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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 |
|---|---|
| 167 | |
| 168 | $lastorder = $order; |
| 169 | } |
| 170 | |
| 171 | return apply_filters( 'add_menu_classes', $menu ); |
| 172 | } |
| 173 | |
| 174 | uksort($menu, "strnatcasecmp"); // make it all pretty |
| 175 | |
| 176 | if ( apply_filters('custom_menu_order', false) ) { |
| 177 | $menu_order = array(); |
| 178 | foreach ( $menu as $menu_item ) { |
| 179 | $menu_order[] = $menu_item[2]; |
| 180 | } |
| 181 | unset($menu_item); |
| 182 | $default_menu_order = $menu_order; |
| 183 | $menu_order = apply_filters('menu_order', $menu_order); |
| 184 | $menu_order = array_flip($menu_order); |
| 185 | $default_menu_order = array_flip($default_menu_order); |