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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 |
|---|---|
| 220 | |
| 221 | $approved = apply_filters('pre_comment_approved', $approved); |
| 222 | return $approved; |
| 223 | } |
| 224 | |
| 225 | |
| 226 | function wp_blacklist_check($author, $email, $url, $comment, $user_ip, $user_agent) { |
| 227 | global $wpdb; |
| 228 | |
| 229 | do_action('wp_blacklist_check', $author, $email, $url, $comment, $user_ip, $user_agent); |
| 230 | |
| 231 | if ( preg_match_all('/&#(\d+);/', $comment . $author . $url, $chars) ) { |
| 232 | foreach ( (array) $chars[1] as $char ) { |
| 233 | // If it's an encoded char in the normal ASCII set, reject |
| 234 | if ( 38 == $char ) |
| 235 | continue; // Unless it's & |
| 236 | if ( $char < 128 ) |
| 237 | return true; |
| 238 | } |