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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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178 |
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179 | /** |
180 | * Filters whether a nav menu is assigned to the specified location. |
181 | * |
182 | * @since 4.3.0 |
183 | * |
184 | * @param bool $has_nav_menu Whether there is a menu assigned to a location. |
185 | * @param string $location Menu location. |
186 | */ |
187 | return apply_filters( 'has_nav_menu', $has_nav_menu, $location ); |
188 | } |
189 |
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190 | /** |
191 | * Returns the name of a navigation menu. |
192 | * |
193 | * @since 4.9.0 |
194 | * |
195 | * @param string $location Menu location identifier. |
196 | * @return string Menu name. |