get_option()函数，实际上我们在整合后台功能的时候经常会用到的一个函数，主要用来从 WordPress 博客数据库wp_options表中取得我们想要的字段内容的一个函数。
语法结构
<?php echo get_option( $option, $default ); ?>参数：
$option (string) （必选）获取选项的名称，只允许下划线分隔的小写字母组合，如show或者show_id形式，默认值none。
$default(mixed) （可选）如果不存在并且设置了默认值的话就返回默认值，否则返回默认False
部分配置属性列表（配置属性表大全）
admin_email – 网站的管理员邮件地址
blogname – 网站的站点名称
blogdescription – 网站的站点副标题
blog_charset – 站点的字符编码集
date_format – 默认的时间格式
default_category – 默认的文章分类
template – 当前设置的主题名称
posts_per_page – 单页显示的最大文章数
<?php echo get_option("wpxk", "WordPress");
//如果wp_option表中没有wpxk这条记录，就默认返回“WordPress” ?>
//将博客名称显示在<h1>标签中 <h1><?php echo get_option( 'blogname' ); ?></h1>
//显示站点正在使用的编码（比如：UTF-8） <p>Character set: <?php echo get_option( 'blog_charset' ); ?> </p>
博客管理员的邮件地址，并将它存在变量中。 <?php $admin_email = get_option( 'admin_email' ); ?>
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Discussion
blacklist_keys
When a comment contains any of these words in its content, name, URL, e-mail, or IP, it will be marked as spam. One word or IP per line. It will match inside words, so "press" will match "WordPress."
Default: NULL
Data type: String (possibly multi-line)
comment_max_links
Hold a comment in the queue if it contains the value of this option or more.
Default: 2
Data type: Integer
comment_moderation
Before a comment appears, an administrator must always approve the comment.
1 : Yes
0 : False (default)
Data type: Integer
comments_notify
E-mail me when anyone posts a comment.
1 : Yes (default)
0 : No
Data type: Integer
default_comment_status
Allow comments (can be overridden with individual posts)
open : Allow comments (default)
closed : Disallow comments
Data type: String
default_ping_status
Allow link notifications from other blogs (pingbacks and trackbacks).
open : Allow pingbacks and trackbacks from other blogs (default)
closed : Disallow pingbacks and trackbacks from other blogs
Data type: String
default_pingback_flag
Attempt to notify any blogs linked to from the article (slows down posting).
1 : Yes (default)
0 : No
Data type: Integer
moderation_keys
When a comment contains any of these words in its content, name, URL, e-mail, or IP, it will be held in the moderation queue. One word or IP per line. It will match inside words, so "press" will match "WordPress."
Default: NULL
Data type: String (possibly multi-line)
moderation_notify
E-mail me when a comment is held for moderation.
1 : Yes (default)
0 : No
Data type: Integer
require_name_email
Before a comment appears, the comment author must fill out his/her name and email.
1 : Yes (default)
0 : No
Data type: Integer
thread_comments
Enable WP-native threaded (nested) comments.
1 : Yes
0 : No (default)
Data type: Integer
thread_comments_depth
Set the number of threading levels for comments.
1 thru 10 : levels
Default: 5
Data type: Integer
show_avatars
Avatar Display
1 : (default) Show Avatars
0 : Do not show Avatars
Data type: Integer
avatar_rating
Maximum Rating
G : (default) Suitable for all audiences
PG : Possibly offensive, usually for audiences 13 and above
R : Intended for adult audiences above 17
X : Even more mature than above
Data type: String
avatar_default
Default Avatar
mystery : (default) Mystery Man
blank : Blank
gravatar_default : Gravatar Logo
identicon : Identicon (Generated)
wavatar : Wavatar (Generated)
monsterid : MonsterID (Generated)
retro : Retro (Generated)
Data type: String
close_comments_for_old_posts
Automatically close comments on old articles
1 : Yes
0 : No (default)
Data type: Integer
close_comments_days_old
Automatically close comments on articles older than x days
Default: 14
Data type: Integer
show_comments_cookies_opt_in
Show the cookies opt-in checkbox on the comment form and enable comment cookies
1 : Yes (default as of 4.9.8)
0 : No
Data type: Integer
page_comments
Break comments into pages
1 : Yes (default)
0 : No
Data type: Integer
comments_per_page
Default: 50
Data type: Integer
default_comments_page
Default: 'newest'
Data type: String
comment_order
asc : (default)
desc :
Data type: String
comment_whitelist
Comment author must have a previously approved comment
1 : Yes (default)
0 : No
Data type:
General
admin_email
Administrator email
Default: 'you@example.com'
Data type: String
blogdescription
Blog tagline
Default: '__('Just another WordPress weblog')'
Data type: String
blogname
Blog title
Default: '__('My Blog')'
Data type: String
comment_registration
Users must be registered and logged in to comment
1 : Yes
0 : No (default)
Data type: Integer
date_format
Default date format (see Formatting Date and Time)
Default: '__('F j, Y')'
Data type: String
default_role
The default role of users who register at the blog.
subscriber : (default)
administrator :
editor :
author :
contributor :
Data type: String
gmt_offset
Times in the blog should differ by this value.
-6 : GMT -6 (aka Central Time, USA)
0 : GMT (aka Greenwich Mean Time)
Default: date('Z') / 3600
Data type: Integer
home
Blog address (URL)
Default: wp_guess_url()
Data type: String (URI)
siteurl
WordPress address (URL)
Default: wp_guess_url()
Data type: String (URI)
start_of_week
The starting day of the week.
0 : Sunday
1 : Monday (default)
2 : Tuesday
3 : Wednesday
4 : Thursday
5 : Friday
6 : Saturday
Data type: Integer
time_format
Default time format (see Formatting Date and Time)
Default: '__('g:i a')'
Data type: String
timezone_string
Timezone
Default: NULL
Data type: String
users_can_register
Anyone can register
1 : Yes
0 : No (default)
Data type: Integer
Links
links_updated_date_format
Default: '__('F j, Y g:i a')'
Data type: String
links_recently_updated_prepend
Default: ''
Data type: String
links_recently_updated_append
Default: ''
Data type: String
links_recently_updated_time
Default: 120
Data type: Integer
Media
thumbnail_size_w
Default: 150
Data type: Integer
thumbnail_size_h
Default: 150
Data type: Integer
thumbnail_crop
Crop thumbnail to exact dimensions (normally thumbnails are proportional)
1 : Yes (default)
0 : No
Data type: Integer
medium_size_w
Default: 300
Data type: Integer
medium_size_h
Default: 300
Data type: Integer
large_size_w
Default: 1024
Data type: Integer
large_size_h
Default: 1024
Data type: Integer
embed_autourls
Attempt to automatically embed all plain text URLs
Default: 1
Data type: Integer
embed_size_w
Default: NULL
Data type: Integer
embed_size_h
Default: 600
Data type: Integer
Miscellaneous
hack_file
Use legacy my-hacks.php file support
1 : Yes
0 : No (default)
Data type: Integer
html_type
Default MIME type for blog pages (text/html, text/xml+html, etc.)
Default: 'text/html'
Data type: String (MIME type)
secret
Secret value created during installation used with salting, etc.
Default: wp_generate_password(64)
Data type: String (MD5)
upload_path
Store uploads in this folder (relative to the WordPress root)
Default: NULL
Data type: String (relative path)
upload_url_path
URL path to upload folder (will be blank by default - Editable in All Settings Screen.
Data type: String (URL path)
uploads_use_yearmonth_folders
Organize my uploads into month- and year-based folders
1 : Yes (default)
0 : No (default for safe mode)
Data type: Integer
use_linksupdate
Track links' update times
1 : Yes
0 : No (default)
Data type: Integer
Permalinks
permalink_structure
The desired structure of your blog's permalinks. Some examples:
/%year%/%monthnum%/%day%/%postname%/ : Date and name based
/archives/%post_id%/ : Numeric
/%postname%/ : Post name-based
You can see more examples by viewing Using Permalinks.
Default: NULL
Data type: String
category_base
The default category base of your blog categories permalink.
Default: NULL
Data type: String
tag_base
The default tag base for your blog tags permalink.
Default: NULL
Data type: String
Privacy
blog_public
1 : I would like my blog to be visible to everyone, including search engines (like Google, Sphere, Technorati) and archivers. (default)
0 : I would like to block search engines, but allow normal visitors.
Data type: Integer
Reading
blog_charset
Encoding for pages and feeds. The character encoding you write your blog in (UTF-8 is recommended).
Default: 'UTF-8'
Data type: String
gzipcompression
WordPress should compress articles (with gzip) if browsers ask for them.
1 : Yes
0 : No (default)
Data type: Integer
page_on_front
The ID of the page that should be displayed on the front page. Requires show_on_front's value to be page.
Data type: Integer
page_for_posts
The ID of the page that displays posts. Useful when show_on_front's value is page.
Data type: Integer
posts_per_page
Show at most x many posts on blog pages.
Default: 10
Data type: Integer
posts_per_rss
Show at most x many posts in RSS feeds.
Default: 10
Data type: Integer
rss_language
Language for RSS feeds (metadata purposes only)
Default: 'en'
Data type: String (ISO two-letter language code)
rss_use_excerpt
Show an excerpt instead of the full text of a post in RSS feeds
1 : Yes
0 : No (default)
Data type: Integer
show_on_front
What to show on the front page
posts : Your latest posts (default)
page : A static page (see page_on_front)
Data type: String
Themes
template
The slug of the currently activated theme (how it is accessed by path, ex. /wp-content/themes/some-theme: some-theme would be the value)
Default: 'default'
Data type: String
stylesheet
The slug of the currently activated stylesheet (style.css) (how it is accessed by path, ex. /wp-content/themes/some-style: some-style would be the value)
Default: 'default'
Data type: String
Writing
default_category
ID of the category that posts will be put in by default
Default: 1
Data type: Integer
default_email_category
ID of the category that posts will be put in by default when written via e-mail
Default: 1
Data type: Integer
default_link_category
ID of the category that links will be put in by default
Default: 2
Data type: Integer
default_post_edit_rows
Size of the post box (in lines)
Default: 10
Data type: Integer
mailserver_login
Mail server username for posting to WordPress by e-mail
Default: 'login@example.com'
Data type: String
mailserver_pass
Mail server password for posting to WordPress by e-mail
Default: 'password'
Data type: String
mailserver_port
Mail server port for posting to WordPress by e-mail
Default: 110
Data type: Integer
mailserver_url
Mail server for posting to WordPress by e-mail
Default: 'mail.example.com'
Data type: String
ping_sites
When you publish a new post, WordPress automatically notifies the following site update services. For more about this, see Update Services. Separate multiple service URLs with line breaks. Requires blog_public to have a value of 1.
Default: 'http://rpc.pingomatic.com/'
Data type: String (possibly multi-line)
use_balanceTags
Correct invalidly-nested XHTML automatically
1 : Yes
0 : No (default)
Data type: Integer
use_smilies
Convert emoticons like 🙂 and 😛 to graphics when displayed
1 : Yes (default)
0 : No
Data type: Integer
use_trackback
Enable sending and receiving of trackbacks
1 : Yes
0 : No (default)
enable_app
Enable the Atom Publishing Protocol
1 : Yes
0 : No (default)
Data type: Integer
enable_xmlrpc
Enable the WordPress, Movable Type, MetaWeblog and Blogger XML-RPC publishing protocols
1 : Yes
0 : No (default)
Data type: Integer
Uncategorized
active_plugins
Returns an array of strings containing the path of the main php file of the plugin. The path is relative to the plugins folder. An example of path in the array : 'myplugin/mainpage.php'.
Default: array()
Data type: Array
advanced_edit
Default: 0
Data type: Integer
recently_edited
Default: NULL
Data type:
image_default_link_type
Default: 'file'
Data type: 'file', 'none'
image_default_size
Default: NULL
Data type: 'thumbnail', 'medium', 'large' or Custom size: https://codex.wordpress.org/Function_Reference/add_image_size
image_default_align
Default: NULL
Data type: 'left', 'right', 'center', 'none'
sidebars_widgets
Returns array of sidebar states (list of active and inactive widgets).
Default:
Data type: Array
sticky_posts
Default: array()
Data type:
widget_categories
Default: array()
Data type:
widget_text
Default: array()
Data type:
widget_rss
Default: array()
Data type: