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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 |
|---|---|
| 879 | foreach ( (array) $wp_registered_widgets[$id]['classname'] as $cn ) { |
| 880 | if ( is_string($cn) ) |
| 881 | $classname_ .= '_' . $cn; |
| 882 | elseif ( is_object($cn) ) |
| 883 | $classname_ .= '_' . get_class($cn); |
| 884 | } |
| 885 | $classname_ = ltrim($classname_, '_'); |
| 886 | $params[0]['before_widget'] = sprintf($params[0]['before_widget'], $id, $classname_); |
| 887 | |
| 888 | $params = apply_filters( 'dynamic_sidebar_params', $params ); |
| 889 | |
| 890 | $callback = $wp_registered_widgets[$id]['callback']; |
| 891 | |
| 892 | do_action( 'dynamic_sidebar', $wp_registered_widgets[$id] ); |
| 893 | |
| 894 | if ( is_callable($callback) ) { |
| 895 | call_user_func_array($callback, $params); |
| 896 | $did_one = true; |
| 897 | } |