WordPress函数get_category()用法 通过分类id获取分类信息

描述：

通过一个分类id或者对象获取分类所有信息

用法：

<?php get_category( $category, $output, $filter ) ?>

参数：

$category
(integer|object) (必填) 分类ID
默认值: None
$output
(string) (可选) 常量对象、数组或数组
默认值: OBJECT
$filter
(string) (可选) 默认为raw或不应用WordPress定义的过滤器。
默认值: 'raw'

源文件：

/**
* Retrieves category data given a category ID or category object.
*
* If you pass the $category parameter an object, which is assumed to be the
* category row object retrieved the database. It will cache the category data.
*
* If you pass $category an integer of the category ID, then that category will
* be retrieved from the database, if it isn't already cached, and pass it back.
*
* If you look at get_term(), then both types will be passed through several
* filters and finally sanitized based on the $filter parameter value.
*
* The category will converted to maintain backwards compatibility.
*
* @since 1.5.1
*
* @param int|object $category Category ID or Category row object
* @param string $output Optional. Constant OBJECT, ARRAY_A, or ARRAY_N
* @param string $filter Optional. Default is raw or no WordPress defined filter will applied.
* @return object|array|WP_Error|null Category data in type defined by $output parameter.
* WP_Error if $category is empty, null if it does not exist.
*/
function get_category( $category, $output = OBJECT, $filter = 'raw' ) {
$category = get_term( $category, 'category', $output, $filter );

if ( is_wp_error( $category ) )
return $category;

_make_cat_compat( $category );

return $category;
}