Question

所以我在mysqli中进行了多重过滤搜索，您可以使用文本框，集合ID或类型ID进行搜索。

问题是，当使用搜索文本框时，它会返回一个

Call to a member function fetch_object() on boolean

但是当我输入字符串或单个字母时，它只会返回该错误。当我输入一个数字，例如1或2时，它可以很好地工作并带来正确的结果。 谢谢


`
     $whereClauses = array();
   if (! empty($_POST['search'])) $whereClauses[] =       'tblfurniture.product_name ='.'%'.mysql_real_escape_string($_POST['search']).'%';
if (! empty($_POST['collection'])) $whereClauses[] ='tblfurniture.COLID='.mysql_real_escape_string($_POST['collection']);
if (! empty($_POST['type'])) $whereClauses[] = 'tblfurniture.TYPID='.mysql_real_escape_string($_POST['type']);

    $where = '';
     if (count($whereClauses) > 0) {
$where = 'WHERE '.implode(' AND ',$whereClauses);


}
$results = $mysqli->query("SELECT * FROM tblfurniture JOIN      tblcollection ON tblfurniture.COLID = tblcollection.COLID ".$where);

}

     else {
 $conn = mysqli_connect('localhost', 'root', '', 'hezefurniture');
     // Check connection
   if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
    }
  $results = $mysqli->query("SELECT * FROM tblfurniture 


JOIN tblcollection ON tblfurniture.COLID = tblcollection.COLID 
ORDER BY  tblfurniture.product_id");

}
     while($row = $results->fetch_object())
        {`

Answer 1

您的查询返回空值。您似乎正在搜索文本框上执行错误查询，使用mysqli_error()显示错误。

Answer 2

解决：

在

 if (! empty($_POST['search'])) $whereClauses[] = 'tblfurniture.product_name ='.'%'.mysql_real_escape_string($_POST['search']).'%';

应该是

 if (! empty($_POST['search'])) $whereClauses[] = "tblfurniture.product_name ='%".mysql_real_escape_string($_POST['search'])."%'";

mysqli查询中的数字返回数据但字符串不返回数据

2 个答案: