What does a \ (backslash) do in PHP (5.3+)?
namespaces, opcache, opcode, php
Solution
`\` (backslash) is the namespace separator in PHP 5.3.
A `\` before the beginning of a function represents the Global Namespace.
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.
Problem
What does a `\` do in PHP? For example, CSRF4PHP has `\FALSE`, `\session_id`, and `\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); } } ```