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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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110 | * request's cookies, if available. |
111 | * |
112 | * Returning a value of false will effectively short-circuit setting |
113 | * the current user. |
114 | * |
115 | * @since 3.9.0 |
116 | * |
117 | * @param int|bool $user_id User ID if one has been determined, false otherwise. |
118 | */ |
119 | $user_id = apply_filters( 'determine_current_user', false ); |
120 | if ( ! $user_id ) { |
121 | wp_set_current_user( 0 ); |
122 | return false; |
123 | } |
124 |
|
125 | wp_set_current_user( $user_id ); |
126 | } |
127 | endif; |
128 |
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