Question

I currently have a problem with the code I have below..

It keeps saying

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[23000]: 
Integrity constraint violation: 1048 Column 'Firstname' cannot be null' 
in C:\xampp\htdocs\clubresults\checkregister.php:30 Stack trace: #0 
C:\xampp\htdocs\clubresults\checkregister.php(30): PDOStatement->execute() 
#1 {main} thrown in C:\xampp\htdocs\clubresults\checkregister.php on line 30

I’ve tried everything I know but I just cannot remove that error… any kind of help is really appreciated 😀
This php file is called checkregister.php

  $pdo = new PDO('mysql:host=localhost;dbname=clubresults', 'root', '12345678');
  #Set Error Mode to ERRMODE_EXCEPTION.
  $pdo->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);  

  $stmt = $pdo->prepare('INSERT INTO members 
           (firstname, surname, DD, MM, YYYY, 
           email, Player1, Player2, Player3, Player4, Player5)
          VALUES 
           (:firstname, :surname, :DD, :MM, :YYYY, 
           :email, :Player1, :Player2, :Player3, :Player4, :Player5)');

  $stmt->bindParam(':firstname', $_GET['firstname']);
  $stmt->bindParam(':surname', $_GET['surname']);
  $stmt->bindParam(':DD', $_GET['DD']);
  $stmt->bindParam(':MM', $_GET['MM']);
  $stmt->bindParam(':YYYY', $_GET['YYYY']);
  $stmt->bindParam(':email', $_GET['email']);
  $stmt->bindParam(':Player1', $_GET['Player1']);
  $stmt->bindParam(':Player2', $_GET['Player2']);
  $stmt->bindParam(':Player3', $_GET['Player3']);
  $stmt->bindParam(':Player4', $_GET['Player4']);
  $stmt->bindParam(':Player5', $_GET['Player5']);
  $stmt->execute();

This is my form in another php file:

<form name="register" method="post" action="checkregister.php">

<!--Text, using <p> tag for new line-->
Main Account Registration <p>
* All Fields Mandatory <P>


<div class="required_field">
<label for="leadername">Team Leader's First Name</label>
<input name="firstname" type="text" value="hihi"><p>
<span id="firstnameerror" class="error"></span>
</div>

the same code repeats for each of the other ones such as Surname, DD MM YY, etc

<input type="submit" name="submitbutton" id="submitbutton" value="Register">
<input type="reset" name="resetbutton" id="resetbutton" value="Clear all Fields">
</form>

Answer 1

Working backwards:

• MySQL complains about a null value; so why is null received?
• PDO passes null to MySQL if a null value is passed in bindParam(); why are we passing a null value?
• When a variable in PHP is not defined and you attempt to use it, it will a) issue a warning and b) implicitly set it to null; why are we using an undefined variable?
• The $_GET['firstname'] is not defined (amongst others); why is is not defined?
• You’re using method="post" in your form, so the form entries are passed via $_POST instead of $_GET.