WordPress函数：get_option

WordPress 后台有一些可视化的设置选项，这些选项都可以通过 get_option 函数来调用，陌小雨今天来说说 get_option 函数的使用方法：

get_option( string $option, mixed $default = false )

参数：

$option

(string) (Required) Name of option to retrieve. Expected to not be SQL-escaped.

 $default

(mixed) (Optional) Default value to return if the option does not exist.

Default value: false

用中文来说就是前面一个参数是参数的名称，后面一个是没有设置参数值时候的默认值。（终于知道大学为啥要过英语四级了。。。，感觉好有用！）

A concise list of commonly-used options is below。

下面举出一些 wordpress 后台常用的设置选项

• 'admin_email' – E-mail address of blog administrator.
• 'blogname' – Weblog title; set in General Options.
• 'blogdescription' – Tagline for your blog; set in General Options.
• 'blog_charset' – Character encoding for your blog; set in Reading Options.
• 'date_format' – Default date format; set in General Options.
• 'default_category' – Default post category; set in Writing Options.
• 'home' – The blog’s home web address; set in General Options.
• 'siteurl' – WordPress web address; set in General Options.
  Warning: This is not the same as get_bloginfo( 'url' ) (which will return the homepage url), but as get_bloginfo( 'wpurl' ).
• 'template' – The current theme’s name; set in Presentation.
• 'start_of_week' – Day of week calendar should start on; set in General Options.
• 'upload_path' – Default upload location; set in Miscellaneous Options.
• 'users_can_register' – Whether users can register; set in General Options.
• 'posts_per_page' – Maximum number of posts to show on a page; set in Reading Options.
• 'posts_per_rss' – Maximum number of most recent posts to show in the syndication feed; set in Reading Options.

There are many more options available, a lot of which depend on what plugins you have installed.

函数用法举例：

<?php echo get_option('posts_per_page', 20);>

函数返回你后台设置的每页显示多少篇文章，没有设置的话，就默认 20 篇。