src/Api/TimestampShape.php
public static function format($value, $format)
    {
        if ($value instanceof \DateTime) {
            $value = $value->getTimestamp();
        } elseif (is_string($value)) {
            $value = strtotime($value);
        } elseif (!is_int($value)) {
            throw new \InvalidArgumentException('Unable to handle the provided'
                . ' timestamp type: ' . gettype($value));
        }

        switch ($format) {
            case 'iso8601':
                return gmdate('Y-m-d\TH:i:s\Z', $value);
            case 'rfc822':
                return gmdate('D, d M Y H:i:s \G\M\T', $value);
            case 'unixTimestamp':
                return $value;
            default:
                throw new \UnexpectedValueException('Unknown timestamp format: '
                    . $format);
        }
    }
public static function format($value, $format)
    {
        if ($value instanceof \DateTime) {
            $value = $value->getTimestamp();
        } elseif (is_string($value)) {
            $value = strtotime($value);
        } elseif (!is_int($value)) {
            throw new \InvalidArgumentException('Unable to handle the provided'
                . ' timestamp type: ' . gettype($value));
        }

        switch ($format) {
            case 'iso8601':
                return gmdate('Y-m-d\TH:i:s\Z', $value);
            case 'rfc822':
                return gmdate('D, d M Y H:i:s \G\M\T', $value);
            case 'unixTimestamp':
                return $value;
            default:
                throw new \UnexpectedValueException('Unknown timestamp format: '
                    . $format);
        }
    }
public static function format ( $ value , $ format ) { if ( $ value instanceof \ DateTime ) { $ value = $ value -> getTimestamp ( ) ; } elseif ( is_string ( $ value ) ) { $ value = strtotime ( $ value ) ; } elseif ( ! is_int ( $ value ) ) { throw new \ InvalidArgumentException ( 'Unable to handle the provided' . ' timestamp type: ' . gettype ( $ value ) ) ; } switch ( $ format ) { case 'iso8601' : return gmdate ( 'Y-m-d\TH:i:s\Z' , $ value ) ; case 'rfc822' : return gmdate ( 'D, d M Y H:i:s \G\M\T' , $ value ) ; case 'unixTimestamp' : return $ value ; default : throw new \ UnexpectedValueException ( 'Unknown timestamp format: ' . $ format ) ; } }
Formats a timestamp value for a service.

@param mixed  $value  Value to format
@param string $format Format used to serialize the value

@return int|string
@throws \UnexpectedValueException if the format is unknown.
@throws \InvalidArgumentException if the value is an unsupported type.
Formats a timestamp value for a service .