Global space
(PHP 5 >= 5.3.0, PHP 7)
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
<?php
namespace?A\B\C;
/*?This?function?is?A\B\C\fopen?*/
function?fopen()?{?
?????/*?...?*/
?????$f?=?\fopen(...);?//?call?global?fopen
?????return?$f;
}?
?>← Using namespaces: Aliasing/Importing
Using namespaces: fallback to global function/constant →
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