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wp_get_post_categories › WordPress Function

Since2.1.0
已弃用n/a
› wp_get_post_categories ( $post_id = 0, $args = array() )
参数: (2)
  • (int) $post_id Optional. The Post ID. Does not default to the ID of the global $post. Default 0.
    Required: No
    默认: —
  • (array) $args Optional. Category query parameters. Default empty array. See WP_Term_Query::__construct() for supported arguments.
    Required: No
    默认: array()
查看:
返回:
  • (int[]|WP_Term[]|string[]|string|WP_Error) List of categories. An array of category IDs by
    default, and if the `$fields` argument passed via
    `$args` is 'ids'. If `$fields` is 'all' or
    'all_with_object_id', an array of WP_Term objects.
    If `$fields` is 'names', an array of category names.
    If `$fields` is 'count', a count thereof as a numeric
    string. WP_Error object if 'category' taxonomy
    doesn't exist.
定义在:
文档:

Retrieves the list of categories for a post.

Compatibility layer for themes and plugins. Also an easy layer of abstraction away from the complexity of the taxonomy layer.


Related Functions: wp_set_post_categories, wp_get_post_cats, wp_get_post_terms, wp_get_ability_categories, wp_list_categories

源码 

function wp_get_post_categories( $post_id = 0, $args = array() ) {
	$post_id = (int) $post_id;

	$defaults = array( 'fields' => 'ids' );
	$args     = wp_parse_args( $args, $defaults );

	$cats = wp_get_object_terms( $post_id, 'category', $args );
	return $cats;
}