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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 |
---|---|
3364 | * request's cookies, if available. |
3365 | * |
3366 | * Returning a value of false will effectively short-circuit setting |
3367 | * the current user. |
3368 | * |
3369 | * @since 3.9.0 |
3370 | * |
3371 | * @param int|false $user_id User ID if one has been determined, false otherwise. |
3372 | */ |
3373 | $user_id = apply_filters( 'determine_current_user', false ); |
3374 | if ( ! $user_id ) { |
3375 | wp_set_current_user( 0 ); |
3376 | return $current_user; |
3377 | } |
3378 |
|
3379 | wp_set_current_user( $user_id ); |
3380 |
|
3381 | return $current_user; |
3382 | } |