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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 |
|---|---|
| 477 | 'blogname' => $blogname_columns, |
| 478 | 'lastupdated' => __( 'Last Updated'), |
| 479 | 'registered' => _x( 'Registered', 'site' ), |
| 480 | 'users' => __( 'Users' ) |
| 481 | ); |
| 482 | |
| 483 | if ( has_filter( 'wpmublogsaction' ) ) |
| 484 | $sites_columns['plugins'] = __( 'Actions' ); |
| 485 | |
| 486 | $sites_columns = apply_filters( 'wpmu_blogs_columns', $sites_columns ); |
| 487 | ?> |
| 488 | |
| 489 | <table class="widefat"> |
| 490 | <thead> |
| 491 | <tr> |
| 492 | <th class="manage-column column-cb check-column" id="cb" scope="col"> |
| 493 | <input type="checkbox" /> |
| 494 | </th> |
| 495 | <?php |