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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 |
|---|---|
| 454 | /** |
| 455 | * Filter the display output of custom columns in the Users list table. |
| 456 | * |
| 457 | * @since 2.8.0 |
| 458 | * |
| 459 | * @param string $output Custom column output. Default empty. |
| 460 | * @param string $column_name Column name. |
| 461 | * @param int $user_id ID of the currently-listed user. |
| 462 | */ |
| 463 | $r .= apply_filters( 'manage_users_custom_column', '', $column_name, $user_object->ID ); |
| 464 | } |
| 465 | |
| 466 | if ( $primary === $column_name ) { |
| 467 | $r .= $this->row_actions( $actions ); |
| 468 | } |
| 469 | $r .= "</td>"; |
| 470 | } |
| 471 | } |
| 472 | $r .= '</tr>'; |