CI (Codeigniter) Setting enhanced configuration class example, cicodeigniter_PHP tutorial

CI (Codeigniter)'s Setting enhanced configuration class example, cicodeigniter

This article describes the Codeigniter's Setting enhanced configuration class example. Share it with everyone for your reference, the details are as follows:

This enhanced configuration class is suitable for projects that require more flexible configuration items. It can realize preloading configuration, group configuration, single item retrieval, addition, deletion and modification of configuration without changing the config document.

Use:

Where needed
Copy code The code is as follows: $this->load->library('setting');
For preloaded items, you can use to copy the code The code is as follows: $this->config->item(); to obtain
For temporary retrieval items, you can use to copy the code The code is as follows: $this->setting->item(); to obtain

First, create the data table

CREATE TABLE `system_settings` (
 `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
 `key` varchar(64) NOT NULL DEFAULT '',
 `value` mediumtext NOT NULL,
 `group` varchar(55) NOT NULL DEFAULT 'site',
 `autoload` enum('no','yes') NOT NULL DEFAULT 'yes',
 PRIMARY KEY (`id`,`key`),
 KEY `name` (`key`),
 KEY `autoload` (`autoload`)
) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=utf8;

Then, create setting.php in the application/libraries directory with the following content

<&#63;php
if (!defined('BASEPATH'))
  exit('No direct script access allowed');
class Setting {
  private $_ci;
  private $settings_autoloaded;
  private $settings = array();
  private $settings_group = array();
  private $settings_db;
  public function __construct() {
    $this->_ci = &get_instance();
    $this->settings_db = $this->_ci->config->item('settings_table');
    $this->autoload();
  }
  // ------------------------------------------------------------------------
  // 华丽的分割线 正式开始
  // ------------------------------------------------------------------------
  /**
   * 从数据库获取所有自动加载的设置
   */
  public function autoload() {
    //如果存在则直接返回
    if (!empty($this->settings)) {
      return $this->settings;
    }
    //如果系统不存在数据表则返回false
    if (!$this->_ci->db->table_exists($this->settings_db)) {
      return FALSE;
    }
    //查询标记为自动加载的项
    $this->_ci->db->select('key,value')->from($this->settings_db)->where('autoload', 'yes');
    $query = $this->_ci->db->get();
    if ($query->num_rows() == 0) {
      return FALSE;
    }
    //循环写入系统配置
    foreach ($query->result() as $k => $row) {
      $this->settings[$row->key] = $row->value;
      $this->_ci->config->set_item($row->key, $row->value);
    }
    //标记会话，避免重复读库
    //$this->_ci->session->set_userdata('settings_autoloaded', TRUE);
    return $this->settings;
  }
  // ------------------------------------------------------------------------
  /**
   * 获取单个设定
   *
   * <code>
   * <&#63;php $this->settings->get('config_item');
   &#63;>
   * </code>
   */
  public function item($key) {
    if (!$key) {
      return FALSE;
    }
    //首先检查是否系统已经自动加载
    if (isset($this->settings[$key])) {
      return $this->settings[$key];
    }
    //查询数据库
    $this->_ci->db->select('value')->from($this->settings_db)->where('key', $key);
    $query = $this->_ci->db->get();
    if ($query->num_rows() > 0) {
      $row = $query->row();
      $this->settings[$key] = $row->value;
      return $row->value;
    }
    // 查询不到结果则查找系统config，返回值或者false
    return $this->_ci->config->item($key);
  }
  // ------------------------------------------------------------------------
  /**
   * 获取组配置
   */
  public function group($group = '') {
    if (!$group) {
      return FALSE;
    }
    $this->_ci->db->select('key,value')->from($this->settings_db)->where('group', $group);
    $query = $this->_ci->db->get();
    if ($query->num_rows() == 0) {
      return FALSE;
    }
    foreach ($query->result() as $k => $row) {
      $this->settings[$row->key] = $row->value;
      $arr[$row->key] = $row->value;
    }
    return $arr;
  }
  // ------------------------------------------------------------------------
  /**
   * 更改设置
   */
  public function edit($key, $value) {
    $this->_ci->db->where('key', $key);
    $this->_ci->db->update($this->settings_db, array('value' => $value));
    if ($this->_ci->db->affected_rows() == 0) {
      return FALSE;
    }
    return TRUE;
  }
  // ------------------------------------------------------------------------
  /**
   * 新增设置
   */
  public function insert($key, $value = '', $group = 'addon', $autoload = 'no') {
    // 检查是否已经被添加的设置
    $this->_ci->db->select('value')->from($this->settings_db)->where('key', $key);
    $query = $this->_ci->db->get();
    if ($query->num_rows() > 0) {
      return $this->edit($key, $value);
    }
    $data = array('key' => $key, 'value' => $value, 'group' => $group, 'autoload' => $autoload, );
    $this->_ci->db->insert($this->settings_db, $data);
    if ($this->_ci->db->affected_rows() == 0) {
      return FALSE;
    }
    return TRUE;
  }
  // ------------------------------------------------------------------------
  /**
   * 删除设置
   */
  public function delete($key) {
    $this->_ci->db->delete($this->settings_db, array('key' => $key));
    if ($this->_ci->db->affected_rows() == 0) {
      return FALSE;
    }
    return TRUE;
  }
  // ------------------------------------------------------------------------
  /**
   * 删除设置组及成员配置
   */
  public function delete_group($group) {
    $this->_ci->db->delete($this->settings_db, array('group' => $group));
    if ($this->_ci->db->affected_rows() == 0) {
      return FALSE;
    }
    return TRUE;
  }
}
/* End of file Setting.php */
/* Location: ./application/libraries/Setting.php */

Finally, open application/config/config.php and add

/**
 * 系统配置表名
 */
$config['settings_table'] = "system_settings";

I hope this article will be helpful to everyone’s PHP program design based on the Codeigniter framework.

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