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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 |
---|---|
1846 | extract(wp_unslash($commentarr), EXTR_SKIP); |
1847 |
|
1848 | /** |
1849 | * Filter the comment content before it is updated in the database. |
1850 | * |
1851 | * @since 1.5.0 |
1852 | * |
1853 | * @param string $comment_content The comment data. |
1854 | */ |
1855 | $comment_content = apply_filters( 'comment_save_pre', $comment_content ); |
1856 |
|
1857 | $comment_date_gmt = get_gmt_from_date($comment_date); |
1858 |
|
1859 | if ( !isset($comment_approved) ) |
1860 | $comment_approved = 1; |
1861 | else if ( 'hold' == $comment_approved ) |
1862 | $comment_approved = 0; |
1863 | else if ( 'approve' == $comment_approved ) |
1864 | $comment_approved = 1; |