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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 |
|---|---|
| 734 | * |
| 735 | * @since 2.0.0 |
| 736 | * @since 3.7.0 Added the user object. |
| 737 | * |
| 738 | * @param array $allcaps An array of all the user's capabilities. |
| 739 | * @param array $caps Actual capabilities for meta capability. |
| 740 | * @param array $args Optional parameters passed to has_cap(), typically object ID. |
| 741 | * @param WP_User $user The user object. |
| 742 | */ |
| 743 | $capabilities = apply_filters( 'user_has_cap', $this->allcaps, $caps, $args, $this ); |
| 744 | |
| 745 | // Everyone is allowed to exist. |
| 746 | $capabilities['exist'] = true; |
| 747 | |
| 748 | // Must have ALL requested caps. |
| 749 | foreach ( (array) $caps as $cap ) { |
| 750 | if ( empty( $capabilities[ $cap ] ) ) |
| 751 | return false; |
| 752 | } |