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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 |
|---|---|
| 185 | |
| 186 | /** |
| 187 | * Filters whether a nav menu is assigned to the specified location. |
| 188 | * |
| 189 | * @since 4.3.0 |
| 190 | * |
| 191 | * @param bool $has_nav_menu Whether there is a menu assigned to a location. |
| 192 | * @param string $location Menu location. |
| 193 | */ |
| 194 | return apply_filters( 'has_nav_menu', $has_nav_menu, $location ); |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * Returns the name of a navigation menu. |
| 199 | * |
| 200 | * @since 4.9.0 |
| 201 | * |
| 202 | * @param string $location Menu location identifier. |
| 203 | * @return string Menu name. |