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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 |
|---|---|
| 208 | global $comment_status, $comment_type; |
| 209 | ?> |
| 210 | <div class="alignleft actions"> |
| 211 | <?php |
| 212 | if ( 'top' == $which ) { |
| 213 | ?> |
| 214 | <select name="comment_type"> |
| 215 | <option value=""><?php _e( 'Show all comment types' ); ?></option> |
| 216 | <?php |
| 217 | $comment_types = apply_filters( 'admin_comment_types_dropdown', array( |
| 218 | 'comment' => __( 'Comments' ), |
| 219 | 'pings' => __( 'Pings' ), |
| 220 | ) ); |
| 221 | |
| 222 | foreach ( $comment_types as $type => $label ) |
| 223 | echo "\t<option value='" . esc_attr( $type ) . "'" . selected( $comment_type, $type, false ) . ">$label</option>\n"; |
| 224 | ?> |
| 225 | </select> |
| 226 | <?php |