PHP5中文手册·Global space -- 追寻梦想＞编程乐园＞PHP 编程

Global 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;
    } 
?>


	PHP5中文手册 Using namespaces __NAMESPACE__ Namespaces PHP Manual Global 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; } ?>` Using namespaces __NAMESPACE__ Namespaces PHP Manual