需要php表单来命名哪些必填字段尚未填写

Question

我的php表单包含必填字段,但该消息不会让用户知道哪个字段尚未输入.我怎样才能做到这一点？

//if statement to check required fields
if ($name && $phone && $email && && $address && $city && $state && $zip && $month && $date && $year && $contact)...
    //if some required fields were not filled out
    echo "Please make sure you fill in all required fields<br>Click <a href=\"javascript:history.back(1)\">here</a> to return to our form.";
}

Answer 1

这是一个微不足道的例子......

// An array of required fields, these fields must not be empty
$requiredFields = array('name', 'email');  

// Iterate through required fields
foreach ($requiredFields as $fieldName)
{
    // Does this field have a value?
    if (empty($_REQUEST[$fieldName]))
    {
        echo 'rawr! go back and fill out ' . $fieldName . "<br>\n";
    }
}