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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 |
|---|---|
| 126 | ); |
| 127 | /** |
| 128 | * Filter the columns displayed in the Network Admin Users list table. |
| 129 | * |
| 130 | * @since MU |
| 131 | * |
| 132 | * @param array $users_columns An array of user columns. Default 'cb', 'username', |
| 133 | * 'name', 'email', 'registered', 'blogs'. |
| 134 | */ |
| 135 | $users_columns = apply_filters( 'wpmu_users_columns', $users_columns ); |
| 136 | |
| 137 | return $users_columns; |
| 138 | } |
| 139 | |
| 140 | protected function get_sortable_columns() { |
| 141 | return array( |
| 142 | 'username' => 'login', |
| 143 | 'name' => 'name', |
| 144 | 'email' => 'email', |