namespace

what is namespace

namespace is a indicator for file . you can use specific file with specific namespace . namespace keyword is namespace

• namespace live top level in the file . (first declare)
• case-insensitive
• sub directory with \ backslash

why use namespace

• escape name collision with others file/folder/code
• ability to use large file name with alias as very shortyly.

<?php
namespace User\Info;

class profile {
  function user() {
  echo("function name isn't case-sensitive");
  }
}

?>

how access namespace

• access by use keyword
• alias wirh as keyword

<?php
use User\Info;
use User\Info as client;
class Test{

}