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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 |
|---|---|
| 3903 | $user = get_user_by( 'id', (int) $id_or_email->post_author ); |
| 3904 | } elseif ( $id_or_email instanceof WP_Comment ) { |
| 3905 | /** |
| 3906 | * Filters the list of allowed comment types for retrieving avatars. |
| 3907 | * |
| 3908 | * @since 3.0.0 |
| 3909 | * |
| 3910 | * @param array $types An array of content types. Default only contains 'comment'. |
| 3911 | */ |
| 3912 | $allowed_comment_types = apply_filters( 'get_avatar_comment_types', array( 'comment' ) ); |
| 3913 | if ( ! empty( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (array) $allowed_comment_types ) ) { |
| 3914 | $args['url'] = false; |
| 3915 | /** This filter is documented in wp-includes/link-template.php */ |
| 3916 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 3917 | } |
| 3918 | |
| 3919 | if ( ! empty( $id_or_email->user_id ) ) { |
| 3920 | $user = get_user_by( 'id', (int) $id_or_email->user_id ); |
| 3921 | } |