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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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659 |
|
660 | /** |
661 | * Filters the columns displayed in the Posts list table. |
662 | * |
663 | * @since 1.5.0 |
664 | * |
665 | * @param string[] $post_columns An associative array of column headings. |
666 | * @param string $post_type The post type slug. |
667 | */ |
668 | $posts_columns = apply_filters( 'manage_posts_columns', $posts_columns, $post_type ); |
669 | } |
670 |
|
671 | /** |
672 | * Filters the columns displayed in the Posts list table for a specific post type. |
673 | * |
674 | * The dynamic portion of the hook name, `$post_type`, refers to the post type slug. |
675 | * |
676 | * @since 3.0.0 |
677 | * |