EventMessageCompiler::getFieldFlatValue

static function getFieldFlatValue($value)
{
	$flatValue = '';
	if(is_array($value))
	{
		foreach($value as $v)
			$flatValue .= ($flatValue <> ''? ', ':'').static::getFieldFlatValue($v);
	}
	else
		$flatValue = $value;

	return $flatValue;
}