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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 |
|---|---|
| 2346 | $data = wp_unslash( $commentarr ); |
| 2347 | |
| 2348 | /** |
| 2349 | * Filters the comment content before it is updated in the database. |
| 2350 | * |
| 2351 | * @since 1.5.0 |
| 2352 | * |
| 2353 | * @param string $comment_content The comment data. |
| 2354 | */ |
| 2355 | $data['comment_content'] = apply_filters( 'comment_save_pre', $data['comment_content'] ); |
| 2356 | |
| 2357 | $data['comment_date_gmt'] = get_gmt_from_date( $data['comment_date'] ); |
| 2358 | |
| 2359 | if ( ! isset( $data['comment_approved'] ) ) { |
| 2360 | $data['comment_approved'] = 1; |
| 2361 | } elseif ( 'hold' == $data['comment_approved'] ) { |
| 2362 | $data['comment_approved'] = 0; |
| 2363 | } elseif ( 'approve' == $data['comment_approved'] ) { |
| 2364 | $data['comment_approved'] = 1; |