PHP 动态函数调用（call_user_func_array 与 call_user_func）

为了让所写函数能够动态调用，我设计了这样一个函数：

    protected function _custom_list(&$model,$method,$param='') {
        //设置过滤
        if (!empty($this->filters)){
           $model->_setFilter($this->filters);
           if(!is_array($this->filters))
             $p->parameter .= urlencode($this->filters) . "&";//分页跳转的时候保证查询条件
        }
        $pagenation = $this->_get_pagenation();
        //获取记录总数用于计算分页
        if(!empty($param))
            $count =  count($model->$method($param));
        else
            $count =  count($model->$method());
        $records=array();
        if ($count > 0) {
            //生成分页代码
            $temp_param = array($count, $pagenation['r']); //dwz_page类的构造函数参数
            $p = $this->load->library('dwz_page', $temp_param);
            //页面分页序号显示
            $this->template->set('page', $p->show());
            //设置当前分页
            $model->limit($p->listRows, $p->firstRow);
            //设置排序
            if (!empty($pagenation['order']))
                $model->order_by($pagenation['order'], $pagenation['dir']);
            if(!empty($param))
                $records = $model->$method($param);
            else{
                $records = $model->$method();
            }
        }
            $this->template->set('numPerPage',$pagenation['r']);
            $this->template->set('records', $records);
            $this->template->set('postUrl', current_url());
            $this->template->set('totalCount',$count);
            $this->template->set('order', $pagenation['order']);
            $this->template->set('sort', $pagenation['dir']);
            $this->template->set('currentPage', !empty($pagenation['p']) ? $pagenation['p'] : 1);
    }

这样解决了当调用的函数有个参数的情况。

在使用的过程中发现调用的方法经常需要传递多个参数，且参数的数量不一定，这很正常，但如何解决这个问题？

查看PHP手册后，两个方法让我的疑惑直接消散：

mixed call_user_func_array ( callable $callback , array $param_arr )

mixed call_user_func ( callable $callback [, mixed $parameter [, mixed $... ]] )

调用某个类中的某个方法示例：

function foobar($arg, $arg2) {
    echo __FUNCTION__, " got $arg and $arg2\n";
}
class foo {
    function bar($arg, $arg2) {
        echo __METHOD__, " got $arg and $arg2\n";
    }
}


// Call the foobar() function with 2 arguments
call_user_func_array("foobar", array("one", "two"));

// Call the $foo->bar() method with 2 arguments
$foo = new foo;
call_user_func_array(array($foo, "bar"), array("three", "four"));

更新后的函数为：

protected function _custom_list2(&$model,$method,$param='') {
        //设置过滤
        if (!empty($this->filters)){
           $model->_setFilter($this->filters);
           if(!is_array($this->filters))
             $p->parameter .= urlencode($this->filters) . "&";//分页跳转的时候保证查询条件
        }
        $pagenation = $this->_get_pagenation();
        //获取记录总数用于计算分页

        if(!empty($param))
            $count= count((is_array ($param))?call_user_func_array(array($model,$method),$param):call_user_func(array($model,$method),$param));
            //$count =  count($model->$method($param));
        else
            $count =  count($model->$method());
        $records=array();
        if ($count > 0) {
            //生成分页代码
            $temp_param = array($count, $pagenation['r']); //dwz_page类的构造函数参数
            $p = $this->load->library('dwz_page', $temp_param);
            //页面分页序号显示
            $this->template->set('page', $p->show());
            //设置当前分页
            $model->limit($p->listRows, $p->firstRow);
            //设置排序
            if (!empty($pagenation['order']))
                $model->order_by($pagenation['order'], $pagenation['dir']);
            if(!empty($param))
                $records = (is_array ($param))?call_user_func_array(array($model,$method),$param):call_user_func(array($model,$method),$param);
            else{
                $records = $model->$method();
            }
        }
            $this->template->set('numPerPage',$pagenation['r']);
            $this->template->set('records', $records);
            $this->template->set('postUrl', current_url());
            $this->template->set('totalCount',$count);
            $this->template->set('order', $pagenation['order']);
            $this->template->set('sort', $pagenation['dir']);
            $this->template->set('currentPage', !empty($pagenation['p']) ? $pagenation['p'] : 1);
    }