function_exists('gdk_no_category_base_refresh_rules')):
        add_action('load-themes.php',  'gdk_no_category_base_refresh_rules');
        add_action('created_category', 'gdk_no_category_base_refresh_rules');
        add_action('edited_category', 'gdk_no_category_base_refresh_rules');
        add_action('delete_category', 'gdk_no_category_base_refresh_rules');
        function gdk_no_category_base_refresh_rules() {
            global $wp_rewrite;
            $wp_rewrite -> flush_rules();
        }
        add_action('init', 'gdk_no_category_base_permastruct');
        function gdk_no_category_base_permastruct() {
            global $wp_rewrite, $wp_version;
            if (version_compare($wp_version, '3.4', '<')) {
                // For pre-3.4 support
                $wp_rewrite -> extra_permastructs['category'][0] = '%category%';
            } else {
                $wp_rewrite -> extra_permastructs['category']['struct'] = '%category%';
            }
        }
        // Add our custom category rewrite rules
        add_filter('category_rewrite_rules', 'gdk_no_category_base_rewrite_rules');
        function gdk_no_category_base_rewrite_rules($category_rewrite) {
            //var_dump($category_rewrite); // For Debugging
            $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]';
            }
            // Redirect support from Old Category Base
            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 'category_redirect' query variable
        add_filter('query_vars', 'gdk_no_category_base_query_vars');
        function gdk_no_category_base_query_vars($public_query_vars) {
            $public_query_vars[] = 'category_redirect';
            return $public_query_vars;
        }

        add_filter('request', 'gdk_no_category_base_request');
        function gdk_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;
        }
    endif;
}