我想插入如下类别：

A类

第1子类第2子类第3子类谢谢

这是我的密码

$term = wp_insert_term(
    $row[11], 
    \'product_cat\',
    [
        \'description\' => \'FooBar Category description\', 
        \'slug\' => $row[11]
    ]
);
if(is_wp_error($term)) {
    $term_id = $term->error_data[\'term_exists\'] ?? null;
} else {
    $term_id = $term[\'term_id\'];
}
$term1 = wp_insert_term(
    $row[12], 
    \'product_cat\', 
    array(
        // what to use in the url for term archive
        \'slug\' => $row[12], 
        // link with main category. In the case, become a child of the "Category A" parent  
        \'parent\' => term_exists($row[11], \'product_cat\')[\'term_id\']
    )
);
$term2 = wp_insert_term($row[13], \'product_cat\', 
    array(
        // what to use in the url for term archive
        \'slug\' => $row[13], 
        // link with main category. In the case, become a child of the "Category A" parent  
        \'parent\' => term_exists($row[12], \'product_cat\')[\'term_id\']
    )
);