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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 |
---|---|
2759 | * request's cookies, if available. |
2760 | * |
2761 | * Returning a value of false will effectively short-circuit setting |
2762 | * the current user. |
2763 | * |
2764 | * @since 3.9.0 |
2765 | * |
2766 | * @param int|bool $user_id User ID if one has been determined, false otherwise. |
2767 | */ |
2768 | $user_id = apply_filters( 'determine_current_user', false ); |
2769 | if ( ! $user_id ) { |
2770 | wp_set_current_user( 0 ); |
2771 | return $current_user; |
2772 | } |
2773 |
|
2774 | wp_set_current_user( $user_id ); |
2775 |
|
2776 | return $current_user; |
2777 | } |