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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 |
|---|---|
| 260 | |
| 261 | // filters the widget admin form before displaying, return false to stop displaying it |
| 262 | $instance = apply_filters('widget_form_callback', $instance, $this); |
| 263 | |
| 264 | $return = null; |
| 265 | if ( false !== $instance ) { |
| 266 | $return = $this->form($instance); |
| 267 | // add extra fields in the widget form - be sure to set $return to null if you add any |
| 268 | // if the widget has no form the text echoed from the default form method can be hidden using css |
| 269 | do_action_ref_array( 'in_widget_form', array(&$this, &$return, $instance) ); |
| 270 | } |
| 271 | return $return; |
| 272 | } |
| 273 | |
| 274 | /** Helper function: Registers a single instance. */ |
| 275 | function _register_one($number = -1) { |
| 276 | wp_register_sidebar_widget( $this->id, $this->name, $this->_get_display_callback(), $this->widget_options, array( 'number' => $number ) ); |
| 277 | _register_widget_update_callback( $this->id_base, $this->_get_update_callback(), $this->control_options, array( 'number' => -1 ) ); |
| 278 | _register_widget_form_callback( $this->id, $this->name, $this->_get_form_callback(), $this->control_options, array( 'number' => $number ) ); |