<?php
/* date.inc.php
 * Martin Lenzelbauer, 2006
 */
 
 
# Y-m-d H:i:s => d.m.Y
//------------------------------
function datetime2dmy($date){
//------------------------------
	$d = substr($date,8,2);
	$m = substr($date,5,2);
	$y = substr($date,0,4);
	return "$d.$m.$y";
}

# Y-m-d H:i:s => d.m.Y H:i
//------------------------------
function datetime2dmyhi($date){
//------------------------------
	$d = substr($date,8,2);
	$m = substr($date,5,2);
	$y = substr($date,0,4);
	$h = substr($date, 11,2);
	$i = substr($date,14,2);
	return "$d.$m.$y $h:$i";
}

# creates date from d, m, y
//------------------------------
function createDate($d, $m, $y){
//------------------------------
	$date = "";
	//year
	if(ereg("^[0-9]{4}$", $y)){
		$date .= $y;
	}
	else if(ereg("^[0-9]{2}$", $y)){
		$date .= "20$y";
	}
	else{
		$date .= date("Y");
	}
	$date .= "-";
	//month
	if(!empty($m)){
		if(ereg("^[0-9]{2}$", $m)){
			$date .= $m;
		}
		else{
			$date .= "0$m";
		}
	}
	else{
		$date .= date("m");
	}
	$date .= "-";
	//day
	if(!empty($d)){
		if(ereg("^[0-9]{2}$", $d)){
			$date .= $d;
		}
		else{
			$date .= "0$d";
		}
	}	
	else{
		$date .= date("d");
	}
	return $date;
}

# creates date from d, m, y, h, i
//------------------------------
function createDatetime($d, $m, $y, $h, $i){
//------------------------------
	$date = createDate($d, $m, $y);
	$date .= " ";
	//hour
	if(!empty($h)){
		if(ereg("^[0-9]{2}$", $h)){
			$date .= $h;
		}
		else{
			$date .= "0$h";
		}
	}
	else{
		$date .= date("H");
	}
	$date .= ":";
	//minutes
	if(!empty($i)){
		if(ereg("^[0-9]{2}$", $i)){
			$date .= $i;
		}
		else{
			$date .= "0$i";
		}
	}
	else{
		$date .= date("i");
	}
	$date .= ":00";
	return $date;
}

# returns only the given part of the date
//----------------------------
function dateGet($date, $format){
//----------------------------
	switch($format){
		case "Y": return substr($date, 0, 4);
		case "m": return substr($date, 5, 2);
		case "d": return substr($date, 8, 2);
		case "F": return monthname(substr($date, 5, 2));
	}
}

# returns only the given part of the dateime
//----------------------------
function datetimeGet($date, $format){
//----------------------------
	switch($format){
		case "Y": return substr($date, 0, 4);
		case "m": return substr($date, 5, 2);
		case "d": return substr($date, 8, 2);
		case "H": return substr($date, 11, 2);
		case "i": return substr($date, 14, 2);
		case "s": return substr($date, 17, 2);
	}
}

# returns intval of date
//----------------------------
function date2int($date){
//----------------------------
	$int = 0;
	$int += intval(substr($date,8,2));
	$int += 100*intval(substr($date,5,2));
	$int += 10000*intval(substr($date,0,4));
	return $int;
}

# compares two dates
# -1 if d1 < d2
#  0 if d1 = d2
#  1 id d1 > d2
//----------------------------
function compareDates($d1, $d2){
//----------------------------
	$d1 = strtotime($d1);
	$d2 = strtotime($d2);
	if($d1 < $d2){
		return -1;
	}
	if($d1 == $d2){
		return 0;
	}
	return 1;
}

# returns the german name of the given month
//----------------------------
function monthname($m) {
	switch($m){
		case "01": return "Januar";
		case "02": return "Februar";
		case "03": return "März";
		case "04": return "April";
		case "05": return "Mai";
		case "06": return "Juni";
		case "07": return "Juli";
		case "08": return "August";
		case "09": return "September";
		case "10": return "Oktober";
		case "11": return "November";
		case "12": return "Dezember";
	}
	return "";
}


?>