无法在PHP中格式化UTC日期

Question

With a php app, I have a date like this '2019-07-22T04:44:43.843710438Z' and I can't figure out how to convert it to a date like this 7/22/2019 3:11 PM. strtotime just returns false, I tried a few time zones and nothing works. Here is my scratch pad of stuff I've been trying

 $timestamp = '2019-07-22T04:44:43.843710438Z';
//$reset = date_default_timezone_get();
//date_default_timezone_set('America/New_York');
//$stamp = strtotime($timestamp);
//date_default_timezone_set($reset);

$result = date_parse_from_format("j F Y G:i", $timestamp);

Answer 1

You'll have a much easier time (couldn't resist) working with the DateTime class (https://www.php.net/manual/en/class.datetime.php).

You're running into issues because the value you have isn't a timestamp so you can't use it like one.

The original time value uses nanosecond precision (9dp) which isn't supported by PHP. In order to use that time string with DateTime, you'll first have to truncate it to microseconds (6dp). It then has a method that will return your value in the desired format (https://www.php.net/manual/en/function.date.php).

$time = '2019-07-22T04:44:43.843710438Z';
$time_micro_precision = substr($time, 0, -4) . 'Z'; // drop the last three digits to move from nanoseconds to microseconds.

$datetime = new DateTime($time_micro_precision);
echo $datetime->format('j/n/Y g:i A');