PHP gets the number of days of the month and the first and last day of the month, the first day of the month, and the last day implementation method

1.get the first day and last day of the month.
echo Date (' y-m-01 ', Strtotime ('-1 month '));
echo "<br/>";
echo Date (' Y-m-t ', Strtotime ('-1 month '));
echo "<br/>";
2.get the first day of the month and the last day.
$BeginDate =date (' y-m-01 ', Strtotime (date ("y-m-d"));
Echo $BeginDate;
echo "<br/>";
echo Date (' y-m-d ', Strtotime ("$BeginDate +1 month-1 Day");
echo "<br/>";
3.get the day of the year, month, day, and days.
echo "Total this month:". Date ("T"). " Days ";
echo "Current year". Date (' Y ');
echo "Current Month". Date (' m ');
echo "Current Date". Date (' d ');
echo "<br/>";
4.use functions and arrays to get the first day of the month and the last day, more practical
function Getthemonth ($date)
{
$firstday = Date (' y-m-01 ', Strtotime ($date));
$lastday = Date (' y-m-d ', Strtotime ("$firstday +1 month-1 Day");
Return Array ($firstday, $lastday);
}
$today = Date ("y-m-d");
$day =getthemonth ($today);
echo "The first day of the month:". $day [0]. "Last day of the month:". $day [1];
echo "<br/>";

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PHP gets the first and last day of the week of the specified date

code as follows	 
function GetDays ($day) { $lastday =date (' y-m-d ', Strtotime ("$day Sunday")); BR style= "margin:0px; padding:0px; " > $firstday =date (' y-m-d ', Strtotime ("$lastday-6 Days")); return Array ($firstday, $lastday); } Print_r (getdays (' 2012-06-2 '));

PHP Gets the days of the month and the first and last day of the month, the first day of the month, and the last day of the implementation method