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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 |
|---|---|
| 842 | foreach ( (array) $wp_registered_widgets[$id]['classname'] as $cn ) { |
| 843 | if ( is_string($cn) ) |
| 844 | $classname_ .= '_' . $cn; |
| 845 | elseif ( is_object($cn) ) |
| 846 | $classname_ .= '_' . get_class($cn); |
| 847 | } |
| 848 | $classname_ = ltrim($classname_, '_'); |
| 849 | $params[0]['before_widget'] = sprintf($params[0]['before_widget'], $id, $classname_); |
| 850 | |
| 851 | $params = apply_filters( 'dynamic_sidebar_params', $params ); |
| 852 | |
| 853 | $callback = $wp_registered_widgets[$id]['callback']; |
| 854 | |
| 855 | if ( is_callable($callback) ) { |
| 856 | call_user_func_array($callback, $params); |
| 857 | $did_one = true; |
| 858 | } |
| 859 | } |
| 860 | |