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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 |
---|---|
368 | /** |
369 | * Fires inside the auxiliary 'Actions' column of the Sites list table. |
370 | * |
371 | * By default this column is hidden unless something is hooked to the action. |
372 | * |
373 | * @since MU |
374 | * |
375 | * @param int $blog_id The site ID. |
376 | */ |
377 | do_action( 'wpmublogsaction', $blog['blog_id'] ); ?> |
378 | </td> |
379 | <?php } |
380 | break; |
381 |
|
382 | default: |
383 | echo "<td class='$column_name column-$column_name'$style>"; |
384 | /** |
385 | * Fires for each registered custom column in the Sites list table. |
386 | * |