Get the code for this week, last week, this month, last month, this quarter date with PHP

echo Date ("Ymd", Strtotime ("Now"), "\ n", Echo date ("Ymd", Strtotime ("1 week Monday"), "\ n", Echo date ("Ymd", Strtotime ( "-1 week Sunday")), "\ n", Echo date ("Ymd", Strtotime ("+0 Week Monday"), "\ n", Echo date ("Ymd", Strtotime ("+0 Week Sunday")  , "\ n"; Date (' n ') months//date ("W") weeks of the week//date ("T") this week the number of days Echo ' <br> last week:<br> '; Echo date ("Y-m-d h:i:s", mktime (0, 0, 0, Date ("M"), Date ("D")-date ("W") +1-7,date ("Y")), "\ n", Echo date ("Y-m-d h:i:s", Mktime (23,59,59,date ("M"), Date ("D")- Date ("W") +7-7,date ("Y")), "\ n"; Echo ' <br> this week:<br> '; Echo date ("Y-m-d h:i:s", mktime (0, 0, 0,date ("M"), date ("D")-date ("W") +1,date ("Y")), "\ n", Echo date ("Y-m-d h:i:s", Mktime (23,59,59,date ("M"), Date ("D")-date ("W") +7,date ( "Y")), "\ n"; Echo ' <br> last month:<br> '; Echo date ("Y-m-d h:i:s", mktime (0, 0, 0,date ("M") -1,1,date ("Y")), "\ n", Echo date (" Y-m-d h:i:s ", Mktime (23,59,59,date (" M "), 0,date (" Y "))," \ n "; Echo ' <br> this month:<br> '; Echo date (" Y-m-d h:i:s ", Mktime (0, 0, 0,date ("M"), 1,date ("Y")), "\ n"; Echo Date ("Y-m-d h:i:s", Mktime (23,59,59,date ("M"), Date ("T"), Date ("Y")), "\ n"; $getMonthDays = Date ("T", mktime (0, 0, 0,date (' n ') + (date (' n ')-1)%3,1,date ("Y"));//Last month of the quarter echo ' <br> this quarter: <br> '; Echo date (' y-m-d h:i:s ', mktime (0, 0, 0,date (' n ')-(date (' n ')-1)%3,1,date (' Y ')), "\ n"; Echo date (' y-m-d h:i : S ', Mktime (23,59,59,date (' n ') + (date (' n ')-1)%3, $getMonthDays, date (' Y '))), "\ n";

　　

Get the code for this week, last week, this month, last month, this quarter date with PHP