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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 |
|---|---|
| 4406 | * |
| 4407 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4408 | * @param mixed $id_or_email The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4409 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4410 | */ |
| 4411 | $args = apply_filters( 'pre_get_avatar_data', $args, $id_or_email ); |
| 4412 | |
| 4413 | if ( isset( $args['url'] ) ) { |
| 4414 | /** This filter is documented in wp-includes/link-template.php */ |
| 4415 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4416 | } |
| 4417 | |
| 4418 | $email_hash = ''; |
| 4419 | $user = false; |
| 4420 | $email = false; |
| 4421 | |
| 4422 | if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) { |
| 4423 | $id_or_email = get_comment( $id_or_email ); |
| 4424 | } |
| Line | Code |
| 4438 | // User object. |
| 4439 | $user = $id_or_email; |
| 4440 | } elseif ( $id_or_email instanceof WP_Post ) { |
| 4441 | // Post object. |
| 4442 | $user = get_user_by( 'id', (int) $id_or_email->post_author ); |
| 4443 | } elseif ( $id_or_email instanceof WP_Comment ) { |
| 4444 | if ( ! is_avatar_comment_type( get_comment_type( $id_or_email ) ) ) { |
| 4445 | $args['url'] = false; |
| 4446 | /** This filter is documented in wp-includes/link-template.php */ |
| 4447 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4448 | } |
| 4449 | |
| 4450 | if ( ! empty( $id_or_email->user_id ) ) { |
| 4451 | $user = get_user_by( 'id', (int) $id_or_email->user_id ); |
| 4452 | } |
| 4453 | if ( ( ! $user || is_wp_error( $user ) ) && ! empty( $id_or_email->comment_author_email ) ) { |
| 4454 | $email = $id_or_email->comment_author_email; |
| 4455 | } |
| 4456 | } |
| Line | Code |
| 4505 | /** |
| 4506 | * Filters the avatar data. |
| 4507 | * |
| 4508 | * @since 4.2.0 |
| 4509 | * |
| 4510 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4511 | * @param mixed $id_or_email The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4512 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4513 | */ |
| 4514 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4515 | } |
| 4516 | |
| 4517 | /** |
| 4518 | * Retrieves the URL of a file in the theme. |
| 4519 | * |
| 4520 | * Searches in the stylesheet directory before the template directory so themes |
| 4521 | * which inherit from a parent theme can just override one file. |
| 4522 | * |
| 4523 | * @since 4.7.0 |