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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 |
---|---|
490 | /** |
491 | * Filter the display output of custom columns in the Users list table. |
492 | * |
493 | * @since 2.8.0 |
494 | * |
495 | * @param string $output Custom column output. Default empty. |
496 | * @param string $column_name Column name. |
497 | * @param int $user_id ID of the currently-listed user. |
498 | */ |
499 | $r .= apply_filters( 'manage_users_custom_column', '', $column_name, $user_object->ID ); |
500 | } |
501 |
|
502 | if ( $primary === $column_name ) { |
503 | $r .= $this->row_actions( $actions ); |
504 | } |
505 | $r .= "</td>"; |
506 | } |
507 | } |
508 | $r .= '</tr>'; |