digit in mysqli query returns data but a string does not -

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so did multi filter search in mysqli can search using textbox, collection id or type id.

the problem when using search textbox, returns 

call member function fetch_object() on boolean

but returns error when type in string or single letter. when type in digit such 1 or 2, works fine , brings correct result. 

 `      $whereclauses = array();    if (! empty($_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) { $where = 'where '.implode(' , ',$whereclauses); 
  
} $results = $mysqli->query("select * tblfurniture join      tblcollection on tblfurniture.colid = tblcollection.colid ".$where);
  
}
  
     else {  $conn = mysqli_connect('localhost', 'root', '', 'hezefurniture');      // check connection    if (!$conn) { die("connection failed: " . mysqli_connect_error());     }   $results = $mysqli->query("select * tblfurniture  
  
join tblcollection on tblfurniture.colid = tblcollection.colid  order  tblfurniture.product_id");
  
}      while($row = $results->fetch_object())         {`

your query returning null value. seem executing wrong query on search textbox , use mysqli_error() show error .


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