PHP DateTime 类命名空间
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PHP DateTime class Namespace
提问by Miguel Ribeiro
I'm using the symfony2 framework and I want to use the PHP's DateTime class (PHP version is 5.3).
我正在使用 symfony2 框架,我想使用 PHP 的 DateTime 类(PHP 版本为 5.3)。
Here the declaration:
这里的声明:
namespace SDCU\GeneralBundle\Entity;
class Country
{
public function __construct(){
$this->insertedAt = new DateTime();
}
}
But, when executing this constructor, I get an error saying that there's no "SDCU\GeneralBundle\Entity\DateTime" class. I've been searching around for DateTime's namespace but with no success... any idea?
但是,在执行此构造函数时,我收到一条错误消息,指出没有“SDCU\GeneralBundle\Entity\DateTime”类。我一直在寻找 DateTime 的命名空间,但没有成功......知道吗?
回答by str
DateTime
is in the global namespace, and as "class names always resolve to the current namespace name" you have to use \DateTime
.
DateTime
位于全局命名空间中,并且由于“类名始终解析为当前命名空间名称”,您必须使用\DateTime
.
Or import the package using:
或者使用以下命令导入包:
use \Datetime;
回答by Glavi?
Better solution for using classes in global namespaces is "use" keyword instead of "\" before class.
在全局命名空间中使用类的更好解决方案是“use”关键字而不是类之前的“\”。
namespace SDCU\GeneralBundle\Entity;
use \DateTime;
class Country
{
public function __construct(){
$this->insertedAt = new DateTime();
}
}