<?php
header('Content-Type: text/html; charset=utf-8');

function mostrar_form()
{
echo "”;
echo “Month:”;
echo “”;
echo “Year:”;
echo “”;
echo “”;
echo “”;

}

// Here you can translate the name of the months
function mes($m)
{
switch($m){
case “January”: return “Janeiro”; break;
case “February”: return “Fevereiro”; break;
case “Mars”: return “Março”; break;
case “April”: return “Abril”; break;
case “May”: return “Maio”; break;
case “June”: return “Junho”; break;
case “July”: return “Julho”; break;
case “August”: return “Agosto”; break;
case “September”: return “Setembro”; break;
case “Octuber”: return “Outubro”; break;
case “November”: return “Novembro”; break;
case “December”: return “Dezembro”; break;
}

}

function processa_form($mes, $dia, $ano)
{
$knowntide = strtotime(‘2010-04-28 03:00′); // Last known high tide–>
$current = date(‘U’, mktime(0, 0, 0, $mes,$dia, $ano));
$interval = (12 * 3600) + (21 * 60); // 12 hours and 50 minutes between high tides–>
$num_tides_passed = floor(($current – $knowntide) / $interval);
$last_tide = $knowntide + ($interval * $num_tides_passed);
$next_high = $last_tide + $interval; // 12 hours and 50 minutes between 2 high tides –>
$next_low = $last_tide + (6 * 3600) + (17 * 60); //

echo date(‘G:i’, $next_low),” Baixa-Mar “; // low tide
echo date(‘G:i’ , $next_high),” Preia-Mar “;//high tide
echo date(‘G:i’ , $next_low + $interval),” Baixa-Mar “;
echo date(‘G:i’ , $next_high + $interval),” Preia-Mar “;
}

mostrar_form();

if (empty($_POST['mes'])){
$date =time () ;
}
else
{
$month_year=$_POST['mes'].”/1/”.$_POST['ano'];
$date=strtotime($month_year);
}

//This gets today’s date

//This puts the day, month, and year in seperate variables
$day = date(‘d’, $date) ;
$month = date(‘m’, $date) ;
$year = date(‘Y’, $date) ;

//Here we generate the first day of the month
$first_day = mktime(0,0,0,$month, 1, $year) ;

//This gets us the month name
$title = date(‘F’, $first_day) ;

//Here we find out what day of the week the first day of the month falls on
$day_of_week = date(‘D’, $first_day) ;

//Once we know what day of the week it falls on, we know how many blank days occure before it. If the first day of the week is a Sunday then it would be zero
switch($day_of_week){
case “Sun”: $blank = 0; break;
case “Mon”: $blank = 1; break;
case “Tue”: $blank = 2; break;
case “Wed”: $blank = 3; break;
case “Thu”: $blank = 4; break;
case “Fri”: $blank = 5; break;
case “Sat”: $blank = 6; break;
}

//We then determine how many days are in the current month
$days_in_month = cal_days_in_month(0, $month, $year) ;

//Here we start building the table heads
echo “”;
echo ” “, mes($title), ” $year “;
echo “DomingoSegundaTerçaQuartaQuintaSextaSábado”;

//This counts the days in the week, up to 7
$day_count = 1;

echo “”;
//first we take care of those blank days
while ( $blank > 0 )
{
echo ” “;
$blank = $blank-1;
$day_count++;
}

//sets the first day of the month to 1
$day_num = 1;

//count up the days, untill we’ve done all of them in the month
while ( $day_num <= $days_in_month )
{
echo "”;
echo $day_num;
echo “”;
echo “”;
processa_form($month,$day_num, $year);
echo “”;
echo “”;
$day_num++;
$day_count++;

//Make sure we start a new row every week
if ($day_count > 7)
{
echo “”;
$day_count = 1;
}
}

//Finaly we finish out the table with some blank details if needed
while ( $day_count >1 && $day_count <=7 )
{
echo " “;
$day_count++;
}

echo “”;