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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 |
|---|---|
| 208 | * @param stdClass $args An object of wp_nav_menu() arguments. |
| 209 | * @param int $depth Depth of menu item. Used for padding. |
| 210 | */ |
| 211 | $li_atts = apply_filters( 'nav_menu_item_attributes', $li_atts, $menu_item, $args, $depth ); |
| 212 | $li_attributes = $this->build_atts( $li_atts ); |
| 213 | |
| 214 | $output .= $indent . '<li' . $li_attributes . '>'; |
| 215 | |
| 216 | /** This filter is documented in wp-includes/post-template.php */ |
| 217 | $title = apply_filters( 'the_title', $menu_item->title, $menu_item->ID ); |
| 218 | |
| 219 | // Save filtered value before filtering again. |
| 220 | $the_title_filtered = $title; |
| 221 | |
| 222 | /** |
| 223 | * Filters a menu item's title. |
| 224 | * |
| 225 | * @since 4.4.0 |
| 226 | * |