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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
3841 | $user = get_user_by( 'id', (int) $id_or_email->post_author ); |
3842 | } elseif ( $id_or_email instanceof WP_Comment ) { |
3843 | /** |
3844 | * Filter the list of allowed comment types for retrieving avatars. |
3845 | * |
3846 | * @since 3.0.0 |
3847 | * |
3848 | * @param array $types An array of content types. Default only contains 'comment'. |
3849 | */ |
3850 | $allowed_comment_types = apply_filters( 'get_avatar_comment_types', array( 'comment' ) ); |
3851 | if ( ! empty( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (array) $allowed_comment_types ) ) { |
3852 | $args['url'] = false; |
3853 | /** This filter is documented in wp-includes/link-template.php */ |
3854 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
3855 | } |
3856 |
|
3857 | if ( ! empty( $id_or_email->user_id ) ) { |
3858 | $user = get_user_by( 'id', (int) $id_or_email->user_id ); |
3859 | } |