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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 |
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198 | ); |
199 | /** |
200 | * Filters the columns displayed in the Network Admin Users list table. |
201 | * |
202 | * @since MU (3.0.0) |
203 | * |
204 | * @param string[] $users_columns An array of user columns. Default 'cb', 'username', |
205 | * 'name', 'email', 'registered', 'blogs'. |
206 | */ |
207 | return apply_filters( 'wpmu_users_columns', $users_columns ); |
208 | } |
209 |
|
210 | /** |
211 | * @return array |
212 | */ |
213 | protected function get_sortable_columns() { |
214 | return array( |
215 | 'username' => 'login', |
216 | 'name' => 'name', |