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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 |
|---|---|
| 1821 | |
| 1822 | /** |
| 1823 | * Filters the comment moderation email subject. |
| 1824 | * |
| 1825 | * @since 1.5.2 |
| 1826 | * |
| 1827 | * @param string $subject Subject of the comment moderation email. |
| 1828 | * @param int $comment_id Comment ID. |
| 1829 | */ |
| 1830 | $subject = apply_filters( 'comment_moderation_subject', $subject, $comment_id ); |
| 1831 | |
| 1832 | /** |
| 1833 | * Filters the comment moderation email headers. |
| 1834 | * |
| 1835 | * @since 2.8.0 |
| 1836 | * |
| 1837 | * @param string $message_headers Headers for the comment moderation email. |
| 1838 | * @param int $comment_id Comment ID. |
| 1839 | */ |