php takes out the timestamps for Monday and Sunday

php tutorial to remove the timestamp on Monday and Sunday can take over the following two examples of the timestamp on Monday and Sunday can see a lot of things, to keep thinking Oh, the first custom time stamp out the specified date Better, but it's more practical to take out the second one on Monday and Sunday.
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function getmonsun () {
$ curtime = time ();

$ curweekday = date ('w');

// is 0 is the weekday
$ curweekday = $ curweekday? $ curweekday: 7;

$ curmon = $ curtime - ($ curweekday-1) * 86400;
$ cursun = $ curtime + (7 - $ curweekday) * 86400;

$ cur ['mon'] = $ curmon;
$ cur ['sun'] = $ cursun;

return $ cur;
}
$ cur = getmonsun ();

echo date ('ym-d', $ cur ['mon']);
echo "rn";
echo date ('ym-d', $ cur ['sun']);

// Method 2 uses php strtotime function

echo strtotime ('last monday');
echo '<br />';
echo strtotime ('next sunday');