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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 |
---|---|
733 | * |
734 | * @since 2.0.0 |
735 | * @since 3.7.0 Added the user object. |
736 | * |
737 | * @param array $allcaps An array of all the user's capabilities. |
738 | * @param array $caps Actual capabilities for meta capability. |
739 | * @param array $args Optional parameters passed to has_cap(), typically object ID. |
740 | * @param WP_User $user The user object. |
741 | */ |
742 | $capabilities = apply_filters( 'user_has_cap', $this->allcaps, $caps, $args, $this ); |
743 |
|
744 | // Everyone is allowed to exist. |
745 | $capabilities['exist'] = true; |
746 |
|
747 | // Nobody is allowed to do things they are not allowed to do. |
748 | unset( $capabilities['do_not_allow'] ); |
749 |
|
750 | // Must have ALL requested caps. |
751 | foreach ( (array) $caps as $cap ) { |