描述：

加载主题支持的所有函数

用法：

参数：

$feature

(string) (必填) 要检查的功能

默认值: None

$include

(string) (必填) 包含实现功能的函数的文件

默认值: None

源文件：
/**
* Checks a theme's support for a given feature before loading the functions which implement it.
*
* @since 2.9.0
*
* @param string $feature The feature being checked.
* @param string $include Path to the file.
* @return bool True if the current theme supports the supplied feature, false otherwise.
*/
function require_if_theme_supports( $feature, $include ) {
if ( current_theme_supports( $feature ) ) {
require ( $include );
return true;
}
return false;
}