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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 |
|---|---|
| 2129 | */ |
| 2130 | $commentdata['comment_content'] = apply_filters( 'pre_comment_content', $commentdata['comment_content'] ); |
| 2131 | /** |
| 2132 | * Filters the comment author's IP address before it is set. |
| 2133 | * |
| 2134 | * @since 1.5.0 |
| 2135 | * |
| 2136 | * @param string $comment_author_ip The comment author's IP address. |
| 2137 | */ |
| 2138 | $commentdata['comment_author_IP'] = apply_filters( 'pre_comment_user_ip', $commentdata['comment_author_IP'] ); |
| 2139 | /** This filter is documented in wp-includes/comment.php */ |
| 2140 | $commentdata['comment_author_url'] = apply_filters( 'pre_comment_author_url', $commentdata['comment_author_url'] ); |
| 2141 | /** This filter is documented in wp-includes/comment.php */ |
| 2142 | $commentdata['comment_author_email'] = apply_filters( 'pre_comment_author_email', $commentdata['comment_author_email'] ); |
| 2143 | |
| 2144 | $commentdata['filtered'] = true; |
| 2145 | |
| 2146 | return $commentdata; |
| 2147 | } |