PHP fel.. Webhotellet har bytt php 5.x till 7.x

function validate_race($wID)
{global $con;
	$strsql = "SELECT $db2.races.last_signup FROM $db2.races WHERE races.last_signup >= ".date("Ymd")." AND races.id='".$wID."'";
	$answer = mysqli_query($con,$strsql) or die (mysqli_error($answer));	
	if (mysqli_fetch_array($answer)) {
		return 1;
	}
	else {
		return 0;
	}
}

else if (validate_race($_GET['race']) == 1) {
	if (isset($_SESSION['wID'])) {
		$strsql = "SELECT $db2.user_data.* FROM $db2.user_data,$db2.users WHERE user_id='". $_SESSION['wID'] ."'";
		$result = mysqli_query($con,$strsql) or die (mysqli_error($con));
		$user = mysqli_fetch_array($result);
		$strsql = "SELECT $db2.users.email,$db2.users.id FROM $db2.users WHERE id='". $_SESSION['wID'] ."'";
		$result = mysqli_query($con,$strsql) or die (mysqli_error($con));
		$foo = mysqli_fetch_array($result);
		$email = $foo['email'];
	}

<?
// Databas inställningar
$host = "xxx";
$username = "yyy";
$password = "zzz";
$db2 = "aaa"; // Databasnamn

//Anslut till databasservern
// @mysql_connect($host, $username, $password) or print("Kunde ej koppla upp!"); // För PHP 5.x
$con = @mysqli_connect($host, $username, $password) or print("Kunde ej koppla upp!"); // För PHP 7.x
?>

<?php
	include ("dblib.php");
	$strsql = "SELECT $db2.users.id,$db2.users.username,$db2.users.fullname,$db2.users.email FROM users WHERE disabled=0 ORDER BY users.fullname ASC";
	$result = mysqli_query($con,$strsql);
	while ($user = mysqli_fetch_array($result)) {
	$res = mysqli_query($con,$db2,"SELECT COUNT(id) AS login_times FROM login_log WHERE $db2.user='". $user['id'] ."'");
	$foo = mysqli_fetch_array($res);
		?>
		<tr>
			<td>
				<?php echo $user['username']; ?>
			</td>
	        	<td>
				<?php echo $user['fullname']; ?>
			</td>
			<td>
				<?php echo $user['email']; ?>
			</td>
			<td>
				<?php echo $foo['login_times']; ?>
			</td>
			<td>
			<td>
				<a href="admin_users.php?action=remove&id=<?php echo $user['id']; ?>">Ta bort</a>
			</td>
			<td>
				<a href="admin_user_history.php?user=<?php echo $user['id']; ?>">Log</a>
			</td>
		</tr>
		<?php
	}
?>