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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 ; 
    }  
 ?>

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