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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 |
---|---|
457 | /** |
458 | * Filter the columns displayed in the Posts list table for a specific post type. |
459 | * |
460 | * The dynamic portion of the hook name, `$post_type`, refers to the post type slug. |
461 | * |
462 | * @since 3.0.0 |
463 | * |
464 | * @param array $post_columns An array of column names. |
465 | */ |
466 | return apply_filters( "manage_{$post_type}_posts_columns", $posts_columns ); |
467 | } |
468 |
|
469 | /** |
470 | * |
471 | * @return array |
472 | */ |
473 | protected function get_sortable_columns() { |
474 | return array( |
475 | 'title' => 'title', |