File: project.php

namespace Project;
class Table {
  public static function get() {
    echo "Project.Table.Get\n";
  }
}

File: app.php

namespace App;

include "project.php";
use Project\Table as ProjectTable;

class Table {
  public static function get() {
    echo "App.Table.Get\n";
  }
}

ProjectTable::get();