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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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172 |
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173 | /** |
174 | * Filter whether a nav menu is assigned to the specified location. |
175 | * |
176 | * @since 4.3.0 |
177 | * |
178 | * @param bool $has_nav_menu Whether there is a menu assigned to a location. |
179 | * @param string $location Menu location. |
180 | */ |
181 | return apply_filters( 'has_nav_menu', $has_nav_menu, $location ); |
182 | } |
183 |
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184 | /** |
185 | * Determines whether the given ID is a nav menu item. |
186 | * |
187 | * @since 3.0.0 |
188 | * |
189 | * @param int $menu_item_id The ID of the potential nav menu item. |
190 | * @return bool Whether the given ID is that of a nav menu item. |