add_comment_meta
add_comment_meta ( $comment_id, $meta_key, $meta_value, $unique = false )
Parameters:- (int) comment_id Comment ID.
- (string) meta_key Metadata name.
- (mixed) meta_value Metadata value. Arrays and objects are stored as serialized data and
will be returned as the same type when retrieved. Other data types will
be stored as strings in the database:
- false is stored and retrieved as an empty string ('')
- true is stored and retrieved as '1'
- numbers (both integer and float) are stored and retrieved as strings
Must be serializable if non-scalar.
- (bool) unique Optional. Whether the same key should not be added.
Default false.
Links:Returns:- (int|false) Meta ID on success, false on failure.
Defined at: - Introduced in WordPress: 2.9.0
- Deprecated in WordPress: —
Description
Adds meta data field to a comment.For historical reasons both the meta key and the meta value are expected to be "slashed" (slashes escaped) on input.