如何通过定制回调）3个参数（ - 笨

Question

配置/ login_rules.php

这里的回调函数check_email_existence

我想传递三个参数，这些参数（电子邮件，表，字段）

<?php 


/** 
* SETTING VALIDATION RULES FOR THE LOGIN FORM 
*/ 

$config['login_settings'] = array(

     array(
       'field' => 'password', 
       'label' => 'Password', 
       'rules' => 'required|trim|min_length[6]|max_length[20]|xss_clean', 
       'errors' => array(
         'required' => 'You must provide a %s.', 
       ), 
     ), 

     array(
       'field' => 'email', 
       'label' => 'Email', 
       'rules' => 'required|trim|valid_email|xss_clean|check_email_existence' 
     ) 
); 
?> 

我已经扩展了表单验证辅助库/ MY_Form_validation.php

<?php 

if (! defined('BASEPATH')) exit('No direct script access allowed'); 

    class MY_Form_validation extends CI_Form_validation { 

     protected $CI; 

     public function __construct($config = array()) 
     { 
       parent::__construct($config); 

       $this->CI =& get_instance(); 
     } 



     function check_email_existence($email,$table,$field) { 

      $this->CI->form_validation->set_message('check_email_existence', 'This %s id is not registered.'); 
      $query = $this->CI->db->query("SELECT COUNT(*) AS count FROM $table WHERE $field = '".$email."' "); 
      $row = $query->row(); 
      return ($row->count > 0) ? 'success' : 'failure'; 

     } 


}//class 

?> 

Answer 1

的回调函数接受两个参数：（$ POSTDATA，$ PARAM）。

$ PARAM接收无论你通过定义为规则的参数[...]规则的名称后：

'rules' => 'required|trim|valid_email|xss_clean|check_email_existence[table,field]' 

function check_email_existence($email, $param) { 
    // extract table and field from $param 
...