在PDO中使用bindParam [英] using bindParam with PDO
本文介绍了在PDO中使用bindParam的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我花了几个小时来摸索这个代码. 对我来说没有意义,为什么它不起作用
I've been scratching my head over this code for a couple of hours.... Doesn't make sense to me why it doesn't work
$isCorrect =($question->correct_answer == $body->answer) ? 1:0;
// the values are all there.......
// echo $body->question . "\n"; //335
// echo $body->user . "\n"; //51324123
// echo $question->day . "\n"; //0
// echo $isCorrect . "\n"; //0
//but still the below part fails.
$db = getConnection();
$sql = "INSERT INTO `answers` (`id`, `question_id`, `user`, `day`, `is_correct`) VALUES (NULL, ':question', ':user', ':day', :is_correct)";
$stmt = $db->prepare($sql);
$stmt->bindParam(":question_id", $body->question);
$stmt->bindParam(":user", $body->user);
$stmt->bindParam(":day", $question->day, PDO::PARAM_INT);
$stmt->bindParam(":is_correct", $isCorrect, PDO::PARAM_INT);
$stmt->execute();
给出此错误:
SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens
我正在计数4个令牌...我想念什么?显然我做错了.
I'm counting 4 tokens... what am I missing? Obviously I'm doing something wrong.
推荐答案
更改:
$stmt->bindParam(":question_id", $body->question);
收件人:
$stmt->bindParam(":question", $body->question);
您已在查询:question
中使用过,但绑定了错误的键(:question_id
).
You have use in query :question
but binding with wrong key(:question_id
).
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