2020-05-02 / 6509阅 / 悠然
检索plugins或mu-plugins目录中的URL。
如果未提供任何参数，则默认为插件目录URL。
(string)
(Optional)
Extra path appended to the end of the URL, including the relative directory if $plugin is supplied.
Default value: ''
(string)
(Optional)
A full path to a file inside a plugin or mu-plugin. The URL will be relative to its directory. Typically this is done by passing __FILE__ as the argument.
Default value: ''
(string) Plugins URL link with optional paths appended.