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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 |
|---|---|
| 273 | * Filters the HTML content for navigation menus. |
| 274 | * |
| 275 | * @since 3.0.0 |
| 276 | * |
| 277 | * @see wp_nav_menu() |
| 278 | * |
| 279 | * @param string $nav_menu The HTML content for the navigation menu. |
| 280 | * @param stdClass $args An object containing wp_nav_menu() arguments. |
| 281 | */ |
| 282 | $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args ); |
| 283 | |
| 284 | if ( $args->echo ) { |
| 285 | echo $nav_menu; |
| 286 | } else { |
| 287 | return $nav_menu; |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | /** |