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