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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 | * |