This script will get seat price data from SJ (Swedish train operator), not to search in timetable. 
For timetable search use for example: http://transport.opendata.ch/
Acces to german prices for domestic german routes can be found in: http://code.google.com/p/openbahn-api/wiki/APIDocumentation
To convert prices to EURO http://www.ecb.int/stats/eurofxref/eurofxref-daily.xml is a good place to start.

You may try to use http://www.thure.org/price/sj-price-api.php to test the script.

The request is very slow. This is the delay from SJ when responding to a price request.

Example request: 
sj-price-api.php?from=Lund+C&to=Stockholm+C&deparatureTime=06:25&date=2012-11-12

Example response:
{
	"deparatureTime"	:	"06:25",
	"arrivalTime"		:	"10:50",
	"date"				:	"2012-11-12",
	"from"				:	"Lund C",
	"to"				:	"Stockholm C",
	"travelerAge"		:	null,
	"promotionCode"		:	null,
	"travelerIsStudent"	:	null,
	"price"				:	"419 SEK",
	"validPrice"		:	true,
	"soldOut"			:	false,
	"bookable"			:	true,
	"departed"			:	false
}

Example request (XML):
sj-price-api.php?from=Lund+C&to=Stockholm+C&deparatureTime=06:25&date=2012-11-12&xml=1

Example responce (XML):
<?xml version="1.0"?>
<trip>
	<deparatureTime>06:25</deparatureTime>
	<arrivalTime>10:50</arrivalTime>
	<date>2012-11-12</date>
	<from>Lund C</from>
	<to>Stockholm C</to>
	<travelerAge></travelerAge>
	<promotionCode></promotionCode>
	<travelerIsStudent></travelerIsStudent>
	<price>419 SEK</price>
	<validPrice>1</validPrice>
	<soldOut></soldOut>
	<bookable>1</bookable>
	<departed></departed>
</trip>

#################### Request data ###################
Key:							Data:		Example:		Comment:			
deparatureTime 		[Required]	[HH:MM]		[06:30]
arrivalTime			[Optional]	[HH:MM]		[10:00]			Use if two trains have the same deparature time.
date				[Required]	[YYY-MM-DD]	[2013-01-15]
from				[Required]	[Name]		[Lund C]
to					[Required]	[Name]		[Stockholm C]
travelerAge			[Optional]	[NN]		[23]
promotionCode		[Optional]	[String]	[MAX295]
travelerIsStudent	[Optional]	[Any]		[1]				(Any data is counted as true including 0 and false)
xml				  	[Optional]	[Any]		[1]				(Any data is counted as true including 0 and false)

#################### Respone data ###################
Key:				Data:		Example:
deparatureTime 		[HH:MM]		[06:30]
arrivalTime			[HH:MM]		[10:00]
date				[YYY-MM-DD]	[2013-01-15]
from				[Name]		[Lund C]
to					[Name]		[Stockholm C]
travelerAge			[NN]		[23]
promotionCode		[String]	[MAX295]
travelerIsStudent	[Any]		[1]
price				[N SEK]		[345 SEK]
validPrice			[T/F]		[True]
soldOut				[T/F]		[False]
bookable			[T/F]		[True]
departed			[T/F]		[False]