A simple PHP calendar function

Note: This post is over a year old and the content may no longer be accurate.

Recently I needed a calendar to display on a site. I looked around for something I could just cut and paste and drop in but I couldn’t find anything, but picked up something I had started about six months earlier and which had then fallen by the wayside. Now calendars aren’t actually very complicated, but they are a bit of a fiddle. The aim of this calendar function is therefore just to produce a skeleton calendar that I can drop into anything, you can stick anything you want in a calendar cell (day) – it doesn’t matter because all the code for content lives outside the calendar. There are css hooks for all the various cells, columns etc. so you can format it exactly how you want.

Calendar Screenshot

I wrote this as a CakePHP helper, but at the end of the day it is just a function and there is nothing Cake specific about it.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
 
<?php
 
function calendar($year = '', $month = '', $data = '', $base_url ='')
		{
			$str = '';
			$month_list = array('january', 'febuary', 'march', 'april', 'may', 'june', 'july', 'august', 'september', 'october', 'november', 'december');
			$day_list = array('Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun');
			$day = 1;
			$today = 0;
 
			if($year == '' || $month == '')// just use current yeear & month
				{
					$year = date('Y');
					$month = date('M');
 
				}
 
 
			$flag = 0;
 
			for($i = 0; $i < 12; $i++)
				{
					if(strtolower($month) == $month_list[$i])
						{
							if(intval($year) != 0)
								{
									$flag = 1;
									$month_num = $i + 1;
									break;
								}
						}
				}
 
 
			if($flag == 0)
				{
					$year = date('Y');
					$month = date('F');
					$month_num = date('m');
				}
 
 
 
			$next_year = $year;
			$prev_year = $year;
 
			$next_month = intval($month_num) + 1;
			$prev_month = intval($month_num) - 1;
 
			if($next_month == 13)
				{
					$next_month = 'january';
					$next_year = intval($year) + 1;
				}
			else
				{
					$next_month = $month_list[$next_month -1];
 
				}
 
			if($prev_month == 0)
				{
					$prev_month = 'december';
					$prev_year = intval($year) - 1;
				}
			else
				{
					$prev_month = $month_list[$prev_month - 1];
				}
 
 
 
			if($year == date('Y') && strtolower($month) == strtolower(date('F')))
				{	// set the flag that shows todays date but only in the current month - not past or future...
					$today = date('j');
				}
 
			$days_in_month = date("t", mktime(0, 0, 0, $month_num, 1, $year));
 
			$first_day_in_month = date('D', mktime(0,0,0, $month_num, 1, $year)); 
 
 
 
			$str .= '<table class="calendar">';
 
			$str .= '<thead>';
 
			$str .= '<tr><th class="cell-prev"><a href="' . $base_url . '/' . $prev_year . '/' . $prev_month . '">prev</a></th><th colspan="5">' . ucfirst($month) . ' ' . $year . '</th><th class="cell-next"><a href="' . $base_url . '/' . $next_year . '/' . $next_month . '">next</a></th></tr>';
 
 
 
			$str .= '<tr>';
				for($i = 0; $i < 7;$i++)
					{
						$str .= '<th class="cell-header">' . $day_list[$i] . '</th>';
					}
			$str .= '</tr>';
 
			$str .= '</thead>';
 
			// get the first day of the month
 
 
			$str .= '<tbody>';
 
 
 
				while($day < $days_in_month)
					{
						$str .= '<tr>';
 
 
 
								for($i = 0; $i < 7; $i ++)
									{
 
										$cell = '&nbsp;';
 
										if(isset($data[$day]))
											{
												$cell = $data[$day];
											}
 
										$class = '';
 
										if($i > 4)
											{
												$class = ' class="cell-weekend" ';
											}
 
 
										if($day == $today)
											{
												$class = ' class="cell-today" ';
											}
 
										if(($first_day_in_month == $day_list[$i] || $day > 1) && ($day < $days_in_month))
											{
												$str .= '<td ' . $class . '><div class="cell-number">' . $day . '</div><div class="cell-data">' . $cell . '</div></td>';
												$day++;
											}
										else
											{
 
														$str .= '<td ' . $class . '>&nbsp;</td>';
											}
									}
 
						$str .= '</tr>';
					}
 
 
			$str .= '</tbody>';
 
			$str .= '</table>';
 
			return $str;
		}
 
?>

The function parameters are as follows:

  • $year – expects a year in 4 digit e.g. 2007
  • $month – expects a month in english e.g. january
  • $data – an array containing the data for each day of the month e.g.

    $data[2] = ‘This is an entry for the 2nd day of the month’;
    $data[24] = ‘A link for the 24th of the month‘;

    The data is any HTML you want – it is up to you to generate it yourself before you hand it to the calendar.

  • $base_url – the url to send the back / foward links on to i.e. the address of page (the calendar expects to be in a mod re-written situation e.g. www.flipflops.org/calendar/2008/june)

CSS

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
/* calendar CSS */
 
table.calendar {width: auto; border: 1px solid #cccccc; border-collapse: collapse; margin: 0px; padding: 0px; background-color: #ffffff;}
table.calendar th {background-color: #eeeeee; text-transform: none; color: #444444; padding: 4px; text-align: center; border: 1px solid #eeeeee;}
 
table.calendar th.cell-prev {text-align: left;}
table.calendar th.cell-next {text-align: right;}
table.calendar th.cell-header {width: 70px; border-bottom: 1px solid #cccccc;}
table.calendar td.cell-today {background-color: #e2e8f6;} /* today in the current month */
table.calendar td.cell-weekend {background-color: #F3F5EB;}
table.calendar td {border: 1px solid #cccccc;}
 
table.calendar td div.cell-number {text-align: right; font-size: 8px; color: #444444; display: block;}
table.calendar td div {display: block; font-size: 10px; text-align: left;}
table.calendar thead th {border: 1px solid #cccccc;}

I use this as a CakePHP helper – if anyone is interested I’ll put up the supporting code showing how it might be used in a view / controller situation.

Electricity

Note: This post is over a year old and the content may no longer be accurate.

I saw two videos today both of them were disturbing in thier own ways the similarity – electricity.

The first one shows a guy with the worlds fastest electric drag bike – crashing it.

The second clip shows a student getting zapped with a tazer gun at a rally for US presidential candidate John Kerry.

Portfolio 2004 -2007

Note: This post is over a year old and the content may no longer be accurate.

A few sites from my Portfolio 2004 – 2007. Working as Senior Developer for COSMIC. I developed a PHP CMS framework called Rocket which is as the core of most of these sites.

The projects include:

  • E-commerce
  • Content Management Systems
  • Custom Programming & Database Integration

Stream :: Photographs

Note: This post is over a year old and the content may no longer be accurate.

We had the private view for the show last Friday and had quite a good turnout – over 250 people saw the piece last weekend and I had some great feedback.

(Click on the image to see the gallery of the photographs)