PHP - Extending Class

Question

I\'ve done lots and lots of code in PHP that is object-oriented, but up until now, all of my classes have been, \"singular\", I suppose you can call it. I am in the process

Answer 1

You could try late static binding as mentioned below, or a singleton solution should work as well:

<?php
abstract class DatabaseObject {
  private $table;
  private $fields;

  protected function __construct($table, $fields) {
    $this->table = $table;
    $this->fields = $fields;
  }

  public function find_all() {
    return $this->find_by_sql('SELECT * FROM ' . $this->table);
  }
}

class Topics extends DatabaseObject {
  private static $instance;

  public static function get_instance() {
    if (!isset(self::$instance)) {
      self::$instance = new Topics('master_cat', array('cat_id', 'category'));
    }

    return self::$instance;
  }
}

Topics::get_instance()->find_all();

Answer 2

You should look into the concept of Late Static Binding in PHP. This allows you to access a static constant or function from the class that was called.