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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 |
---|---|
253 | // We echo out a form where 'number' can be set later |
254 | $this->_set('__i__'); |
255 | $instance = array(); |
256 | } else { |
257 | $this->_set($widget_args['number']); |
258 | $instance = $all_instances[ $widget_args['number'] ]; |
259 | } |
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; |