To demonstrate Objects in PHP I put together a calendar include.

Screen Shot 2014-03-05 at 21.48.35

View Demo.

The calendar was created in a PHP file to use as an include. The code was as follows:

<?php
class DisplayCal
{
	public $day;
	public $month;
	public $year;
	public $timestamp;
	private $prevYearNav;
	private $nextYearNav;
	private $prevYear;
	private $nextYear;
	private $prevMonth;
	private $nextMonth;
	private $dayOfMonth;
	private $fullMonth;
	private $noMonth;
	private $firstDayTimeStamp;
	private $dateArray;
	private $firstDay;
	private $lengthMonth;
	private $totalSlots;
	private $endSlots;
	private $addToEnd;
	private $gridLength;
	private $displayHTML;

	public function __construct($d = 0, $m = 0, $y = 0){

			if($d == 0){
				$this->day = date("j");
			}else{
				$this->day = $d;
			}
			if($m == 0){
				$this->month = date("n");
			}else{
				$this->month = $m;
			}

			if($y == 0){
				$this->year = date("Y");
			}else{
				$this->year = $y;
			}
			########## build values #############
			$this->prevYearNav= $this->year -1;
			$this->nextYearNav= $this->year + 1;
			$this->prevYear= $this->year;
			$this->nextYear= $this->year;
			$this->prevMonth= $this->month-1;
			$this->nextMonth= $this->month+1;
			if ($this->prevMonth == 0 ) {
				$this->prevMonth= 12;
			    $this->prevYear = $this->year - 1;
			}
			if ($this->nextMonth == 13 ) {
				 $this->nextMonth = 1;
			     $this->nextYear = $this->year + 1;
			}

			$this->timestamp = mktime(0,0,0,$this->month,$this->day,$this->year);
			$this->dayOfMonth = date('j',$this->timestamp);
			$this->fullMonth = date('F',$this->timestamp);
			$this->noMonth = date('n',$this->timestamp);
			$this->firstDayTimeStamp = mktime(0,0,0,$this->noMonth,1,$this->year);
			$this->dateArray = getdate($this->firstDayTimeStamp );
			$this->firstDay = $this->dateArray['wday'];
			if($this->firstDay == 0){
				$this->firstDay = 6;
			}else{
				$this->firstDay--;
			}
			$this->lengthMonth = date('t',$this->timestamp);
			$this->totalSlots = $this->firstDay + $this->lengthMonth;
			$this->totalSlots--;
			$this->endSlots = $this->totalSlots % 7;
			$this->addToEnd = 7 - $this->endSlots;
			$this->gridLength = $this->totalSlots + $this->addToEnd;

	}

	public function displayCal(){

		$this->displayHTML = "<table>";
		$this->displayHTML .= "<tr><td colspan=\"7\" class=\"center\">{$this->fullMonth} - {$this->year}</td></tr>";
		$this->displayHTML .= "<tr class=\"mainCal\"><td>M</td><td>T</td><td>W</td><td>T</td><td>F</td><td>S</td><td>S</td></tr>";

		for ($i=0; $i<$this->gridLength; $i++) {
			if(($i % 7) == 0 ){
				$this->displayHTML .=  "<tr>";
			}
			if($i < $this->firstDay || ($i) > ($this->totalSlots)){
				$this->displayHTML .=  "<td>-</td>";
			}else{
				if(($i - $this->firstDay + 1) == $this->day){
					$this->displayHTML .=  "<td><span class=\"pickedDay\">". ($i - $this->firstDay + 1) . "</span></td>";
				}else{
					if(($i % 7) == 6){
						$this->displayHTML .=  "<td class=\"sun\">". ($i - $this->firstDay + 1) . "</td>"	;
						}else{
						$this->displayHTML .=  "<td>". ($i - $this->firstDay + 1) . "</td>";
					}
				}
			}
			if(($i % 7) == 6 ){
				$this->displayHTML .=  "</tr>";
			}
		}

		$this->displayHTML .= "<tr class=\"mainCal\">";
		$this->displayHTML .= "<td><a href=\"{$_SERVER['PHP_SELF']}?month={$this->month}&year={$this->prevYearNav}\">&lt;</a></td>";
		$this->displayHTML .= "<td colspan=\"5\">Years</td>";
		$this->displayHTML .= "<td><a href=\"{$_SERVER['PHP_SELF']}?month={$this->month}&year={$this->nextYearNav}\">&gt;</a></td>";
		$this->displayHTML .= "</tr>";
		$this->displayHTML .= "<tr class=\"mainCal\">";
		$this->displayHTML .= "<td><a href=\"{$_SERVER['PHP_SELF']}?month={$this->prevMonth}&year={$this->prevYear}\">&lt;</a></td>";
		$this->displayHTML .= "<td colspan=\"5\">Months</td>";
		$this->displayHTML .= "<td><a href=\"{$_SERVER['PHP_SELF']}?month={$this->nextMonth}&year={$this->nextYear}\">&gt;</a></td>";
		$this->displayHTML .= "</tr></table>";

		return $this->displayHTML;

	}

}
?>

This was then included on the page with:

<?php
include('table-cal.php');

if(!isset($_GET["day"])){
	$_GET["day"] = date("j");
}
if(!isset($_GET["month"])){
	$_GET["month"] = date("n");
}
if(!isset($_GET["year"])){
	$_GET["year"] = date("Y");
}
$cDay = $_GET["day"];
$cMonth = $_GET["month"];
$cYear = $_GET["year"];

$obj = new DisplayCal($cDay, $cMonth, $cYear);

echo $obj->displayCal();

?>

And the resultant table was styled up with the following CSS:

table{
	font-family: Helvetica, arial, sans-serif;
	font-size: 13px;
	border-collapse: collapse;
	border: 1px solid #C24704;
	box-shadow: 4px 4px 4px #555;
}
th, td{
	padding:5px;
}
tr:nth-of-type(odd){
	background-color:#AD6C49;
	color:#fff;
}
.center{
	text-align:center;
}
tr.mainCal td{
	width:30px;
	text-align:center;
}
table a:link{
	text-decoration:none;
	color:#333;
}
table a:hover{
	color:#6C3;
}
.pickedDay{
	border:1px solid #f00;
	display:inline-block;
	padding:5px;
}
td.sun{
	color:#ff0000;
}

Now how many days is it until Christmas?

4 Thoughts to “Object Oriented PHP Calendar Include”

  1. Abdallah

    Awesome php artist, Nice work

  2. John

    Great guide.

    Do you know if it is possible to make all Sundays marked with red?

    Many thanks in advanced.

    1. admin

      Yes, it is. I have changed the class slightly and added a new style to colour the Sunday's red.

  3. Foxxy

    Hi,
    good job ! :].
    but i found 1 mistake : function displayCal() should be named as displayHTML.

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