正确登记联系表格中的错误

Question

所以我有一个用户在提交之前填写或不填写的联系表格。我有一个PHP脚本，它将执行输入内容而不是Javascript的验证，以提高安全性。我将PHP脚本编码为JSON格式，然后再将其传递给Javascript。我希望Javascript能够相应地显示错误消息，而PHP只是为了处理验证和发送电子邮件（成功时）。

我遇到的问题是在将错误传递给Javascript之前正确注册错误的好方法。这是我到目前为止的PHP表单（它已被编辑以删除错误消息的打印）：

<?php
ob_start();
/* Put Here email where you will receive Contact message*/
$yourEmail = "email@email.com"; // <== Your Email
$secret = 'LALALALAALALALALALALA'; // <==Your recaptcha Privte Key
/*---------------------------------------*/

// ---------------------Start the recaptcha ------------------------------------//
if(isset($_POST['g-recaptcha-response']) && ($_POST['g-recaptcha-response'])){
        session_start();
    $ip = $_SERVER['REMOTE_ADDR'];
    $captcha = $_POST['g-recaptcha-response'];
    $response = file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=$secret&response=$captcha&remoteip=$ip");
    $result = json_decode($response,TRUE);
        if($result['success'] == 1){
            $_SESSION['result'] = $result['success'];
            }

// --------------------End Of the Captcha Check------------------------- //

/////////////Showing all errors in array : DO NOT DELETE THIS
$formerrors = array();
///////////////////This Array will Hold all errors

// Start Captcha
if(!isset($_SESSION['result']) || $_SESSION['result'] == 0){
    $formerrors[] =  'Captcha Error';
}
//end Captcha


// remove this to make name not required
if(empty($_POST['name'])){
$formerrors[] = "Name Cannot be empty";
}
// End name


// Remove this to make email not required
if(empty($_POST['email'])){
  $formerrors[] = "Email Cannot be empty";
}
// End of email

// Remove this to make email not required
if(filter_var($_POST['email'],FILTER_VALIDATE_EMAIL) == FALSE){
  $formerrors[] = "Make Sure Email is valid";
}
// End of email

// Remove this to make Phone not required
if(empty($_POST['phone'])){
  $formerrors[] = "Phone Number Cannot be empty";
}
// End of Phone



// Remove this to make Phone not required
if(!is_numeric($_POST['phone'])){
  $formerrors[] = "Phone Is not valid";
}
// End of Phone



// Remove this to make Message not required
if(empty($_POST['message'])){
   $formerrors[] = "Message Cannot be empty";
}
// End Of Message


// Remove this to make Subject not required
if(empty($_POST['subject'])){
   $formerrors[] = "Select a subject First";
}
// End Of Subject



/* Your New inputs */

    // CODE HERE

/* end of new Inputs*/




// End Showing Errors In Array

//JSON Encode
echo json_encode($formerrors);


if(count($formerrors) == 0){
 // Saving data in variable :
    $name = $_POST['name'];
    $email = $_POST['email'];
    $phone = $_POST['phone'];
    $title = $_POST['subject'];
    $message = $_POST['message'];
    /* Your New inputs */

        // $newinput = $_POST['new-input'] // new-input same as ID and ajax

    /* end of new Inputs*/

    //If No Error in the Array Start Sending the email
    $to = $yourEmail;   // Email to receive contacts
    $from = $email;
    $subject = 'Contact Form Email : ' . $title;
    $message = '<style>
                body{background-color:#fefefe}
                .email-style {padding: 30px;background: #fafafa;font-size: 18px;border: 1px solid #ddd;width: 60%;margin: auto;}
                p {padding: 15px 0px;}
                </style>

                <div class="email-style"><p> '.$title . '</p>

                <p>Contact Full Name : '.$name . ' </p>

                <p>Contact Email : '.$email . ' </p>

                <p>Contact Phone Number : '.$phone . '</p>

                <p>Message : '.$message . ' </p>

                <p>Cheers,</p>
                <p>'.$name.' Via Contact Form</p></div>';

    $headers = "From: $from\n";
    $headers .= "MIME-Version: 1.0\n";
    $headers .= "Content-type: text/html; charset=iso-8859-1\n";
       if( mail($to, $subject, $message, $headers) ){
            echo "sent";
            session_unset();
            session_destroy();
          } else {
                   echo "The server failed to send the message. Please try again later.";
                }
              }
            }
ob_flush();
?>

任何人都可以建议一种正确而干净地注册错误消息的方法吗？