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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 |
---|---|
236 | /** |
237 | * Filter the arguments used to display a navigation menu. |
238 | * |
239 | * @since 3.0.0 |
240 | * |
241 | * @see wp_nav_menu() |
242 | * |
243 | * @param array $args Array of wp_nav_menu() arguments. |
244 | */ |
245 | $args = apply_filters( 'wp_nav_menu_args', $args ); |
246 | $args = (object) $args; |
247 |
|
248 | /** |
249 | * Filter whether to short-circuit the wp_nav_menu() output. |
250 | * |
251 | * Returning a non-null value to the filter will short-circuit |
252 | * wp_nav_menu(), echoing that value if $args->echo is true, |
253 | * returning that value otherwise. |
254 | * |