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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 |
---|---|
88 | /** |
89 | * Filters the arguments used to display a navigation menu. |
90 | * |
91 | * @since 3.0.0 |
92 | * |
93 | * @see wp_nav_menu() |
94 | * |
95 | * @param array $args Array of wp_nav_menu() arguments. |
96 | */ |
97 | $args = apply_filters( 'wp_nav_menu_args', $args ); |
98 | $args = (object) $args; |
99 |
|
100 | /** |
101 | * Filters whether to short-circuit the wp_nav_menu() output. |
102 | * |
103 | * Returning a non-null value from the filter will short-circuit wp_nav_menu(), |
104 | * echoing that value if $args->echo is true, returning that value otherwise. |
105 | * |
106 | * @since 3.9.0 |