Problem whith the length of the variable in the table.

I have table for increment variables min et max to search in data database the number between min to max. 

//tableaux des 11 ?l?ments des fourchettes de PRIX 
$PrixMin=Array(1=>"0","300000","500000","750000","1000000","1250000","1500000","1750000","2000000","2250000","2500000","3000000");	
$PrixMax=Array(1=>"300000","500000","750000","1000000","1250000","1500000","1750000","2000000","2250000","2500000","3000000","10000000");

If($Prix=12) // if price = 12?me element try to find le price between 3000000 and 10000000  
	
{$query = "SELECT *  FROM Biens AS t1,Client AS t2  WHERE t1.Ref=t2.Ref AND t1.Dep='$Dep' AND t1.Type1='$TPE' AND t1.PrixVente BETWEEN '$PrixMin[$Prix]' AND '$PrixMax[$Prix]'";}
 
			
// Fin de  PRIX =12

If I change the variable 10000000 to 9000000 that work else you have nothing in the database. Of course I try to find some price to put before in my database.

Ok I sorry for my bad english, but I hope you understand me  else you have the code to explain the problem.