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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 |
|---|---|
| 367 | |
| 368 | /** |
| 369 | * Filter the HTML content for navigation menus. |
| 370 | * |
| 371 | * @since 3.0.0 |
| 372 | * |
| 373 | * @param string $nav_menu The HTML content for the navigation menu. |
| 374 | * @param array $args Arguments from {@see wp_nav_menu()}. |
| 375 | */ |
| 376 | $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args ); |
| 377 | |
| 378 | if ( $args->echo ) |
| 379 | echo $nav_menu; |
| 380 | else |
| 381 | return $nav_menu; |
| 382 | } |
| 383 | |
| 384 | /** |
| 385 | * Add the class property classes for the current context, if applicable. |