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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 |
|---|---|
| 646 | * Fires after the user's role has changed. |
| 647 | * |
| 648 | * @since 2.9.0 |
| 649 | * @since 3.6.0 Added $old_roles to include an array of the user's previous roles. |
| 650 | * |
| 651 | * @param int $user_id The user ID. |
| 652 | * @param string $role The new role. |
| 653 | * @param string[] $old_roles An array of the user's previous roles. |
| 654 | */ |
| 655 | do_action( 'set_user_role', $this->ID, $role, $old_roles ); |
| 656 | } |
| 657 | |
| 658 | /** |
| 659 | * Chooses the maximum level the user has. |
| 660 | * |
| 661 | * Will compare the level from the $item parameter against the $max |
| 662 | * parameter. If the item is incorrect, then just the $max parameter value |
| 663 | * will be returned. |
| 664 | * |