[PHP] 날짜관련 - date()/strtotime()

★ 날짜 표시

date () - string date( string $format[,int $timestamp] )
- 값 미입력시 기본값은 time()

echo date ("Y-m-d", time());   // 2020-05-15 (현재날짜)


★ 날짜 더하기 빼기

strtotime() - int strtotime( string $time[,int $now=time()] )
 = +1 day, -1 week 등 가능

echo date("Y-m-d", strtotime("+1 week"));//2020-05-22  //현재날짜 + 7일
echo date("Y-m-d", strtotime("2020-05-01+1 week"));//2020-05-08  //정한 날짜 + 7일