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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 |
|---|---|
| 4247 | * |
| 4248 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4249 | * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4250 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4251 | */ |
| 4252 | $args = apply_filters( 'pre_get_avatar_data', $args, $id_or_email ); |
| 4253 | |
| 4254 | if ( isset( $args['url'] ) ) { |
| 4255 | /** This filter is documented in wp-includes/link-template.php */ |
| 4256 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4257 | } |
| 4258 | |
| 4259 | $email_hash = ''; |
| 4260 | $user = false; |
| 4261 | $email = false; |
| 4262 | |
| 4263 | if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) { |
| 4264 | $id_or_email = get_comment( $id_or_email ); |
| 4265 | } |
| Line | Code |
| 4279 | // User object. |
| 4280 | $user = $id_or_email; |
| 4281 | } elseif ( $id_or_email instanceof WP_Post ) { |
| 4282 | // Post object. |
| 4283 | $user = get_user_by( 'id', (int) $id_or_email->post_author ); |
| 4284 | } elseif ( $id_or_email instanceof WP_Comment ) { |
| 4285 | if ( ! is_avatar_comment_type( get_comment_type( $id_or_email ) ) ) { |
| 4286 | $args['url'] = false; |
| 4287 | /** This filter is documented in wp-includes/link-template.php */ |
| 4288 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4289 | } |
| 4290 | |
| 4291 | if ( ! empty( $id_or_email->user_id ) ) { |
| 4292 | $user = get_user_by( 'id', (int) $id_or_email->user_id ); |
| 4293 | } |
| 4294 | if ( ( ! $user || is_wp_error( $user ) ) && ! empty( $id_or_email->comment_author_email ) ) { |
| 4295 | $email = $id_or_email->comment_author_email; |
| 4296 | } |
| 4297 | } |
| Line | Code |
| 4346 | /** |
| 4347 | * Filters the avatar data. |
| 4348 | * |
| 4349 | * @since 4.2.0 |
| 4350 | * |
| 4351 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4352 | * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4353 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4354 | */ |
| 4355 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4356 | } |
| 4357 | |
| 4358 | /** |
| 4359 | * Retrieves the URL of a file in the theme. |
| 4360 | * |
| 4361 | * Searches in the stylesheet directory before the template directory so themes |
| 4362 | * which inherit from a parent theme can just override one file. |
| 4363 | * |
| 4364 | * @since 4.7.0 |