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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 |
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62 | /** |
63 | * Filters the arguments used to display a navigation menu. |
64 | * |
65 | * @since 3.0.0 |
66 | * |
67 | * @see wp_nav_menu() |
68 | * |
69 | * @param array $args Array of wp_nav_menu() arguments. |
70 | */ |
71 | $args = apply_filters( 'wp_nav_menu_args', $args ); |
72 | $args = (object) $args; |
73 |
|
74 | /** |
75 | * Filters whether to short-circuit the wp_nav_menu() output. |
76 | * |
77 | * Returning a non-null value to the filter will short-circuit |
78 | * wp_nav_menu(), echoing that value if $args->echo is true, |
79 | * returning that value otherwise. |
80 | * |