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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 4157 | * |
| 4158 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4159 | * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4160 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4161 | */ |
| 4162 | $args = apply_filters( 'pre_get_avatar_data', $args, $id_or_email ); |
| 4163 | |
| 4164 | if ( isset( $args['url'] ) ) { |
| 4165 | /** This filter is documented in wp-includes/link-template.php */ |
| 4166 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4167 | } |
| 4168 | |
| 4169 | $email_hash = ''; |
| 4170 | $user = false; |
| 4171 | $email = false; |
| 4172 | |
| 4173 | if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) { |
| 4174 | $id_or_email = get_comment( $id_or_email ); |
| 4175 | } |
| Line | Code |
| 4189 | // User object. |
| 4190 | $user = $id_or_email; |
| 4191 | } elseif ( $id_or_email instanceof WP_Post ) { |
| 4192 | // Post object. |
| 4193 | $user = get_user_by( 'id', (int) $id_or_email->post_author ); |
| 4194 | } elseif ( $id_or_email instanceof WP_Comment ) { |
| 4195 | if ( ! is_avatar_comment_type( get_comment_type( $id_or_email ) ) ) { |
| 4196 | $args['url'] = false; |
| 4197 | /** This filter is documented in wp-includes/link-template.php */ |
| 4198 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4199 | } |
| 4200 | |
| 4201 | if ( ! empty( $id_or_email->user_id ) ) { |
| 4202 | $user = get_user_by( 'id', (int) $id_or_email->user_id ); |
| 4203 | } |
| 4204 | if ( ( ! $user || is_wp_error( $user ) ) && ! empty( $id_or_email->comment_author_email ) ) { |
| 4205 | $email = $id_or_email->comment_author_email; |
| 4206 | } |
| 4207 | } |
| Line | Code |
| 4256 | /** |
| 4257 | * Filters the avatar data. |
| 4258 | * |
| 4259 | * @since 4.2.0 |
| 4260 | * |
| 4261 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4262 | * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4263 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4264 | */ |
| 4265 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4266 | } |
| 4267 | |
| 4268 | /** |
| 4269 | * Retrieves the URL of a file in the theme. |
| 4270 | * |
| 4271 | * Searches in the stylesheet directory before the template directory so themes |
| 4272 | * which inherit from a parent theme can just override one file. |
| 4273 | * |
| 4274 | * @since 4.7.0 |