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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.
| Line | Code |
|---|---|
| 2114 | // No avatar for pingbacks or trackbacks |
| 2115 | |
| 2116 | /** |
| 2117 | * Filter the list of allowed comment types for retrieving avatars. |
| 2118 | * |
| 2119 | * @since 3.0.0 |
| 2120 | * |
| 2121 | * @param array $types An array of content types. Default only contains 'comment'. |
| 2122 | */ |
| 2123 | $allowed_comment_types = apply_filters( 'get_avatar_comment_types', array( 'comment' ) ); |
| 2124 | if ( ! empty( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (array) $allowed_comment_types ) ) |
| 2125 | return false; |
| 2126 | |
| 2127 | if ( ! empty( $id_or_email->user_id ) ) { |
| 2128 | $id = (int) $id_or_email->user_id; |
| 2129 | $user = get_userdata($id); |
| 2130 | if ( $user ) |
| 2131 | $email = $user->user_email; |
| 2132 | } |