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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 |
|---|---|
| 913 | * Fires after the user's role has changed. |
| 914 | * |
| 915 | * @since 2.9.0 |
| 916 | * @since 3.6.0 Added $old_roles to include an array of the user's previous roles. |
| 917 | * |
| 918 | * @param int $user_id The user ID. |
| 919 | * @param string $role The new role. |
| 920 | * @param array $old_roles An array of the user's previous roles. |
| 921 | */ |
| 922 | do_action( 'set_user_role', $this->ID, $role, $old_roles ); |
| 923 | } |
| 924 | |
| 925 | /** |
| 926 | * Choose the maximum level the user has. |
| 927 | * |
| 928 | * Will compare the level from the $item parameter against the $max |
| 929 | * parameter. If the item is incorrect, then just the $max parameter value |
| 930 | * will be returned. |
| 931 | * |