编辑代码

<?php
namespace Myproject{
    const CONNECT_OK=1;
    class Connection{}
    function connect(){

    }

}
namespace AnotherProject{
    const CONNECT_ok=1;
    class Connection{
        start();
    }
    function connect(){}
}
namespace{
    session_start();
    $a=Myproject\connect();
    echo MyProject\Connection::start();
}
?>