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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 |
---|---|
234 | /** |
235 | * Filter the arguments used to display a navigation menu. |
236 | * |
237 | * @since 3.0.0 |
238 | * |
239 | * @see wp_nav_menu() |
240 | * |
241 | * @param array $args Array of wp_nav_menu() arguments. |
242 | */ |
243 | $args = apply_filters( 'wp_nav_menu_args', $args ); |
244 | $args = (object) $args; |
245 |
|
246 | /** |
247 | * Filter whether to short-circuit the wp_nav_menu() output. |
248 | * |
249 | * Returning a non-null value to the filter will short-circuit |
250 | * wp_nav_menu(), echoing that value if $args->echo is true, |
251 | * returning that value otherwise. |
252 | * |