guoyu07 / php-ns-quirk

PHP 名称空间的奇怪行为

PHP namespace quirk

Let's define three class, Lv\Foo, Lv\Common\Foo and Lv\Bar in Foo.php, CommonFoo.php and Bar.php.

The Lv\Bar extends the Lv\Common\Foo by using use Lv\Common\Foo and extends Lv\Common\Foo's alias Foo.

And then, in app.php, if we make an instance of Lv\Foo, and then try to make an instance of Lv\Bar, the bellow error will be reported,

PHP Fatal error:  Cannot use Lv\Common\Foo as Foo because the name is already in use in ...

The expected result should be that the Lv\Common\Foo's alias Foo, which is in the script CommonFoo.php with the Lv namespace will not confilict the Lv\Foo.