Php Programming Code Examples

Php > Calendar Code Examples

Calendar sample

Calendar sample

<?php 

function isLeapYear($year){ 
    // 1 januari 1900 is monday, use century-check only when 1 januari 1900 is monday; 
    if(($year % 100 == 0) and ($year % 400 != 0)) return(0); 
    if($year % 4 == 0) return(1); 
    return(0); 
} 

function getWeekDay($year, $month, $day){ 
    $dcm = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); 
    // 1 januari 1900 is sunday; 
    $gwdYear = 1899; 
    $gwdMonth = 12; 
    $gwdDay = 31; 
    // 1 januari 1900 is monday; 
    $gwdYear = 1899; 
    $gwdMonth = 12; 
    $gwdDay = 30; 

    $diffDays = 0; 
    $diffDays = $diffDays + $day; 
    for($m = (($year * 12) + $month) - 1; $m > (($gwdYear * 12) + $gwdMonth); $m--)    { 
        $y = (($m - 1) / 12); 
        $i = ($m % 12) + 12; 
        if(isLeapYear($y) == 1)         { 
            $dcm[1] = 29; $dcm[13] = 29; 
        }else{ 
            $dcm[1] = 28; $dcm[13] = 28; 
        } 
        $diffDays = $diffDays + $dcm[$i-1]; 
    } 
    $diffDays = $diffDays + ($dcm[$gwdMonth - 1] - $gwdDay); 
    $weekDay = ($diffDays % 7) - 2; 
    if($weekDay < 0) $weekDay = $weekDay + 7; 
    return($weekDay + 1); 
} 

function getDateNumber($year, $month, $day){ 
    $diffDays = 0; 
    for($y = 0; $y < $year; $y++)    { 
        $diffDays = $diffDays + 365; 
        if(isLeapYear($y) == 1) $diffDays = $diffDays + 1; 
    } 
    for($m = 1; $m < $month; $m++)    { 
        if($m == 1 or $m == 3 or $m == 5 or $m == 7 or $m == 8 or $m == 10 or $m == 12)    { 
            $diffDays = $diffDays + 31; 
        }else{ 
            $diffDays = $diffDays + 30; 
        } 
        if(isLeapYear($year) == 1 and $m == 2) $diffDays = $diffDays - 1; 
        if(isLeapYear($year) == 0 and $m == 2) $diffDays = $diffDays - 2; 
    } 
    $diffDays = $diffDays + $day; 
    return($diffDays); 
} 

function CalculateIsoWeekday($year, $month, $day){ 

// This function converts the weekday-numbers from the 
// standard function to an offset acc. to the ISO version 
// monday -> 0, ... , sunday -> 6 
$n = getWeekday($year, $month, $day); 
    return($n - 1); 
} 

function getWeekNumber($year, $month, $day){ 
    // The year value is preset with that of the input date 
    $YearInQuestion = $year; 
     
    // Calculate offset to monday from the input date 
    $InputDateOffset = CalculateIsoWeekday($year, $month, $day); 
     
    // Calculate offsets for the first/last day of the year 
    $January1Offset = CalculateIsoWeekday($YearInQuestion, 1, 1); 
    $December31Offset = CalculateIsoWeekday($YearInQuestion, 12, 31); 
     
    // If the input date is before the 4th of January and the year starts with 
    // a friday, saturday or sunday, the week belongs to the previous year 
    // if the entered date is not a monday or tuesday 
    if($month == 1 and $day < 4 and $January1Offset > 3 and $InputDateOffset > 1)    { 
        $YearInQuestion = $YearInQuestion - 1; 
    } 
    // If the input date is after the 28th of December and the year ends with 
    // a monday, tuesday or wednesday, then the week belongs to the following year 
    // if the entered date is not a saturday or sunday 
    if ($month == 12 and $day > 28 and $December31Offset < 3 and $InputDateOffset < 5)    { 
        $YearInQuestion = $YearInQuestion + 1; 
    } 
    // The 4th of January defines week #1 
    $January4 = getDatenumber($YearInQuestion, 1, 4); 
     
    // Offset to the monday of week #1 
    $FirstMondayOfYear = getDatenumber($YearInQuestion, 1, 4 - CalculateIsoWeekday($YearInQuestion, 1, 4)); 
     
    // The time range between the monday of week #1 and the monday 
    // of the week in question is divided by 7, plus 1 for the first week 
    $weeknum = (getDateNumber($year, $month, $day) - $InputDateOffset - $FirstMondayOfYear ) / 7 + 1; 
    return($weeknum);     
} 

function phpdate($year, $month, $day, $format){ 
    if($format == "mmmm")    { 
        if($month == 1) return("january"); 
        if($month == 2) return("february"); 
        if($month == 3) return("march"); 
        if($month == 4) return("april"); 
        if($month == 5) return("may"); 
        if($month == 6) return("june"); 
        if($month == 7) return("july"); 
        if($month == 8) return("august"); 
        if($month == 9) return("september"); 
        if($month == 10) return("october"); 
        if($month == 11) return("november"); 
        if($month == 12) return("december"); 
    } 
    if($format == "yyyy")    { 
        return($year); 
    } 
} 

function getCalendar() { 
    if($_GET["year"] == "") $year = date("Y"); else $year = $_GET["year"]; 
    if($_GET["month"] == "") $month = date("n"); else $month = $_GET["month"]; 
    if($_GET["day"] == "") $day = date("d"); else $day = $_GET["day"]; 
    $dow = array("mon", "tue", "wed", "thu", "fri", "sat", "sun"); 
    if(isLeapYear($year) == 1)    { 
        $dom = array(31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); 
    }else{ 
        $dom = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); 
    } 
    $calendar = "<center><table style='background : ThreedFace; border-style : outset; font-family : Verdana; font-size : 10pt;border-width : 2px;' >"; 
    $calendar .= "<tr>"; 
    $calendar .= "<th bgcolor=#000080 colspan='8'>"; 
    $calendar .= "<font color=white>C A L E N D A R</font>"; 
    $calendar .= "</th>"; 
    $calendar .= "</tr>"; 
    $calendar .= "<tr>"; 
    $calendar .= "<th><center>"; 
    $m = $month; 
    $y = $year - 1; 
    if($year != 1900) $calendar .= "<a style='text-decoration : none; color : #808080;' href='?year=" . $y . "&month=" . $m . "&day=" . 1 . "' ><font face=webdings>7</font></a>"; 
    if($month == 1) { 
        $m = 12; 
        $y = $year - 1; 
    }else{ 
        $m = $month - 1; 
        $y = $year; 
    } 
    if(!($year == 1900 and $month == 1)) $calendar .= "<a style='text-decoration : none; color : #808080;' href='?year=" . $y . "&month=" . $m . "&day=" . 1 . "' ><font face=webdings>3</font></a>"; 
    $calendar .= "</th>"; 
    $calendar .= "<th nowrap colspan='6'><center>"; 
    $calendar .= phpdate($year, $month, $day, "mmmm", $lang) . " " . phpdate($year, $month, $day, "yyyy", $lang); 
    $calendar .= "</th>"; 
    $calendar .= "<th><center>"; 
    if($month == 12){ 
        $m = 1; 
        $y = $year + 1; 
    }else{ 
        $m = $month + 1; 
        $y = $year; 
    } 
    $calendar .= "<a style='text-decoration : none; color : #808080;' href='?year=" . $y . "&month=" . $m . "&day=" . 1 . "' ><font face=webdings>4</font></a>"; 
    $m = $month; 
    $y = $year + 1; 
    $calendar .= "<a style='text-decoration : none; color : #808080;' href='?year=" . $y . "&month=" . $m . "&day=" . 1 . "' ><font face=webdings>8</font></a>"; 
    $calendar .= "</th>"; 
    $calendar .= "</tr>"; 
    $dayno = 2 - getWeekDay($year, $month, 1); 
    $daymin = 1; 
    $daymax = $dom[$month - 1]; 
    if($month == 1) {$daymaxl = 12;} else {$daymaxl = $month - 1;} 
    for($row = 1; $row <= 7; $row++)    { 
        for($col = 1; $col <= 8; $col++)        { 
            $calendar .= "<td style='border-color : black; border-width : 2px;' ><center>"; 
            // print weekday headers 
            if($row == 1 and $col != 1) { 
                $calendar .= "<font color=#000080>"; 
                $calendar .= $dow[$col-1-1]; 
                $calendar .= "</font>"; 
            } 
            // print weeknumbers 
            if($row != 1 and $col == 1)    {     
                $calendar .= "<font color=#008000>"; 
                if($dayno < $daymin){ 
                    $y = $year; 
                    if($month == 1) $m = 12; 
                    if($month != 1) $m = $month - 1; 
                    if($month == 1) $y = $year - 1; 
                    $d = ($dom[$daymaxl - 1]) + $dayno; 
                    $calendar .= sprintf("%02d",getWeekNumber($y, $m, $d)); 
                }else{ 
                    if($dayno > $daymax){ 
                        $y = $year; 
                        if($month == 12) $m = 1; 
                        if($month != 12) $m = $month + 1; 
                        if($month == 12) $y = $year + 1; 
                        $d = $dayno - $daymax; 
                        $calendar .= sprintf("%02d",getWeekNumber($y, $m, $d)); 
                    }else{ 
                        $calendar .= sprintf("%02d",getWeekNumber($year, $month, $dayno)); 
                    } 
                } 
                $calendar .= "</font>"; 
            } 
            // print day numbers 
            if($row > 1 and $col != 1){ 
                if($dayno < $daymin){ 
                    $calendar .= "<font color=#808080>"; 
                    $calendar .= ($dom[$daymaxl - 1]) + $dayno; 
                    $calendar .= "</font>"; 
                }else{ 
                    if($dayno > $daymax){ 
                        $calendar .= "<font color=#808080>"; 
                        $calendar .= $dayno - $daymax; 
                        $calendar .= "</font>"; 
                    }else{ 
                        $calendar .= $dayno; 
                    } 
                } 
                $dayno = $dayno + 1; 
            } 
            $calendar .= "</td>"; 
        } 
        $calendar .= "</tr><tr>"; 
    } 
    $calendar .= "</tr>"; 
    $calendar .= "</table>"; 
    return($calendar); 
} 

?> 
<html> 
<title>getCalendar()</title> 
<body bgcolor=#D0D0D0> 
<?php echo(getCalendar()); ?> 
</body> 

</html>