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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 |
|---|---|
| 202 | ); |
| 203 | /** |
| 204 | * Filters the columns displayed in the Network Admin Users list table. |
| 205 | * |
| 206 | * @since MU (3.0.0) |
| 207 | * |
| 208 | * @param string[] $users_columns An array of user columns. Default 'cb', 'username', |
| 209 | * 'name', 'email', 'registered', 'blogs'. |
| 210 | */ |
| 211 | return apply_filters( 'wpmu_users_columns', $users_columns ); |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * @return array |
| 216 | */ |
| 217 | protected function get_sortable_columns() { |
| 218 | return array( |
| 219 | 'username' => 'login', |
| 220 | 'name' => 'name', |