Php: Convert Milliseconds to Date

php: convert milliseconds to date

You are already doing it right, 1227643821 is simply not 02-12-2008, it is indeed 25-11-2008.

converting milliseconds to amount of time string

PHP has a date function which do what you want:

date("H:i:s", '183547165');

It outputs:

09:19:25

PHP DATE

Convert milliseconds to minutes: Getting incorrect result

It's because date takes account of your local timezone. Try using gmdate instead:

$mil = 4007587;
$timestamp = $mil/1000;
// local timezone
echo date("g:i:s", $timestamp);
// UTC
echo gmdate("g:i:s", $timestamp);

Output

2:06:47
1:06:47

Getting date format m-d-Y H:i:s.u from milliseconds

php.net says:

Microseconds (added in PHP 5.2.2). Note that date() will always generate 000000 since it takes an integer parameter, whereas DateTime::format() does support microseconds if DateTime was created with microseconds.

So use as simple:

$micro_date = microtime();
$date_array = explode(" ",$micro_date);
$date = date("Y-m-d H:i:s",$date_array[1]);
echo "Date: $date:" . $date_array[0]."<br>";

Recommended and use dateTime() class from referenced:

$t = microtime(true);
$micro = sprintf("%06d",($t - floor($t)) * 1000000);
$d = new DateTime( date('Y-m-d H:i:s.'.$micro, $t) );

print $d->format("Y-m-d H:i:s.u"); // note at point on "u"

Note u is microseconds (1 seconds = 1000000 µs).

Another example from php.net:

$d2=new DateTime("2012-07-08 11:14:15.889342");

Reference of dateTime() on php.net

I've answered on question as short and simplify to author. Please see for more information to author: getting date format m-d-Y H:i:s.u from milliseconds

Converting milliseconds date to normal date

That timestamp is not in milliseconds so dividing it by 1000 is skewing your date.

$creation_date = new DateTime('@1468102548');
echo $creation_date->format('Y-m-d'); // Outputs 2016-07-09

Demo

PHP Converting milliseconds to date fails for specific millisecond (1425318722000)

It's the fact that you're using the 'U.u' mask, but the .u is lost from the value when the result is all 0s after the decimal for that division

for($ms = 1425318721999; $ms <= 1425318722001; ++$ms) {
    var_dump(DateTime::createFromFormat('U.u', sprintf('%14.3f', $ms/1000)));
}

Will work, because you're using sprintf() to force those zeroes to be retained after the decimal point

for($ms = 1425318721999; $ms <= 1425318722001; ++$ms) {
    var_dump(DateTime::createFromFormat('U', floor($ms/1000)));
}

would also work, but you'd lose the milliseconds precision

By way of some explanation:

public static DateTime DateTime::createFromFormat ( string $format , string $time [, DateTimeZone $timezone ] )

the createFromFormat() expects a string as the second argument, so PHP is loose casting the result of your division to a string, and a float value like 1425318722.000 will be cast to a string of "1425318722" with no decimal point or following zeroes, so it doesn't conform with the U.u mask which requires the decimal point and following digits

Converting timestamp to time ago in PHP e.g 1 day ago, 2 days ago...

Use example :

echo time_elapsed_string('2013-05-01 00:22:35');
echo time_elapsed_string('@1367367755'); # timestamp input
echo time_elapsed_string('2013-05-01 00:22:35', true);

Input can be any supported date and time format.

Output :

4 months ago
4 months ago
4 months, 2 weeks, 3 days, 1 hour, 49 minutes, 15 seconds ago

Function :

function time_elapsed_string($datetime, $full = false) {
    $now = new DateTime;
    $ago = new DateTime($datetime);
    $diff = $now->diff($ago);

    $diff->w = floor($diff->d / 7);
    $diff->d -= $diff->w * 7;

    $string = array(
        'y' => 'year',
        'm' => 'month',
        'w' => 'week',
        'd' => 'day',
        'h' => 'hour',
        'i' => 'minute',
        's' => 'second',
    );
    foreach ($string as $k => &$v) {
        if ($diff->$k) {
            $v = $diff->$k . ' ' . $v . ($diff->$k > 1 ? 's' : '');
        } else {
            unset($string[$k]);
        }
    }

    if (!$full) $string = array_slice($string, 0, 1);
    return $string ? implode(', ', $string) . ' ago' : 'just now';
}

Converting date (with milliseconds) into timestamp

Split string:

$date = '25 May 2016 10:45:53:001';
preg_match('/^(.+):(\d+)$/i', $date, $matches);
echo 'timestamp: ' . strtotime($matches[1]) . PHP_EOL;
echo 'milliseconds: ' . $matches[2] . PHP_EOL;
// timestamp: 1464162353 
// milliseconds: 001 

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