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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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246 |
|
247 | /** |
248 | * Filters the displayed site columns in Sites list table. |
249 | * |
250 | * @since MU (3.0.0) |
251 | * |
252 | * @param string[] $sites_columns An array of displayed site columns. Default 'cb', |
253 | * 'blogname', 'lastupdated', 'registered', 'users'. |
254 | */ |
255 | return apply_filters( 'wpmu_blogs_columns', $sites_columns ); |
256 | } |
257 |
|
258 | /** |
259 | * @return array |
260 | */ |
261 | protected function get_sortable_columns() { |
262 | return array( |
263 | 'blogname' => 'blogname', |
264 | 'lastupdated' => 'lastupdated', |