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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 |
---|---|
598 |
|
599 | /** |
600 | * Filters the columns displayed in the Posts list table. |
601 | * |
602 | * @since 1.5.0 |
603 | * |
604 | * @param string[] $post_columns An associative array of column headings. |
605 | * @param string $post_type The post type slug. |
606 | */ |
607 | $posts_columns = apply_filters( 'manage_posts_columns', $posts_columns, $post_type ); |
608 | } |
609 |
|
610 | /** |
611 | * Filters the columns displayed in the Posts list table for a specific post type. |
612 | * |
613 | * The dynamic portion of the hook name, `$post_type`, refers to the post type slug. |
614 | * |
615 | * @since 3.0.0 |
616 | * |