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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 |
|---|---|
| 223 | $items = apply_filters( 'wp_nav_menu_items', $items, $args ); |
| 224 | $items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args ); |
| 225 | |
| 226 | $nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items ); |
| 227 | unset( $items ); |
| 228 | |
| 229 | if ( $show_container ) |
| 230 | $nav_menu .= '</' . $args->container . '>'; |
| 231 | |
| 232 | $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args ); |
| 233 | |
| 234 | if ( $args->echo ) |
| 235 | echo $nav_menu; |
| 236 | else |
| 237 | return $nav_menu; |
| 238 | } |
| 239 | |
| 240 | /** |
| 241 | * Add the class property classes for the current context, if applicable. |