douyu1990
douyu1990
2012-10-30 08:09

mysqli - mysqli_stmt :: bind_param()应该是一个参考

已采纳

This is my class code:

class DAL
{

public function paramtypez($val)
{
        $types = '';                        //initial sting with types
        foreach($val as $para) 
        {     
            if(is_int($para)) {
                $types .= 'i';              //integer
            } elseif (is_float($para)) {
                $types .= 'd';              //double
            } elseif (is_string($para)) {
                $types .= 's';              //string
            } else {
                $types .= 'b';              //blob and unknown
            }
        }
        return $types;
}

 public function execsql($query,$param)
{
    $conn=new mysqli("127.0.0.1","root","","sample");

    if($row=$conn->prepare($query))
    {
        array_unshift($param,array(DAL::paramtypez($param)));
        call_user_func_array(array($row, 'bind_param'), $param);

        $row->execute();
        return true;
    }
    else
    return false;

}
}

and is use this class like this:

$vars = new DAL();
$vars->execsql('insert into tesst (name,family,age) values(?,?,?)',array('mori','gre','25'));

but that's return me this error:

 Warning: Parameter 2 to mysqli_stmt::bind_param() expected to be a reference, value given in ..\htdocs\inc.php on line 30

how can fix this error? thanks for any help

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2条回答

  • doujia6433 doujia6433 9年前

    $param looks like this right before you pass it to call_user_func_array:

    [['ssi'],'mori','gre','25']
    

    This is incorrect. You should change this:

    array_unshift($param,array(DAL::paramtypez($param)));
    

    To this:

    array_unshift($param,DAL::paramtypez($param));
    
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  • dse55384 dse55384 9年前

    This is happening because you are giving an array when bind_param expects an actual reference:

    Try and see if this works:

    class DAL
    {
    
        public function paramtypez($val)
        {
                $types = '';                        //initial sting with types
                foreach($val as $para) 
                {     
                    if(is_int($para)) {
                        $types .= 'i';              //integer
                    } elseif (is_float($para)) {
                        $types .= 'd';              //double
                    } elseif (is_string($para)) {
                        $types .= 's';              //string
                    } else {
                        $types .= 'b';              //blob and unknown
                    }
                }
                return $types;
        }
    
        public function execsql($query,$param)
        {
    
            $conn=new mysqli("127.0.0.1","root","","sample");
    
            if($row=$conn->prepare($query))
            {
                array_unshift($param,array(DAL::paramtypez($param)));
                call_user_func_array(array($row, 'bind_param'), $this->makeValuesReferenced($param));
    
                $row->execute();
                return true;
            }
            else
            return false;
    
        }
    
    
        protected function makeValuesReferenced(&$arr)
        {
            $refs = array();
            foreach($arr as $key => $value)
                $refs[$key] = &$arr[$key];
            return $refs;
        }
    
    }
    
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