错误：SQLSTATE[HY093]：无效的参数号：未定义参数

Question

I need to send the name , lastname , number and email to a database. I created this code:

<?php
  echo $name;echo "<br>";
  echo $lastname;echo "<br>";
  echo $email;echo "<br>";
  echo $celnumber;echo "<br>";
  $servername = "localhost";
  $username = "usertest1";
  $password = "1234";
  $dbname="usertest1";
  try {
      $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
      // set the PDO error mode to exception
      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

      // prepare sql and bind parameters
      $stmt = $conn->prepare("INSERT INTO tabela_script (name, lastname, email, celnumber)
      VALUES (:name, :lastname, :email, :celnumber)");
      $stmt->bindParam(':firstname', $name);
      $stmt->bindParam(':lastname', $lastname);
      $stmt->bindParam(':email', $email);
      $stmt->bindParam(':celnumber', $celnumber);
      $stmt->execute();

      echo "New record created successfully";
      }
  catch(PDOException $e)
      {
      echo "Error: " . $e->getMessage();
      echo "<br>";
      echo "<a href=\"main_html.html\"><h1>TRY AGAIN</h1></a>";
      }
  $conn = null;?>

And getting the error below:

Error: SQLSTATE[HY093]: Invalid parameter number: parameter was not defined

Answer 1

I have to try below code on my local server.

Change

$stmt->bindParam(':firstname', $name);

To

$stmt->bindParam(':name', $name);

The issue was exact name was not matched that's why to return the error like this Error: SQLSTATE[HY093]: Invalid parameter number: parameter was not defined

Answer 2

This error can happen when you have the wrong column name from your database in your PDO statement. Finally found that solution after trying many varieties of answers for this error.