service层构想

最新推荐文章于 2025-04-05 15:54:59 发布

原创最新推荐文章于 2025-04-05 15:54:59 发布 · 267 阅读

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#php

创建service层将业务逻辑及判断放到service层

1.创建service层

（1）让CI能够加载service,service目录放在application下，因为CI系统没有service，则在application/core下新建扩展MY_Service.php

class MY_Service
{

public function __construct()
{
    log_message('debug', "Service Class Initialized");
}
function __get($key)
{
    $CI = & get_instance();
    return $CI->$key;
}
}

2.扩展CI_Loader实现，加载service，在application/core下新建 MY_Loader.php文件：

class MY_Loader extends CI_Loader
{


 protected $_ci_services = array();
   /**
   * List of paths to load sercices from
    *
   * @var array
   * @access protected
   */
protected $_ci_service_paths  = array();

/**
 * Constructor
 * 
 * Set the path to the Service files
 */

public function __construct()
{
    parent::__construct();
    $this->_ci_service_paths = array(APPPATH);
}

/**
 * Service Loader
 * 
 * This function lets users load and instantiate classes.
* It is designed to be called from a user's app controllers.
*
* @param string the name of the class
* @param mixed the optional parameters
* @param string an optional object name
* @return void
 */
 
public function service($service = '', $params = NULL, $object_name = NULL)
{
    if(is_array($service))
    {
        foreach($service as $class)
        {
            $this->service($class, $params);
        }
        return;
    }
    if($service == '' or isset($this->_ci_services[$service])) {
        return FALSE;
    }
    if(! is_null($params) && ! is_array($params)) {
        $params = NULL;
    }
    $subdir = '';
    // Is the service in a sub-folder? If so, parse out the filename and path.
    if (($last_slash = strrpos($service, '/')) !== FALSE)
    {
            // The path is in front of the last slash
            $subdir = substr($service, 0, $last_slash + 1);
            // And the service name behind it
            $service = substr($service, $last_slash + 1);
    }
    foreach($this->_ci_service_paths as $path)
    {
        $filepath = $path .'service/'.$subdir.$service.'.php';
        if ( ! file_exists($filepath))
        {
            continue;
        }
        include_once($filepath);
        $service = strtolower($service);
        if (empty($object_name))
        {
            $object_name = $service;
        }
        $service = ucfirst($service);
        $CI = &get_instance();
        if($params !== NULL)
        {
            $CI->$object_name = new $service($params);
        }
        else
        {
            $CI->$object_name = new $service();
        }
        $this->_ci_services[] = $object_name;
        return;
    }
}
}

3简单例子实现：控制器中调用service ：

  <?php
 class User extends CI_Controller
 {
     public function __construct() 
     {

         parent::__construct();
          $this->load->service('user_service');
	}
  public function login()
  {
     $name = 'phpddt.com';
	    $psw = 'password';
	    print_r($this->user_service->login($name, $psw));
  }
}

service中调用model ：

 <?php
 	class User_service extends MY_Service
 	{
 		   public function __construct()
 		  {
 		        parent::__construct();
 			    $this->load->model('user_model');
 		  }
 		  public function login($name, $password)
 	   {
 		     $user = $this->user_model->get_user_by_where($name, $password);

 			  return $user;
 		 }
 }

model中你只跟db打交道：

<?php
	class User_model extends CI_Model
	{
		 public function __construct()
		  {
		   		parent::__construct();
		  }
		public function get_user_by_where($name, $password)
		  {
		    	 //$this->db
		
			 return array('id' => 1, 'name' => 'mckee');
		  }
	}

参考网址https://www.cnblogs.com/hellowzd/p/4674666.html