Global space

(PHP 5 >= 5.3.0)

Without any namespace definition, all class and function definitions are placed into the global space - as it was in PHP before namespaces were supported. Prefixing a name with \ will specify that the name is required from the global space even in the context of the namespace.

Example #1 Using global space specification

namespace A\B\C;

/* This function is A\B\C\fopen */
function fopen() { 
/* ... */
$f = \fopen(...); // call global fopen
return $f;


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User Contributed Notes 2 notes

3 years ago
Included files will default to the global namespace.
namespace test {
'-',__NAMESPACE__,'-<br />';

echo '-',__NAMESPACE__,'-<br />';

Results of test.php:

xmarcos at gmail dot com
2 years ago
That's the expected behavior, you have to declare the namespace at the top of the file to "extend" it.

If you include a global namespaced file, it will operate on the global namespace.
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