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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 |
|---|---|
| 243 | if ( empty( $items ) ) |
| 244 | return false; |
| 245 | |
| 246 | $nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items ); |
| 247 | unset( $items ); |
| 248 | |
| 249 | if ( $show_container ) |
| 250 | $nav_menu .= '</' . $args->container . '>'; |
| 251 | |
| 252 | $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args ); |
| 253 | |
| 254 | if ( $args->echo ) |
| 255 | echo $nav_menu; |
| 256 | else |
| 257 | return $nav_menu; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Add the class property classes for the current context, if applicable. |