determine date range

[slith <slithone@xxxxxxxxx>]

I'm working on hotel type booking script where prices will vary 
depending on the season. prices are updated every year so i need to take 
a user inputed date and determine which season the date falls under.

i figured i can convert all dates into a timestamp and then run a series 
conditional statements to see which returns true.

something like this:

// date ranges
$dates[1]['start'] = mktime(0, 0, 0, '01', '04', date('Y')); 	
$dates[1]['end'] = mktime(0, 0, 0, '04', '14', date('Y')); 	

$dates[2]['start'] = mktime(0, 0, 0, '04', '15', date('Y')); 	
$dates[2]['end'] = mktime(0, 0, 0, '08', '18', date('Y')); 	

$dates[3]['start'] = mktime(0, 0, 0, '08', '19', date('Y')); 	
$dates[3]['end'] = mktime(0, 0, 0, '12', '23', date('Y')); 	

$dates[4]['start'] = mktime(0, 0, 0, '12', '14', date('Y')); 	
$dates[4]['end'] = mktime(0, 0, 0, '01', '03', date('Y') + 1); 	

// tstamp is user inputed date
if($tstamp >= $dates[1]['start'] && $tstamp <= $dates[1]['end']){
	return 1;
}
	
if($tstamp >= $dates[2]['start'] && $tstamp <= $dates[2]['end']){
	return 2;			
}
		
if($tstamp >= $dates[3]['start'] && $tstamp <= $dates[3]['end']){
	return 3;
}

if($tstamp >= $dates[4]['start'] && $tstamp <= $dates[4]['end']){
	return 4;			
}


now, not sure why this isn't working...but it's not returning true for 
any of these.

also i'm realizing i need to account for people who decide to book a 
date a year ahead, in which case this approach will break since all 
timestamp date ranges (except for $date[4]['end']) are set to the 
current year.

any suggestions on how i should approach this problem?


		

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