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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 |
|---|---|
| 1260 | * |
| 1261 | * This hook only fires if the current post type is non-hierarchical, |
| 1262 | * such as posts. |
| 1263 | * |
| 1264 | * @since 1.5.0 |
| 1265 | * |
| 1266 | * @param string $column_name The name of the column to display. |
| 1267 | * @param int $post_id The current post ID. |
| 1268 | */ |
| 1269 | do_action( 'manage_posts_custom_column', $column_name, $post->ID ); |
| 1270 | } |
| 1271 | |
| 1272 | /** |
| 1273 | * Fires for each custom column of a specific post type in the Posts list table. |
| 1274 | * |
| 1275 | * The dynamic portion of the hook name, `$post->post_type`, refers to the post type. |
| 1276 | * |
| 1277 | * @since 3.1.0 |
| 1278 | * |