调整选择方法以接受多个参数 [英] Adapting a select method to accept more than one parameter

问题描述

我需要实现一个方法 select() 可以绑定一个或多个参数和另一个将结果返回到 index.php 的方法.

I need to implement a method select() that can bind one or more parameters and another method which will return the result to index.php.

从 index.php 调用的所需代码:

Desired code called from index.php:

echo $this->_results -> korisnik_id;

这是需要实现select()的数据库类.当前 Select() 函数接受一个参数...

this is the database class which need to implement select(). the present Select() function accepts one parameter...

DB::getInstance() -> Select('SELECT korisnik_id FROM korisnici WHERE korisnik_ime= ?', 's', 'Alex');

...但不多:

DB::getInstance() -> Select('SELECT korisnik_id FROM korisnici WHERE korisnik_ime= ? AND korisnik_grupa= ?','si', 'Alex', '1');

全班:

<?php
class DB{
    private static $_instance = null;
    private $_stmt,$_query,$_error=false,$_results,$count=0;

    public function __construct() {
        try{

            $this-> _stmt = new mysqli(Config::get('mysql/host'),Config::get('mysql/username'),Config::get('mysql/password'),Config::get('mysql/db'));
            if (mysqli_connect_errno()) {
                    printf("Connect failed: %s\n", mysqli_connect_error());
                    exit();
            }

        } catch (Exception $ex) {

        }

     }

     public static function getInstance(){

         if(!isset(self::$_instance)){
             self::$_instance = new DB();
         }
         return self::$_instance;
     }


     public function Select($query, $paramString = ''){
    $stmt = $this->_stmt->prepare($query);

    if (func_num_args() > 2){
        $parameters = func_get_args();

        array_shift($parameters); // remove the query from the list
        // Array needs to be bound by reference

        foreach ($parameters as $key=>&$value) {
            $parameters[$key] = &$value;

        }
       call_user_func_array(array($stmt, "bind_param"), $parameters);
    }
    $stmt->execute();
    $this->_results = $stmt->get_result();
    $stmt->close();

   $this->_results = $this->_results -> fetch_object();
    echo $this->_results -> korisnik_id;

}


}
?>

推荐答案

我觉得你已经很接近了.

I think you're pretty close.

用这样的东西代替你当前的 forach 循环怎么样:

How about something like this in the place of your current forach loop:

foreach ($parameters as $key=>&$value) {
            $this->_stmt->bindParam ($key, $value, PDO::PARAM_STR);

}

这篇关于调整选择方法以接受多个参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！