Using namespacesGlobal space
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;
}
?>
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