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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 |
|---|---|
| 181 | * Care should be taken to protect the email address and assure that email |
| 182 | * harvesters do not capture your commenter's email address. |
| 183 | * |
| 184 | * @since 1.2.0 |
| 185 | * @since 4.1.0 The `$comment` parameter was added. |
| 186 | * |
| 187 | * @param string $comment_author_email The comment author's email address. |
| 188 | * @param WP_Comment $comment The comment object. |
| 189 | */ |
| 190 | $email = apply_filters( 'comment_email', $comment->comment_author_email, $comment ); |
| 191 | |
| 192 | if ((!empty($email)) && ($email != '@')) { |
| 193 | $display = ($linktext != '') ? $linktext : $email; |
| 194 | $return = $before; |
| 195 | $return .= sprintf( '<a href="%1$s">%2$s</a>', esc_url( 'mailto:' . $email ), esc_html( $display ) ); |
| 196 | $return .= $after; |
| 197 | return $return; |
| 198 | } else { |
| 199 | return ''; |