PHP(5.3+)中\(反斜杠)的作用是什么?

What does a \ do in PHP?

PHP中\做什么?

For example, CSRF4PHP has \FALSE, \session_id, and \Exception:

例如，CSRF4PHP有\FALSE、\session_id和\Exception:

public function __construct($timeout=300, $acceptGet=\FALSE){
    $this->timeout = $timeout;
    if (\session_id()) {
        $this->acceptGet = (bool) $acceptGet;
    } else {
        throw new \Exception('Could not find session id', 1);
    }
}

3 个解决方案

#1

140

\ (backslash) is the namespace separator in PHP 5.3.

\(反斜杠)是PHP 5.3中的命名空间分隔符。

A \ before the beginning of a function represents the Global Namespace.

在函数的开始之前，就表示全局命名空间。

Putting it there will ensure that the function called is from the global namespace, even if there is a function by the same name in the current namespace.

将它放在那里将确保调用来自全局名称空间的函数，即使在当前名称空间中有相同名称的函数。

#2

To clarify potential confusion:

阐明潜在的混乱:

The backslash does not imply class inheritance.

反斜杠并不意味着类继承。

In the following, Animal, Dog, Shepherd don't have to be classes, but simply namespaces. Meaning something used to group names together to avoid naming collisions.

在下面的例子中，Animal, Dog, Shepherd并不一定是类，只是名称空间。意思是用来将名称分组在一起以避免命名冲突的东西。

$myDog = new \Animal\Dog\Shepherd\GermanShepherd();

The leading \ means Animal was declared in the global scope.

领头的动物是在全球范围内宣布的。

#3

The \ is used in PHP 5.3 for namespaces. See http://www.php.net/manual/en/language.namespaces.rationale.php for more information on namespaces and PHP.

PHP 5.3中使用的\用于命名空间。有关名称空间和PHP的更多信息，请参见http://www.php.net/manual/en/language.namespaces.rationale.php。

#1

140