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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
|---|---|
| 222 | foreach ( $settings as $number => $new_instance ) { |
| 223 | $new_instance = stripslashes_deep($new_instance); |
| 224 | $this->_set($number); |
| 225 | |
| 226 | $old_instance = isset($all_instances[$number]) ? $all_instances[$number] : array(); |
| 227 | |
| 228 | $instance = $this->update($new_instance, $old_instance); |
| 229 | |
| 230 | // filters the widget's settings before saving, return false to cancel saving (keep the old settings if updating) |
| 231 | $instance = apply_filters('widget_update_callback', $instance, $new_instance, $old_instance, $this); |
| 232 | if ( false !== $instance ) |
| 233 | $all_instances[$number] = $instance; |
| 234 | |
| 235 | break; // run only once |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | $this->save_settings($all_instances); |
| 240 | $this->updated = true; |