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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 |
|---|---|
| 4302 | * |
| 4303 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4304 | * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4305 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4306 | */ |
| 4307 | $args = apply_filters( 'pre_get_avatar_data', $args, $id_or_email ); |
| 4308 | |
| 4309 | if ( isset( $args['url'] ) ) { |
| 4310 | /** This filter is documented in wp-includes/link-template.php */ |
| 4311 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4312 | } |
| 4313 | |
| 4314 | $email_hash = ''; |
| 4315 | $user = false; |
| 4316 | $email = false; |
| 4317 | |
| 4318 | if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) { |
| 4319 | $id_or_email = get_comment( $id_or_email ); |
| 4320 | } |
| Line | Code |
| 4334 | // User object. |
| 4335 | $user = $id_or_email; |
| 4336 | } elseif ( $id_or_email instanceof WP_Post ) { |
| 4337 | // Post object. |
| 4338 | $user = get_user_by( 'id', (int) $id_or_email->post_author ); |
| 4339 | } elseif ( $id_or_email instanceof WP_Comment ) { |
| 4340 | if ( ! is_avatar_comment_type( get_comment_type( $id_or_email ) ) ) { |
| 4341 | $args['url'] = false; |
| 4342 | /** This filter is documented in wp-includes/link-template.php */ |
| 4343 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4344 | } |
| 4345 | |
| 4346 | if ( ! empty( $id_or_email->user_id ) ) { |
| 4347 | $user = get_user_by( 'id', (int) $id_or_email->user_id ); |
| 4348 | } |
| 4349 | if ( ( ! $user || is_wp_error( $user ) ) && ! empty( $id_or_email->comment_author_email ) ) { |
| 4350 | $email = $id_or_email->comment_author_email; |
| 4351 | } |
| 4352 | } |
| Line | Code |
| 4401 | /** |
| 4402 | * Filters the avatar data. |
| 4403 | * |
| 4404 | * @since 4.2.0 |
| 4405 | * |
| 4406 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4407 | * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4408 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4409 | */ |
| 4410 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4411 | } |
| 4412 | |
| 4413 | /** |
| 4414 | * Retrieves the URL of a file in the theme. |
| 4415 | * |
| 4416 | * Searches in the stylesheet directory before the template directory so themes |
| 4417 | * which inherit from a parent theme can just override one file. |
| 4418 | * |
| 4419 | * @since 4.7.0 |