Question

以下应该做的是抓取我们想要从HTML表单创建的表的标题，现在我硬编码了它的值...但即使有硬编码值我也得到了以下错误。连接到数据库致命错误：在非对象中调用成员函数execute（）第44行的'filepath'.php

    <?php

            // Configuration
            $hostname = 'host';
            $username = 'user';
            $password = 'pass';
            $database = 'dbname';

            $table = $_Post['table'];
        try {
            $conn = new PDO('mysql:host='. $hostname .';dbname='. $database, $username, $password);
    echo "Connected to database"; // check for connection
    echo $table;
    // We get the connected to database message....
$conn->exec("SET CHARACTER SET utf8");      // Sets encoding UTF-8
 // table A is going to be a var , but for now testing with a hardcoded value 
  $sql = "CREATE TABLE tableA (
  id int(8) ,
  Question varchar(170),
  AnswerA varchar(100),
  AnswerB varchar(100),
  AnswerC varchar(100),
  AnswerD varchar(100),
  A int(8),
  B int (8), 
  C int (8) , 
  D int (8)
  ) CHARACTER SET utf8 COLLATE utf8_general_ci";

  $sqlb = "INSERT INTO `DBNAME` tableA (`id`, `Question`, `AnswerA`, `AnswerB`, `AnswerC`, `AnswerD`, `A`, `B`, `C`, `D`) 
  VALUES ('1', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL), 
  ('2', NULL,  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL), 
  ('3', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL),
  ('4', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL),
  ('5', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL), 
  ('6', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL), 
  ('7', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL),
  ('8', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL), 
  ('9', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL),
  ('10', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL)";
  // lets not do it all at once eh , run a secound script to add in all the values 



 $sql->execute(); 
 $sqlb->execute(); 
 // if($conn->exec($sql) !== false) echo 'The sites table is created';  
//if($conn->exec($sqlb) !== false) echo 'We inserted some values !';  


}
catch(PDOException $e)
    {
    echo $e->getMessage();
    }
//  }
// write code to check if we succeded in creating a table with with $, if so display an alert of of some kind
// with Javascript ....

// disabled the redirect so i could see the error message
//header ("Location: quizsubmit.html");
/* Make sure that code below does not get executed when we redirect. */
exit ;



?>

Answer 1

$sql和$sqlb变量包含字符串，而不是PHP对象。他们没有execute()方法。

您需要先准备查询，然后才能执行生成的语句对象：

$stmt = $conn->prepare($sql);
$stmtb = $conn->prepare($sqlb);

$stmt->execute();
$stmtb->execute();

Answer 2

你在字符串上调用->execute()，它应该如何工作？您需要使用prepare()方法来创建语句对象。

Answer 3

如上所述，您可以调用返回PDOStatement的prepare，然后调用execute或只调用exec来获取PDO对象。 1）

$stmt = $conn->prepare($sql);
$stmtb = $conn->prepare($sqlb);

$stmt->execute();
$stmtb->execute();

2）

$pdoObj = new PDO('mysql:host='. $hostname .';dbname='. $database, $username, $password);
$pdoObj->exec($sql);

Answer 4

我有同样的错误......

我选择的是一张不存在的桌子。我的错误。

在非对象PHP / SQL上调用成员函数execute（）

4 个答案: