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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 |
|---|---|
| 567 | } |
| 568 | |
| 569 | /** This filter is documented in wp-includes/nav-menu.php */ |
| 570 | $post->attr_title = apply_filters( 'nav_menu_attr_title', $post->attr_title ); |
| 571 | |
| 572 | /** This filter is documented in wp-includes/nav-menu.php */ |
| 573 | $post->description = apply_filters( 'nav_menu_description', wp_trim_words( $post->description, 200 ) ); |
| 574 | |
| 575 | /** This filter is documented in wp-includes/nav-menu.php */ |
| 576 | $post = apply_filters( 'wp_setup_nav_menu_item', $post ); |
| 577 | |
| 578 | return $post; |
| 579 | } |
| 580 | |
| 581 | /** |
| 582 | * Sanitize an input. |
| 583 | * |
| 584 | * Note that parent::sanitize() erroneously does wp_unslash() on $value, but |
| 585 | * we remove that in this override. |