PHP 什么面向对象的函数可以代替 mysql_insert_id()?

PHP What object oriented function can replace mysql_insert_id()?

$run = $con->query ( $query );
$id = mysql_insert_id ();


//find category Name
    $category = $_REQUEST ['category'];
    $run1 = $con->query ("select * from category where id='$category'");
    $run2=$run1->fetch_array();
    $category=$run2['category'];
    
//find  subcategory Name
$run11 = $con->query ("select * from subcategory where id='$subcategory'");
$run21=$run11->fetch_array();
$subcategory=$run21['subcategory'];

参见 mysqli::$insert_id。 mysql_insert_id() 是现已弃用的 mysql-extension.

的一部分