PHP tell if a timestamp lies anywhere in the previousDay-CodePudding

Currently I am doing this to take the difference in days for two timestamps

function getDifferenceInDaysTillNow($timestamp) {
    try {
      $streakLastAwardedAtDateTime = DateTime::createFromFormat('U', $timestamp);
      $streakLastAwardedAtDateTime->setTimezone(new DateTimeZone('Asia/Kolkata'));

      $nowDateTime = new DateTime();
      $nowDateTime->setTimezone(new DateTimeZone('Asia/Kolkata'));

      $diff = $streakLastAwardedAtDateTime->diff($nowDateTime);
      return $diff->format('%a');
    }catch(Exception $e) {
      throw new Exception($e);
    }
  }

PHP Fiddle for the above approach

This gives a difference of 1 (1day) if the timestamps have 24hours difference.

But I just want to know if a timestamp lies in the previous day. For example it can just be a difference of 2hours or 6hours doesn't matter.

I want to return a Boolean (true or false) telling if the provided timestamp lies in the previousDay or not.

Any help is appriciated. Thank you.

CodePudding user response：

For this, you can simply check if the y or m property is greater than 0. If yes, return false. If the d difference is greater than 1, then also we need to return false since the difference is more than 1 day.

Additional check is to make sure the timestamp isn't the same day as today.

<?php
function getDifferenceInDaysTillNow($timestamp) {
    try {
      $streakLastAwardedAtDateTime = DateTime::createFromFormat('U', $timestamp);
      $streakLastAwardedAtDateTime->setTimezone(new DateTimeZone('Asia/Kolkata'));
  
      $nowDateTime = new DateTime();
      $nowDateTime->setTimezone(new DateTimeZone('Asia/Kolkata'));
  
      // check difference between lastStreakAward and now
      $diff = $streakLastAwardedAtDateTime->diff($nowDateTime);
      if($diff->y > 0 || $diff-> m > 0 || $diff->d > 1) return false;
      return date("Y-m-d", $timestamp) != date("Y-m-d");
    }catch(Exception $e) {
        throw new Exception($e);
    }
}

$timestamp = 1670211229; // Monday, 5 December 2022 09:03:49 GMT 05:30
var_dump(getDifferenceInDaysTillNow($timestamp));

Online Demo

CodePudding user response：

A DateTime object is created from the timestamp, then converted to the correct time zone with setTimeZone and the time is set to 00:00. Then it can be compared directly with 'yesterday'.

$timestamp = 1670211229;  //5 December 2022 09:03:49

$timeZone = new DateTimeZone('Asia/Kolkata');
$date = date_create('@'.$timestamp)
  ->setTimeZone($timeZone)
  ->setTime(0,0,0,0)
;
$isTimeStampFromYesterday = ($date == date_create('yesterday',$timeZone));