Php 注意：未定义索引：（isset not work）

我试图注册一个创建自动密码并通过电子邮件发送，但每当执行代码时，我在所有字段中都会出现此错误（注意：未定义索引：）。请帮忙

isset

 //whether the name is blank
    if (isset($_POST['name']) and $_POST['name'] == '') 
 {
  $_SESSION['error']['name'] = "First Name is required.";
 }

配置

<?php



session_start();
include('/includes/db2.inc.php');
if(isset($_POST['submit']))
{

     //whether the name is blank
    if($_POST['name'] == '')
 {
  $_SESSION['error']['name'] = "First Name is required.";
 }
        //whether the last name is blank
    if($_POST['lastname'] == '')
 {
  $_SESSION['error']['lastname'] = "Last Name is required.";
 }


 //whether the email is blank
 if($_POST['email'] == '')
 {
  $_SESSION['error']['email'] = "E-mail is required.";
 }
 else
 {
  //whether the email format is correct
  if(preg_match("/^([a-zA-Z0-9])+([a-zA-Z0-9._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9._-]+)+$/", $_POST['email']))
  {
   //if it has the correct format whether the email has already exist
   $email= $_POST['email'];
   $sql1 = "SELECT * FROM users WHERE email = '$email'";
   $result1 = mysqli_query($mysqli,$sql1) or die(mysqli_error());
   if (mysqli_num_rows($result1) > 0)
            {
    $_SESSION['error']['email'] = "This Email is already used.";
   }
  }
  else
  {
   //this error will set if the email format is not correct
   $_SESSION['error']['email'] = "Your email is not valid.";
  }
 }
    //whether the username is blank
 if($_POST['username'] == '')
 {
  $_SESSION['error']['username'] = "User Name is required.";
 }
    //whether the pharmacy is blank
 if($_POST['pharmacy'] == '')
 {
  $_SESSION['error']['pharmacy'] = "Pharmacy Name is required.";
 }
    //whether the The RX30 Lincence is blank
 if($_POST['rx30lincence'] == '')
 {
  $_SESSION['error']['rx30lincence'] = "RX30 Lincence Name is required.";
 }


 function randomPassword() {
    $alphabet = "abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ0123456789";
    $pass = array(); //remember to declare $pass as an array
    $alphaLength = strlen($alphabet) - 1; //put the length -1 in cache
    for ($i = 0; $i < 8; $i++) {
        $n = rand(0, $alphaLength);
        $pass[] = $alphabet[$n];
    }
    return implode($pass); //turn the array into a string
}
. 
$rampass = randomPassword();

 //if the error exist, we will go to registration form
 if(isset($_SESSION['error']))
 {
  header("Location: regis.html.php");
  exit;
 }

 else

 {
$name = $_POST['name'];
     $lastname = $_POST['lastname'];
  $email = $_POST['email'];
   $username = $_POST['username'];

  $password = md5('$rampass');
  $licence = $_POST['rx30licence'];
  $city = $_POST['city'];
  $phone = $_POST['phone'];
  $fax = $_POST['fax'];
  $com_code = md5(uniqid(rand()));

  $sql2 = "INSERT INTO users (name, lastname, email, username, password, licence, city, phone, fax, com_code) VALUES ('name', '$lastname', '$email', '$username', '$password', '$licence', '$city', '$phone', '$fax', '$com_code')";
  $result2 = mysqli_query($mysqli,$sql2) or die(mysqli_error());

  if($result2)
  {
   $to = $email;
   $subject = "Confirmation from Ontime Soft inc to $username";
   $header = "Ontime Soft inc: Confirmation from Ontime Soft inc";
   $message = "your password is $rampass. rn";
   $message = "Please click the link below to verify and activate your account. rn";
   $message .= "http://www.rx30pr.com/confirm.php?passkey=$com_code";

   $sentmail = mail($to,$subject,$message,$header);

   if($sentmail)
            {
   echo "Your Confirmation link and password Has Been Sent To Your Email Address.";
   }
   else
         {

    echo "Cannot send Confirmation link to your e-mail address";
   }
  }
 }
}

?>

---

当未设置
$\u POST['name']
时，会出现通知，因此您可以使用：

if (isset($_POST['name']))
{
if ($_POST['name'] == '')
{
$_SESSION['error']['name'] = "First Name is required.";
}
}

您错过了输入的
名称
，使用了错误的
类型
使用
type=“text”

缺少
输入名称
将无法获取您的数据，并且没有
type=“pharmacy”
等等

 <div class="form-group">
              <input type="text" name="pharmacy" class="form-control" id="pharmacy" placeholder="Pharmacy Name">
          </div>
<div class="form-group">
              <input  type="text" name="rx30licence" class="form-control" id="rx30licence" placeholder="RX30 Licence">
          </div>
                <div class="form-group">
              <input  type="text" name="city" class="form-control" id="city" placeholder="City">
          </div>
<div class="form-group">
              <input  type="text" name="phone" class="form-control" id="phone" placeholder="Phone#">
          </div>
<div class="form-group">
              <input  type="text" name="fax" class="form-control" id="fax" placeholder="Fax#">
          </div>
   <span class="input-group-btn">
                    <input name="submit" type="submit" value="Submit"/>
                  </span>

    </div>



这些错误的第一个解决方法是使用@markm所说的
打印（$\u POST）
还可以在您的条件中使用
echo
，检查特定条件是否正在执行
print\r（$\u POST）是我要开始的地方。请确保在所有输入框中指定名称。例如，您在这里遗漏的姓名标签将是您在isset中使用的
和
是什么？只需使用
print\r（$\u POST）。
 <div class="form-group">
              <input type="text" name="pharmacy" class="form-control" id="pharmacy" placeholder="Pharmacy Name">
          </div>
<div class="form-group">
              <input  type="text" name="rx30licence" class="form-control" id="rx30licence" placeholder="RX30 Licence">
          </div>
                <div class="form-group">
              <input  type="text" name="city" class="form-control" id="city" placeholder="City">
          </div>
<div class="form-group">
              <input  type="text" name="phone" class="form-control" id="phone" placeholder="Phone#">
          </div>
<div class="form-group">
              <input  type="text" name="fax" class="form-control" id="fax" placeholder="Fax#">
          </div>
   <span class="input-group-btn">
                    <input name="submit" type="submit" value="Submit"/>
                  </span>

    </div>