Hi everyone, I'm new to programming and I'm doing an online registration form for my project. I have a problem with my form. After submitting my form, a confirmation page will show up with the information displayed on the page. When I click submit on the confirmation page, It is suppose to submit the data into the database. However I get HTTP 500 internal error The page cannot be displayed. I'm using ODBC for my connection and the connection is working as I can submit and retrieve information from the database using codes for other projects.
This is the code for the form and confirmation page

<?php
error_reporting(E_ALL ^ E_NOTICE);
?>
<?php

function checkphone()    {
global $tel;
$phone = $_POST['hometel'];
  if (!preg_match('/^[0-9]{8}$/', $phone)) {
$tel = '<font color="red"><b>Your telephone number is invalad</b></font>';
  $GLOBALS['tel'] = $tel;       }
 else{
     $GLOBALS['showtel'] = "true";
  }
}


 function checkemail()	{
global $mail;
$email = $_POST['email'];
	if (!preg_match('/^([a-zA-Z0-9])+([a-zA-Z0-9\.\\+=_-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/', $email)) {
	$mail = '<font color="red"><b>Your Email is invalid</b></font>';

	$GLOBALS['mail'] = $mail; }
  else
  {
    $GLOBALS['showmail'] = "true";
  }
	}

 if($_POST['submit'])
{
checkphone();
checkemail();
 }
 	if(!$showtel||!$showmail){
	?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>FYP</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>

<body>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
    <p align="center">Name:
      <input type="text" name="username" />
</p>
<p align="center">Admin No.:

  <input type="text" name="admin" />
</p>
<p align="center">Gender:
  <select name="gender">
    <option value="male" selected>Male</option>
    <option value="female">Female</option>
      </select>
</p>
<p align="center">Address:
  <textarea name="address" cols="40"></textarea />
</p>
<p align="center">Home Phone:
<input type="text" name="hometel" />  <br>
<?php echo $tel; ?>
</p>
<p align="center">Mobile Phone:
<input type="text" name="hp" />
</p>
<p align="center">Contact Email:
<input type="text" name="email" /> <br>
<?php echo $mail; ?>
</p>
<p align="center">Course:
<select name="course">
  <option value="ECC">ECC</option>
</select>
</p>
<p align="center">Acad Year:
<input type="text" name="year" />
</p>
<p align="center">Path:
<select name="path">
  <option value="1">B1</option>
  <option value="2">B2</option>
  <option value="3">B3</option>
</select>
</p>
<p align="center">Project Title:
  <textarea name="title" cols="40"></textarea>
</p>
<p align="center">Project Supervisor:
<select name="supervisor">
  <option value="Mr. Stephen Liew K C" selected>Mr. Stephen Liew K C</option>
  <option value="Mr. Steven Ng">Mr. Steven Ng</option>
</select>
</p>
<p align="center">
<input name="submit" type="submit" />
</p>

</form>

<?php
} else {
?>
<form action="datasubmit.php"  method="post">
<?php

echo'<div align="center">';
echo '<p>Name:  '.$_POST["username"].' <br />';
echo 'Admin No.:  '.$_POST["admin"].' <br />';
echo 'Gender:  '.$_POST["gender"].' <br />';
echo 'Address: '.$_POST["address"].' <br />';
echo 'Home Phone:  '.$_POST["hometel"].' <br />';
echo 'Handphone: '.$_POST["hp"].' <br />';
echo 'Contact Email:  '.$_POST["email"].' <br />';
echo 'Course: '.$_POST["course"].' <br />';
echo 'Acad Year: '.$_POST["year"].' <br />';
echo 'Path: '.$_POST["path"].' <br />';
echo 'Project title:'.$_POST["title"].' <br />';
echo 'Project Supervisor: '.$_POST["supervisor"].' <br />';

?>
<p>
    <input type="submit" name="Submit" value="Submit">
	</form>
</p>
  <p>
    <input name="button" type=button onClick=window.history.back() value=Back back>
  </p>
  </div>
  
  <?php }?>
  
</body>
</html>

And this is the code that I'm trying to use to submit into the database.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<?php
$username = $_POST['username'];
$admin = $_POST['admin'];
$gender = $_POST['gender'];
$address = $_POST['address'];
$phone = $_POST['hometel'];
$hp = $_POST['hp'];
$email = $_POST['email'];
$course = $_POST['course'];
$year = $_POST['year'];
$path = $_POST['path'];
$title = $_POST['title'];
$supervisor = $_POST['supervisor'];
echo "Data has been submitted";

function Enter_New_Entry($username,$admin) {

  
   if(!$cnx = odbc_connect( 'FYP' , 'root', '' ))die("error with connection");
    $SQL_Exec_String = "Insert Into rank (name, admin, gender, address, hometel, hp, email, course, year, path, title, supervisor )
            Values ('$username', '$admin', '$gender', '$address', '$phone', '$hp', '$email', '$course', '$year', '$path', '$title', '$supervisor')";

    $cur= odbc_exec( $cnx, $SQL_Exec_String );
    if (!$cur) {
        Error_handler( "Error in odbc_exec( no cursor returned ) " , $cnx );
    }

    odbc_close( $cnx);
}
Enter_New_Entry($username,$admin);
?>

</body>
</html>

I found out that the http 500 error was due to Data type mismatch critearia expression. After changing, the data type from number to text, I get a new error. It stats that every value is undefined and there are missing argument for Enter_New_Entry. Does anyone know how to solve this problem ?

It seems that the register_global being off could be the problem for my code. I've tried turning register_global on and using session, it manage to insert the username and admin into the database. However everything starting with gender is being submitted as blank. I've read online that turning register_global is quite dangerous. Is there any way to get around this problem ?

Hi,

Try to print the $SQL_Exec_String and check what query its creating.
If you can post the query then it will also help.

Thanks for the advice vick_rawat but it seems to be working now. I'm using $_SESSION = $username to get it working. Also is there any tutorial you can reccomand on updating the database?

Thank you for the link but I'm using MS Access as my database. Is there any other websites you can reccomand? I've tried googling but most of them are for insert and making the connection. I need to learn how to update the database via a form rather than using codes.

Sorry for causing a misunderstanding, I think the right word I should use is modify. I would like to modify my contents in the database via a website instead of typing the values into the codes. For example if I made a mistake and typed 110 for my age, I would like to have a function where I can show the entry with the mistake and correct it in a webpage.

This article has been dead for over six months. Start a new discussion instead.