headers not working PHP - php

Question

Page 1 abc.html.. on submit it will jump to this PHP page .
This is page PHP1.php here i am trying to validate user input if name and id in in data he will be forwarded to fill out second part of registration if not it will just give error.
<?php
session_start();
$_SESSION["acb"] = "good";
$_SESSION['team'] = $_POST['team_name'];
$con = mysql_connect("localhost", "user", "password");
if (!$con)
{die('Could not connect: ' . mysql_error());}
mysql_select_db("mydbName");
if(isset($_POST['team_name'],$_POST['id'])){
$team_name = mysql_real_escape_string($_POST['team_name']);
$id = mysql_real_escape_string($_POST['id']);
if (!empty($team_name)) {
$result= mysql_query("SELECT COUNT(`teamname`) FROM `table` WHERE `teamname`='$team_name' AND `id`='$id'");
$team_result = mysql_fetch_row($result);
if ($team_result[0] == '0') { //if does not exist print failed.
echo 'Varification failed';
} else {
header('Location: http://www.abc.com/REGISTERpart2.php');
}} } ?>
RegisterPART2.php is where i am checking my session exist or not (the one i started in last file). if not i want to redirect back to form one and fill that first then come to registration part 2
`<?php
session_start();
$name = $_SESSION['team']; //a value stored in session which i used on this page
if (($_SESSION["abc"] !== 'good')) {
header('Location: http://www.abc.com/page1.html'); //take back to stage 1 coz user did not fill first part.
}
else{
echo $name. 'you have completed register process part one you may continue!';
}
?>

Answer 1

If you're using the new MySQL version (MySQLi), so the first page will become:
<?php
session_start();
$_SESSION["acb"] = "good";
$_SESSION['team'] = $_POST['team_name'];
$con = new mysqli("localhost", "user", "password", "mydbName");
if (!$con) {
die('Could not connect: ' . $con->error());
};
if (isset($_POST['team_name'],$_POST['id'])) {
$team_name = $con->real_escape_string($_POST['team_name']);
$id = $con->real_escape_string($_POST['id']);
if (!empty($team_name)) {
$result = $con->prepare("SELECT COUNT(`teamname`) FROM `table` WHERE `teamname`='$team_name' AND `id`='$id'");
$result->execute();
$result->bind_result($one,$two,$three,$etc);
$result->fetch();
if (empty($one) and empty($two) and empty($three) and empty(etc)) { // may be and/or (pick one)
echo 'Varification failed';
} else {
header('Location: http://www.abc.com/REGISTERpart2.php');
}
}
}
?>

Answer 2

You may use the following alternative to header.
prinf('<script>window.location = "URL HERE"</script>');
It should do the same thing as header does.