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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 |
|---|---|
| 371 | /** |
| 372 | * Fires inside the auxiliary 'Actions' column of the Sites list table. |
| 373 | * |
| 374 | * By default this column is hidden unless something is hooked to the action. |
| 375 | * |
| 376 | * @since MU |
| 377 | * |
| 378 | * @param int $blog_id The site ID. |
| 379 | */ |
| 380 | do_action( 'wpmublogsaction', $blog['blog_id'] ); ?> |
| 381 | </td> |
| 382 | <?php } |
| 383 | break; |
| 384 | |
| 385 | default: |
| 386 | echo "<td class='$column_name column-$column_name'$style>"; |
| 387 | /** |
| 388 | * Fires for each registered custom column in the Sites list table. |
| 389 | * |