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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 |
|---|---|
| 492 | /** |
| 493 | * Filters the display output of custom columns in the Users list table. |
| 494 | * |
| 495 | * @since 2.8.0 |
| 496 | * |
| 497 | * @param string $output Custom column output. Default empty. |
| 498 | * @param string $column_name Column name. |
| 499 | * @param int $user_id ID of the currently-listed user. |
| 500 | */ |
| 501 | $r .= apply_filters( 'manage_users_custom_column', '', $column_name, $user_object->ID ); |
| 502 | } |
| 503 | |
| 504 | if ( $primary === $column_name ) { |
| 505 | $r .= $this->row_actions( $actions ); |
| 506 | } |
| 507 | $r .= "</td>"; |
| 508 | } |
| 509 | } |
| 510 | $r .= '</tr>'; |