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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 |
---|---|
952 | * |
953 | * This hook only fires if the current post type is hierarchical, |
954 | * such as pages. |
955 | * |
956 | * @since 2.5.0 |
957 | * |
958 | * @param string $column_name The name of the column to display. |
959 | * @param int $post_id The current post ID. |
960 | */ |
961 | do_action( 'manage_pages_custom_column', $column_name, $post->ID ); |
962 | } else { |
963 |
|
964 | /** |
965 | * Fires in each custom column in the Posts list table. |
966 | * |
967 | * This hook only fires if the current post type is non-hierarchical, |
968 | * such as posts. |
969 | * |
970 | * @since 1.5.0 |