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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 |
|---|---|
| 386 | echo "<td class='$column_name column-$column_name'$style>"; |
| 387 | /** |
| 388 | * Fires for each registered custom column in the Sites list table. |
| 389 | * |
| 390 | * @since 3.1.0 |
| 391 | * |
| 392 | * @param string $column_name The name of the column to display. |
| 393 | * @param int $blog_id The site ID. |
| 394 | */ |
| 395 | do_action( 'manage_sites_custom_column', $column_name, $blog['blog_id'] ); |
| 396 | echo "</td>"; |
| 397 | break; |
| 398 | } |
| 399 | } |
| 400 | ?> |
| 401 | </tr> |
| 402 | <?php |
| 403 | } |
| 404 | } |