generic calendar class

[fci]

PHP Code:

class Generic_calendar {

    var $_date;
    var $_highlight;
    var $_start_secs;
    var $_total_days;
    var $_month;
    var $_month_text;
    var $_year;


    function Generic_calendar($date=0) {
        $this->_date =&$date;
        $this->_highlight = array();

        $this->_start_secs = 0;
        $this->_total_days = 0;

        $this->_month = 0;
        $this->_month_text = '';

        $this->_year  = 0;
    }

    function highlight($days=array()) {
        $this->_highlight =&$days;
    }

    function getPrevMonth() {
        return strtotime('-1 month', $this->_date);
    }
    function getNextMonth() {
        return strtotime('+1 month', $this->_date);
    }

    function getMonth() {
        if ($this->_month==0)
            $this->_month = date('n', $this->_date);
        return $this->_month;
    }
    
    function getMonthText() {
        if ($this->_month_text=='')
            $this->_month_text = date('M', $this->_date);
        return $this->_month_text;
    }
    
    function getYear() {
        if ($this->year==0)
            $this->_year = date('Y', $this->_date);
        return $this->_year;
    }

    function getUnixStart() {
        if ($this->_start_secs==0)
            $this->_start_secs = mktime(0, 0, 0, $this->getMonth(), 0, $this->getYear());
        return $this->_start_secs;
    }

    function getTotalDays() {
        if ($this->_total_days==0)
            $this->_total_days = date('t', $this->_date);
        return $this->_total_days; ;
    }

    function getDays() {
        $start_secs = $this->getUnixStart();
        $padding    = date('w', $start_secs)+1;
        $total_days = date('t', $this->_date);
        
        $days = array();

        $offset = 8 - $padding;
        $padding_end = 7 - $padding;
        
        if ($padding<7)
            while ($padding--)
                $days[] = array( 'day' => 0);


        for ($x=1; $x<=$total_days; $x++) {
            $days[] = array(
                'day' => $x,
                'selected' => in_array( $x, $this->_highlight),
                'new_week'  => $new_week = ($x==$offset) && ($offset += 7),
                'timestamp' => $start_secs,
            );
            $start_secs += 86400;
            
        }
        
        while ($padding_end--)
            $days[] = array( 'day' => 0);

        return $days;
    }

    function getDaysOfWeek($offset=0) {
        return array(
            0 + $offset => 'Sun', 
            1 + $offset => 'Mon', 
            2 + $offset => 'Tues', 
            3 + $offset => 'Wed', 
            4 + $offset => 'Thur', 
            5 + $offset => 'Fri', 
            6 + $offset => 'Sat', 
        );
    }

} 


example usage:

PHP Code:

    function dispCalendar($date, $days=array()) {

        $cal = new Generic_calendar($date);
        $cal->highlight($days);
        $days = $cal->getDays();
        //print_r($days);

        $next_month = $cal->getNextMonth();
        $prev_month = $cal->getPrevMonth();
        ?>
            <table id="calendar">
            <tr><td><a href="?date=<?php echo $prev_month; ?>">&lt;</a></td>
            <td colspan="5"><?php echo $cal->getMonthText().' '.$cal->getYear(); ?></td>
            <td><a href="?date=<?php echo $next_month; ?>">&gt;</a></td></tr>
            <tr>
        <?php
        foreach ($days as $day) {
            
            if ($day['new_week'] && $day['day']>1)
                print '</tr><tr>';

            $class = $day['selected'] ? 'selected' : 'normal';
            print '<td class="'.$class.'">';
                
            if ($day['day']==0) {
                print '&nbsp;';
            } else if ($day['selected']) {
                print '<a href="?date='.$day['timestamp'].'">'.$day['day'].'</a>';
            } else {
                print $day['day'];
            }

            print '</td>';
        }
        print '</tr></table>';
    }

?>
<style type="text/css"><!--
td { vertical-align: top; }
#calendar { text-align: center; font-size: 8pt;  }
#calendar .normal { }
#calendar .selected { color: #ff0000; }
#calendar a { color: #0000FF; }
--></style>
<?php

if ($_GET['date']) {
    $date = (int)$_GET['date'];
} else {
    $date = time();
}

dispCalendar($date, array(5,6,7));

?>

I like it when people tear my code apart if only to make me better.. so, feel free (and I know I should be commenting.. and I think the 'algorithm' I'm using for figuring out the start and end padding of a month is probably not so good).

[firepages]

Very nice , perfect for subclassing with more specific HTML/templated classes.