PHP Method for getting dates corresponding to week week date week start and end dates

This article illustrates the method of PHP to get the date corresponding to week, week date, week start and end date. Share it for your reference, as follows:

/*
 *  Gets the week corresponding to the date 
 *  Parameter $date Is the date data entered in the format as: 2018-6-22
 */
function get_week($date)
{
  // Cast date format 
  $date_str = date('Y-m-d', strtotime($date));
  // Encapsulate into an array 
  $arr = explode("-", $date_str);
  // Parameter assignment 
  // Year 
  $year = $arr[0];
  // Month, output 2 Bit integer, not enough 2 Bit right alignment 
  $month = sprintf('%02d', $arr[1]);
  // Day, output 2 Bit integer, not enough 2 Bit right alignment 
  $day = sprintf('%02d', $arr[2]);
  // The default assignment of time division and second is 0 ; 
  $hour = $minute = $second = 0;
  // Convert to timestamp 
  $strap = mktime($hour, $minute, $second, $month, $day, $year);
  // Get the numeric day of the week 
  $number_wk = date("w", $strap);
  // Custom week array 
  $weekArr = array("0", "1", "2", "3", "4", "5", "6");
  // Gets the week corresponding to the number 
  return $weekArr[$number_wk];
}
/**
 *  Get 1 Day of the week 
 * @param $time  Time stamp 
 * @param $format  Conversion format 
 */
function get_week($time, $format = "Y-m-d") {
  $week = date('w',$time);
  $weekname=array(' Week 1',' Week 2',' Week 3',' Week 4',' Week 5',' Week 6',' Sunday ');
  // Ranked last on Sunday 
  if(empty($week)){
    $week=7;
  }
  for ($i=0;$i<=6;$i++){
   　　 $data[$i]['date'] = date($format,strtotime( '+'. $i+1-$week .' days',$time));
   　　 $data[$i]['week'] = $weekname[$i];
  }
  return $data;
}
/*
 *  Get the start time and end time of a week 
 * time  Time 
 * first  Means weekly week 1 Is the start date  0 Indicates that every Sunday is the start date 
 */
function getWeekMyActionAndEnd($time = '', $first = 1)
{
  // Current date 
  if (!$time) $time = time();
  $sdefaultDate = date("Y-m-d", $time);
  //$first =1  Means weekly week 1 Is the start date  0 Indicates that every Sunday is the start date 
  // Gets the day ordinal of the current week   Sunday is  0  Week 1 To the week 6 Yes  1 - 6
  $w = date('w', strtotime($sdefaultDate));
  // Gets the start date of the week, if $w Yes 0 Is Sunday, minus  6  Days 
  $week_start = date('Y-m-d', strtotime("$sdefaultDate -" . ($w ? $w - $first : 6) . ' days'));
  // End of week date 
  $week_end = date('Y-m-d', strtotime("$week_start +6 days"));
  return array("week_start" => $week_start, "week_end" => $week_end);
}

PS: Here are some time and date related tools for your reference:

Online date/day calculator:
http://tools.ofstack.com/jisuanqi/date_jisuanqi

Online date calculator/difference days calculator:
http://tools.ofstack.com/jisuanqi/datecalc

Online Date-Day Difference Calculator:
http://tools.ofstack.com/jisuanqi/onlinedatejsq

Unix timestamp (timestamp) conversion tool:
http://tools.ofstack.com/code/unixtime

More readers interested in PHP can check the topic of this site: "php Date and Time Usage Summary", "PHP Array (Array) Operation Skills Encyclopedia", "PHP Basic Grammar Introduction Course", "PHP Operation and Operator Usage Summary", "php Object-Oriented Programming Introduction Course", "PHP Network Programming Skills Summary", "php String (string) Usage Summary", "php+mysql Database Operation Introduction Course" and "php Common Database Operation Skills Summary"

I hope this article is helpful to everyone's PHP programming.