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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 |
|---|---|
| 2058 | |
| 2059 | /** |
| 2060 | * Filters the comment moderation email subject. |
| 2061 | * |
| 2062 | * @since 1.5.2 |
| 2063 | * |
| 2064 | * @param string $subject Subject of the comment moderation email. |
| 2065 | * @param int $comment_id Comment ID. |
| 2066 | */ |
| 2067 | $subject = apply_filters( 'comment_moderation_subject', $subject, $comment_id ); |
| 2068 | |
| 2069 | wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers ); |
| 2070 | |
| 2071 | if ( $switched_locale ) { |
| 2072 | restore_previous_locale(); |
| 2073 | } |
| 2074 | } |
| 2075 | |
| 2076 | return true; |