准备的语句，而循环错误的PHP

Question

public function suggest(){
$SQL = "SELECT CategoryName FROM tb_category WHERE CategoryName LIKE CONCAT('%', ?, '%')";
$stmt = $this->_db->mysqli->prepare($SQL);
$stmt->bind_param("s", $this->querystring);
$stmt->execute();
$meta = $stmt->result_metadata();  
while($field = $meta->fetch_field())
    {     
     $parameters[] = &$row[$field->name];
     //print_r($parameters); 
    }

In my while -loop its giving the on thing again and again just checking the single row in db not the whole table I guess there isn't any problem with like operator here

Answer 1

Just to be sure i understood well:

while($field = $meta->fetch_field())
{     
 $parameters[] = &$row[$field->name];
 //print_r($parameters); 
}

Suppose you query returns 10 rows, does this while execute 10 times?

Try $row[$field->name]; instead of &$row[$field->name]; (without & )

finally fetch_field() returns the definitions of the columns you retreived with your query. As you select only CategoryName you are printing only CategoryName column definitions