Why can't I use the prepared mysqli statement in php to query database data (bind parameters or bind results)? the project is in urgent need! What should I do?

Why can't I use the prepared mysqli statement in php to query database data (bind parameters or bind results)? the project is in urgent need! The code is as follows: PHPcode & lt ;? Php * bind the result using mysqli extension * Create a server connection $ mysqlinewmysqli (localhost, root, root, searcdb ); why can't I use the prepared mysqli statement in php to query database data (bind parameters or bind results)? the project is in urgent need!
The code is as follows:

PHP code

  
  Stmt_init (); // prepare the statement for execution $ stmt-> prepare ($ query); // execute the statement $ stmt-> execute (); // bind_result ($ name, $ pwd); // cyclically process the result and output the data while ($ stmt-> fetch ()) {printf ("% s, % s, % s
", $ Name, $ pwd);} // restore statement resource $ stmt-> close (); // close the connection $ mysqli-> close ();?>

What is the problem with this statement? I can directly add, delete, modify, and query the statement, but neither use the mysqli binding result nor the method for binding parameters. could you please help me, the company's internship will soon be used as a project, and it will be urgently used !!

------ Solution --------------------
Printf ("% s, % s, % s
", $ Name, $ pwd );???

A parameter is missing.
Or an extra formatted character.
------ Solution --------------------
Add one more placeholder. Don't you only have two parameters?
------ Solution --------------------
If one line of code is missing, you must temporarily store the query results for use.
For reference only:

PHP code

Function selectLink ($ oid) {$ SQL = "select o. oid, l. lid, c. cid, comName, comPrice, ordTime from mis_order o, mis_link l, mis_commodity c where o. oid = l. lid and c. cid = l. cid and o. oid =? "; $ Stmt = $ this-> mysqli-> prepare ($ SQL); $ stmt-> bind_param (" I ", $ oid); $ stmt-> execute (); $ stmt-> store_result (); $ stmt-> bind_result ($ oid, $ lid, $ cid, $ comName, $ comPrice, $ ordTime ); $ rows = $ stmt-> affected_rows; if ($ rows> 0) {$ arrLink = array (); while ($ stmt-> fetch ()) {$ arr = array ("oid" => $ oid, "lid" => $ lid, "cid" => $ cid, "comName" => $ comName, "comPrice" => $ comPrice, "ordTime" => $ ordTime); array _ Push ($ arrLink, $ arr);} return $ arrLink;} else {echo "an error occurred while querying order details!
";}}