$year<\/code>, but it would be good practice to check that they were valid if you were to use a calendar in your program.<\/p>\nSo, the first code we’ll write is an empty function definition:<\/p>\n
<?php\r\nfunction showMonth($month, $year)\r\n{\r\n}\r\n?><\/pre>\nNow it’s time that we actually do some work! We’ll start by figuring out a timestamp that corresponds to sometime in that month. It’s not too important that we’re precise here, so we will use the mktime()<\/code> function, and get the time at 12:00:00 on the 1st of the month. We can then use the date()<\/code> function to tell us the number of days in that month by passing the format string \"t\"<\/code> along with our timestamp $date<\/code>. Next, we can use date()<\/code> to tell us what day of the week the 1st of the month is (remembering that we’ve set $date<\/code> to a time on the 1st of the month) by passing the \"w\"<\/code> format string to it which returns an integer value of 0<\/code> to 6<\/code> (0<\/code> is Sunday, etc) – we’ll store this in $offset<\/code> – with the timestamp in $date<\/code>. Lastly, we’ll declare a variable $rows<\/code>, which keeps count of the number of rows in the calendar, and initialise it to 1<\/code>. The code for this part is below:<\/p>\n<?php\r\n$date = mktime(12, 0, 0, $month, 1, $year);\r\n$daysInMonth = date(\"t\", $date);\r\n\/\/ calculate the position of the first day in the calendar (sunday = 1st column, etc)\r\n$offset = date(\"w\", $date);\r\n$rows = 1;\r\n?><\/pre>\nNext, we’ll display some HTML which will begin the display of the calendar. There’s not much PHP in this: just something to display the month as text followed by the year (eg July 2005) in a heading. What the HTML does is to display a heading, then start the table code to display the calendar, here we display the first row which contains column headings for each week day, Sunday to Saturday.<\/p>\n
<?php\r\necho \"<h1>Displaying calendar for \" . date(\"F Y\", $date) . \"<\/h1>\\n\";\r\necho \"<table border=\\\"1\\\">\\n\";\r\necho \"\\t<tr><th>Su<\/th><th>M<\/th><th>Tu<\/th><th>W<\/th><th>Th<\/th><th>F<\/th><th>Sa<\/th><\/tr>\";\r\necho \"\\n\\t<tr>\";\r\n?><\/pre>\nNote that the last line in the above code block starts the first row of date entries in the calendar, also \\n<\/code> and \\t<\/code> represent a new line and tab respectively – we’re only using these so that if you view the source code of the finished page, it is much more readable.<\/p>\nNow we can begin filling the cells in the table. There are going to be 3 stages to this: first is filling in blank cells before the start of the month, then filling in the numbers 1, 2.. until the end of the month and lastly we have to pad the from the end of the month until the end of the last row (if you don’t understand then look at a calendar: there are probably blank spaces before the first day and after the last day of the month).<\/p>\n