验证联系表格7中的复选框

Question

如何验证复选框以仅在wordpress联系表单7中选择一个？我在functions.php

中编写了以下代码

function custom_cf7_required_check_filter($result, $tag) {    
    $val = $_POST['Yes']; 
    $opts = strpos($val, ",");

    if($opts != false){
        $result['reason']['Yes'] = "True";
    }else{
        $result['reason']['Yes'] = "False";
    }
    return $result;
}
add_filter('wpcf7_validate_checkbox', 'custom_cf7_required_check_filter', 10, 2);

Answer 1

为什么不使用联系表单7内置验证？根据需要设置......

[checkbox* checkbox-71 "YES"]