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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 |
---|---|
369 | echo "<td class='$column_name column-$column_name'$style>"; |
370 | /** |
371 | * Fires for each registered custom column in the Sites list table. |
372 | * |
373 | * @since 3.1.0 |
374 | * |
375 | * @param string $column_name The name of the column to display. |
376 | * @param int $blog_id The site ID. |
377 | */ |
378 | do_action( 'manage_sites_custom_column', $column_name, $blog['blog_id'] ); |
379 | echo "</td>"; |
380 | break; |
381 | } |
382 | } |
383 | ?> |
384 | </tr> |
385 | <?php |
386 | } |
387 | } |