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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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724 |
|
725 | /** |
726 | * Filters the columns displayed in the Posts list table. |
727 | * |
728 | * @since 1.5.0 |
729 | * |
730 | * @param string[] $post_columns An associative array of column headings. |
731 | * @param string $post_type The post type slug. |
732 | */ |
733 | $posts_columns = apply_filters( 'manage_posts_columns', $posts_columns, $post_type ); |
734 | } |
735 |
|
736 | /** |
737 | * Filters the columns displayed in the Posts list table for a specific post type. |
738 | * |
739 | * The dynamic portion of the hook name, `$post_type`, refers to the post type slug. |
740 | * |
741 | * Possible hook names include: |
742 | * |