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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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370 |
|
371 | /** |
372 | * Filters the displayed site columns in Sites list table. |
373 | * |
374 | * @since MU (3.0.0) |
375 | * |
376 | * @param string[] $sites_columns An array of displayed site columns. Default 'cb', |
377 | * 'blogname', 'lastupdated', 'registered', 'users'. |
378 | */ |
379 | return apply_filters( 'wpmu_blogs_columns', $sites_columns ); |
380 | } |
381 |
|
382 | /** |
383 | * @return array |
384 | */ |
385 | protected function get_sortable_columns() { |
386 | return array( |
387 | 'blogname' => 'blogname', |
388 | 'lastupdated' => 'lastupdated', |