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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 |
|---|---|
| 1829 | extract(wp_unslash($commentarr), EXTR_SKIP); |
| 1830 | |
| 1831 | /** |
| 1832 | * Filter the comment content before it is updated in the database. |
| 1833 | * |
| 1834 | * @since 1.5.0 |
| 1835 | * |
| 1836 | * @param string $comment_content The comment data. |
| 1837 | */ |
| 1838 | $comment_content = apply_filters( 'comment_save_pre', $comment_content ); |
| 1839 | |
| 1840 | $comment_date_gmt = get_gmt_from_date($comment_date); |
| 1841 | |
| 1842 | if ( !isset($comment_approved) ) |
| 1843 | $comment_approved = 1; |
| 1844 | else if ( 'hold' == $comment_approved ) |
| 1845 | $comment_approved = 0; |
| 1846 | else if ( 'approve' == $comment_approved ) |
| 1847 | $comment_approved = 1; |