Catchable fatal error

[dean7]

Hi all, sorry about the subject as I wernt sure what to call it but anyway, Ive re coded a feature on my website which gives the user a chance to race agienst the computer but ive got an error saying:

 

Catchable fatal error: Object of class stdClass could not be converted to string in /home/www/*****/test/test.php on line 52

 

<?php
session_start();
include ("../includes/config.php");
include ("../includes/functions.php");
logincheck();

ini_set ('display_errors', 1);
error_reporting (E_ALL);

$username = $_SESSION['username'];

$userstuff = mysql_query ("SELECT * FROM users WHERE username = '$username'") or die (mysql_error());
	$user = mysql_fetch_object($userstuff);

$garstu = mysql_query ("SELECT * FROM garage WHERE owner='$username'") or die (mysql_error());
		$garage = mysql_fetch_object($garstu);

$usercar = mysql_query ("SELECT carid FROM users WHERE username='$username'") or die (mysql_error());
			$carin = mysql_fetch_object($usercar);

$time= time() + 120; // Waiting time.

if ($user->lastraceone > time()){
$left = $user->lastraceone - time();
echo "<center><b><font color=white>You Must Wait $left seconds before you race agian!</font></b></center>";
exit();
}

// Use function to make sure there in a car..
function carcheck(){
if (empty($carin)){
echo ("You must be in a car before doing any races.");
}
else{
echo ("You are currently in: $carin.");
}
}	
// End function	

if (isset($_POST['race'])){
$race = $_POST['radiobutton'];
carcheck();
//////////////////////////////////////// RACE 1 /////////////////////////////////////////////
if ($race == "1"){
// Rep gained
$rand = rand(1000,10000);
// Money gained
$randmoney = rand(1000,15000);
// Fuel used
$randfuel = rand(3,10);
mysql_query ("UPDATE users SET lastraceone = '$time' AND rep = 'rep+$rand' AND money = 'money+$randmoney' WHERE username='$username'") or die (mysql_error());
mysql_query ("UPDATE garage SET fuel = 'fuel-$randfuel' WHERE id = '$carin'") or die (mysql_error()); // Line 52
echo ("Well Done! You won: £$randmoney and $rand Rep. You also used $randfuel liters of fuel.");
}
/////////////////////////////////////// RACE 2 ////////////////////////////////////////////
if ($race == "2"){
// Rep gained
$random = rand(1000,10000);
// Money gained
$ranmoney = rand(1000,15000);
// Fuel used
$randomfuel = rand(3,10);
mysql_query ("UPDATE users SET lastraceone = '$time' AND rep = 'rep+$random' AND money = 'money+$ranmoney' WHERE username='$username'") or die (mysql_error());
mysql_query ("UPDATE garage SET fuel = 'fuel-$randomfuel' WHERE id = '$carin'") or die (mysql_error());
echo ("Well Done! You won: £$ranmoney and $random Rep. You also used $randomfuel liters of fuel.");
}	
}			
?>
<form action='' method='post' name='thisform'>
Race along the Streets: <input name='radiobutton' type='radio' value='1'><br />
Race along A Drag Strip: <input name='radiobutton' type='radio' value='2'><br />
<input type='submit' name='race' Value='Race!'>

 

mysql_query ("UPDATE garage SET fuel = 'fuel-$randfuel' WHERE id = '$carin'") or die (mysql_error()); // Line 52

 

Also line 52 is stated in the script

 

I havent fully tested my script yet, while it not completly finished. But can anyone see why its giving me that error and how / or I can sort it please?

 

Thanks for your help.

[taquitosensei]

you are setting $carin to an object here

$carin = mysql_fetch_object($usercar);

 

you'll need to get the information you want out of that object.