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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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235 |
|
236 | /** |
237 | * Filters the displayed site columns in Sites list table. |
238 | * |
239 | * @since MU (3.0.0) |
240 | * |
241 | * @param array $sites_columns An array of displayed site columns. Default 'cb', |
242 | * 'blogname', 'lastupdated', 'registered', 'users'. |
243 | */ |
244 | return apply_filters( 'wpmu_blogs_columns', $sites_columns ); |
245 | } |
246 |
|
247 | /** |
248 | * @return array |
249 | */ |
250 | protected function get_sortable_columns() { |
251 | return array( |
252 | 'blogname' => 'blogname', |
253 | 'lastupdated' => 'lastupdated', |