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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 |
|---|---|
| 4444 | * |
| 4445 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4446 | * @param mixed $id_or_email The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4447 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4448 | */ |
| 4449 | $args = apply_filters( 'pre_get_avatar_data', $args, $id_or_email ); |
| 4450 | |
| 4451 | if ( isset( $args['url'] ) ) { |
| 4452 | /** This filter is documented in wp-includes/link-template.php */ |
| 4453 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4454 | } |
| 4455 | |
| 4456 | $email_hash = ''; |
| 4457 | $user = false; |
| 4458 | $email = false; |
| 4459 | |
| 4460 | if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) { |
| 4461 | $id_or_email = get_comment( $id_or_email ); |
| 4462 | } |
| Line | Code |
| 4476 | // User object. |
| 4477 | $user = $id_or_email; |
| 4478 | } elseif ( $id_or_email instanceof WP_Post ) { |
| 4479 | // Post object. |
| 4480 | $user = get_user_by( 'id', (int) $id_or_email->post_author ); |
| 4481 | } elseif ( $id_or_email instanceof WP_Comment ) { |
| 4482 | if ( ! is_avatar_comment_type( get_comment_type( $id_or_email ) ) ) { |
| 4483 | $args['url'] = false; |
| 4484 | /** This filter is documented in wp-includes/link-template.php */ |
| 4485 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4486 | } |
| 4487 | |
| 4488 | if ( ! empty( $id_or_email->user_id ) ) { |
| 4489 | $user = get_user_by( 'id', (int) $id_or_email->user_id ); |
| 4490 | } |
| 4491 | if ( ( ! $user || is_wp_error( $user ) ) && ! empty( $id_or_email->comment_author_email ) ) { |
| 4492 | $email = $id_or_email->comment_author_email; |
| 4493 | } |
| 4494 | } |
| Line | Code |
| 4543 | /** |
| 4544 | * Filters the avatar data. |
| 4545 | * |
| 4546 | * @since 4.2.0 |
| 4547 | * |
| 4548 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4549 | * @param mixed $id_or_email The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash, |
| 4550 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4551 | */ |
| 4552 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4553 | } |
| 4554 | |
| 4555 | /** |
| 4556 | * Retrieves the URL of a file in the theme. |
| 4557 | * |
| 4558 | * Searches in the stylesheet directory before the template directory so themes |
| 4559 | * which inherit from a parent theme can just override one file. |
| 4560 | * |
| 4561 | * @since 4.7.0 |