<?php
 class ent_tax_class { public $data; public $previous; public function __construct($tax_class_id=null) { if ($tax_class_id !== null) { $this->load($tax_class_id); } else { $this->reset(); } } public function reset() { $this->data = []; $fields_query = database::query( "show fields from ". DB_TABLE_PREFIX ."tax_classes;" ); while ($field = database::fetch($fields_query)) { $this->data[$field['Field']] = database::create_variable($field); } $this->previous = $this->data; } public function load($tax_class_id) { if (empty($tax_class_id)) throw new Exception('Invalid tax class (ID: n/a)'); $this->reset(); $tax_class_query = database::query( "select * from ". DB_TABLE_PREFIX ."tax_classes
        where ". (preg_match('#^[0-9]+$#', $tax_class_id) ? "id = ". (int)$tax_class_id : "code = '". database::input($tax_class_id) ."'") ."
        limit 1;" ); if ($tax_class = database::fetch($tax_class_query)) { $this->data = array_replace($this->data, array_intersect_key($tax_class, $this->data)); } else { throw new Exception('Could not find tax class (ID: '. (int)$tax_class_id .') in database.'); } $this->previous = $this->data; } public function save() { if (empty($this->data['id'])) { database::query( "insert into ". DB_TABLE_PREFIX ."tax_classes
          (date_created)
          values ('". ($this->data['date_created'] = date('Y-m-d H:i:s')) ."');" ); $this->data['id'] = database::insert_id(); } database::query( "update ". DB_TABLE_PREFIX ."tax_classes
        set
          code = '". database::input($this->data['code']) ."',
          name = '". database::input($this->data['name']) ."',
          description = '". database::input($this->data['description']) ."',
          date_updated = '". ($this->data['date_updated'] = date('Y-m-d H:i:s')) ."'
        where id = ". (int)$this->data['id'] ."
        limit 1;" ); $this->previous = $this->data; cache::clear_cache('tax_classes'); } public function delete() { database::query( "delete from ". DB_TABLE_PREFIX ."tax_classes
        where id = ". (int)$this->data['id'] ."
        limit 1;" ); $this->reset(); cache::clear_cache('tax_classes'); } } 