验证消息未显示php

Question

我是php的初学者。我设计了下面的代码来运行php表单。

如果我点击提交按钮。它没有显示必填字段的信息。 请告诉我代码编写的错误在哪里。

由于

<?php include('header.php'); ?>
<?php
if (isset($_POST['submit'])) {  
if (empty($_POST['co_name']) || isset($_POST['co_name'])){
echo 'Field is empty';
exit();
}
}
?>
<h1>Inquery </h1>
<!--<div class="box effect3">-->
<div id="frmsubmit">
<form class="email" name="form1" action="inquery.php" method="post">
<p>Contact Person <span>*</span></p>
<input type="text" name="co_name" />
<p>Company Name <span>*</span></p>
<input type="text" name="cname" />
<p>Address <span>*</span></p>
<textarea name="address"></textarea></p>

<p>Mobile Number <span>*</span></p>
<input type="text" name="mobile" />

<p>E-mail <span>*</span></p>
<input type="text" name="email" />
<p>Phone Number</p>
<input type="text" name="ph" />
<p>Subject <span>*</span></p>
<input type="text" name="subject" />
<p>Message <span>*</span></p>
<textarea name="message"></textarea></p>
<br />
<input class="send" type="submit" value="submit">
</form>
<br /><br /><br /><br /><br />
</div><!--frmsubmit codes-->
<!--</div>--><!--effect2 div-->



<?php include('footer.php'); ?>

inq_mail.php

的代码

<?php
if(isset($_POST['email'])) {

// EDIT THE 2 LINES BELOW AS REQUIRED
$email_to = "myemail@domain.com";
$email_subject = $_POST['subject'];


function died($error) {
    // your error code can go here
    echo "We are very sorry, but there were error(s) found with the form you    
submitted. ";
    echo "These errors appear below.<br /><br />";
    echo $error."<br /><br />";
    echo "Please go back and fix these errors.<br /><br />";
    die();
}

// validation expected data exists
if(!isset($_POST['name']) ||
    !isset($_POST['cname']) ||  
    !isset($_POST['address']) ||    
    !isset($_POST['subject']) ||
    !isset($_POST['email']) ||
    !isset($_POST['mobile']) ||
    !isset($_POST['ph']) ||
    !isset($_POST['message'])) {
    died('We are sorry, but there appears to be a problem with the form you  
submitted.');      
}

$name = $_POST['name']; // required
$cname = $_POST['cname']; // required
$address = $_POST['address']; // required
$subject = $_POST['subject']; // required
$email_from = $_POST['email']; // required
$mobile = $_POST['mobile']; // required
$ph = $_POST['ph']; // required
$message = $_POST['message']; // not required

$error_message = "";




   $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
  if(!preg_match($email_exp,$email_from)) {
 $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
 }


//  $string_exp = "/^[A-Za-z .'-]+$/";
//  if(!preg_match($string_exp,$name)) {
//    $error_message .= 'The Name you entered does not appear to be valid.<br />';
//  }
//   if(!preg_match($string_exp,$cname)) {
//    $error_message .= 'The Name you entered does not appear to be valid.<br />';
//  }
//   if(!preg_match($string_exp,$address)) {
//    $error_message .= 'The Name you entered does not appear to be valid.<br />';
//  }
//   if(!preg_match($string_exp,$mobile)) {
//    $error_message .= 'The Name you entered does not appear to be valid.<br />';
//  }
//   if(!preg_match ('/[^0-9]/', $element) || $mobile=="") {
//    $error_message .= 'Please enter Numeric Value Or Field required.<br />';
//  }
//  if(!preg_match($string_exp,$subject)) {
//    $error_message .= 'Please fill the subject field.<br />';
//  }
 //  if(strlen($message) < 2) {
//    $error_message .= 'The Comments you entered do not appear to be valid.<br />';
//  }
 //  if(strlen($error_message) > 0) {
//    died($error_message);
//  }

if ($name == "")
{
echo "Field is empty";
}
   $email_message = "Form details below.\n\n";

  function clean_string($string) {
  $bad = array("content-type","bcc:","to:","cc:","href");
  return str_replace($bad,"",$string);
}

$email_message .= "<b>Name    :</b> ".clean_string($name)."\n";
$email_message .= "<b>Subject :</b> ".clean_string($subject)."\n";
$email_message .= "<b>Email   :</b> ".clean_string($email_from)."\n";
$email_message .= "<b>Email   :</b> ".clean_string($email_from)."\n";
$email_message .= "<b>Message :</b> ".clean_string($message)."\n";



// create email headers
$headers = 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
 @mail($email_to, $email_subject, $email_message, $headers); 
?>

<!-- include your own success html here -->

Thank you for contacting us. We will be in touch with you very soon.

<?php
}
?>

Answer 1

更改

<form class="email" name="form1" action="inquery.php" method="post">

到

<form class="email" name="form1" action="" method="post">

和

<input class="send" type="submit" name="submit" value="submit">

Answer 2

您可以使用HTML5，将必需属性添加到您的字段中：

<!DOCTYPE html>
<html>
<body>
<form action="http://google.com">
 <input type="text" name="q" required/>
 <input type="submit" />
</form>
</body>
</html>

请记住，服务器端的PHP流程数据，如果您需要在客户端进行更复杂的验证，则应使用JavaScript（JQuery）。

Answer 3

@ user3060235 - 几个扩展点......

1. 扩展alok的答案 - 您的提交按钮上没有名称属性。这对于确保表单字段绑定到PHP $ _POST变量至关重要。
2. 扩展Ignacio的答案 - HTML5属性非常有用，但这只在客户端完成。虽然从用户体验的角度来看这很好，但您仍需要在服务器端验证表单参数。 JavaScript: client-side vs. server-side validation
3. 在表单提交和先前建议完成时，exit（）语句将阻止用户再次看到该表单以重新提交其输入。您可能实际上想要这取决于客户端要求，但如果您不想要，则需要删除退出语句。