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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 |
|---|---|
| 39 | function check_comment( $author, $email, $url, $comment, $user_ip, $user_agent, $comment_type ) { |
| 40 | global $wpdb; |
| 41 | |
| 42 | // If manual moderation is enabled, skip all checks and return false. |
| 43 | if ( 1 == get_option( 'comment_moderation' ) ) { |
| 44 | return false; |
| 45 | } |
| 46 | |
| 47 | /** This filter is documented in wp-includes/comment-template.php */ |
| 48 | $comment = apply_filters( 'comment_text', $comment, null, array() ); |
| 49 | |
| 50 | // Check for the number of external links if a max allowed number is set. |
| 51 | if ( $max_links = get_option( 'comment_max_links' ) ) { |
| 52 | $num_links = preg_match_all( '/<a [^>]*href/i', $comment, $out ); |
| 53 | |
| 54 | /** |
| 55 | * Filters the number of links found in a comment. |
| 56 | * |
| 57 | * @since 3.0.0 |