- var_dump: documentation ( source)
<?php
$string = '2017-11-29T15:10:24.123+01:00';
$format = \DateTime::RFC3339_EXTENDED; // 'Y-m-d\TH:i:s.vP'
$date = new \DateTime($string);
$parsed = \DateTime::createFromFormat(
$date->format($format),
$format
);
var_dump($string);
var_dump($date->format($format));
echo "\n";
var_dump($date);
var_dump($parsed);
echo "\n";
echo "\n";
var_dump(\DateTime::getLastErrors());