Rfc3339.php
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Rfc3339.php
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	<?php

	namespace JsonSchema;

	class Rfc3339
	{
	const REGEX = '/^(\d{4}-\d{2}-\d{2}[T ]{1}\d{2}:\d{2}:\d{2})(\.\d+)?(Z\|([+-]\d{2}):?(\d{2}))$/';

	/**
	* Try creating a DateTime instance
	*
	* @param string $string
	*
	* @return \DateTime\|null
	*/
	public static function createFromString($string)
	{
	if (!preg_match(self::REGEX, strtoupper($string), $matches)) {
	return null;
	}

	$dateAndTime = $matches[1];
	$microseconds = $matches[2] ?: '.000000';
	$timeZone = 'Z' !== $matches[3] ? $matches[4] . ':' . $matches[5] : '+00:00';
	$dateFormat = strpos($dateAndTime, 'T') === false ? 'Y-m-d H:i:s.uP' : 'Y-m-d\TH:i:s.uP';
	$dateTime = \DateTime::createFromFormat($dateFormat, $dateAndTime . $microseconds . $timeZone, new \DateTimeZone('UTC'));

	return $dateTime ?: null;
	}
	}