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我在下面有一些 php 代码将数据添加到 2 个表中，一个称为“Image Table”，另一个称为“Image_Question”表。我面临的问题是当它插入“图像”表时，它不会将任何数据插入“图像问题”表中。

现在我知道 PHP 代码很好，因为它曾经能够毫无问题地将数据插入到两个表中。

只有在我向表中添加索引和外键之后，这个问题才开始发生。

下面是将数据插入两个表的 PHP 代码：

move_uploaded_file($_FILES["fileImage"]["tmp_name"],"ImageFiles/" . $_FILES["fileImage"]["name"]);

$imagesql = "INSERT INTO Image (ImageFile) VALUES (?)";

if (!$insert = $mysqli->prepare($imagesql)) {
      // Handle errors with prepare operation here
}

//Don't pass data directly to bind_param store it in a variable
$insert->bind_param("s",$img);

//Assign the variable
$img = 'ImageFiles/'.$_FILES['fileImage']['name'];

$insert->execute();

if ($insert->errno) {
   // Handle query error here
}

$insert->close();

$lastID = $mysqli->insert_id;         

$imagequestionsql = "INSERT INTO Image_Question (ImageId, SessionId, QuestionId)  VALUES (?, ?, ?)"; 

if (!$insertimagequestion = $mysqli->prepare($imagequestionsql)) { 
   // Handle errors with prepare operation here 
   echo "Prepare statement err imagequestion"; 
} 

$qnum = (int)$_POST['numimage'];

$insertimagequestion->bind_param("isi",$lastID, $sessid, $qnum); 

$sessid =  $_SESSION['id'] . ($_SESSION['initial_count'] > 1 ? $_SESSION['sessionCount'] : ''); 

    $insertimagequestion->execute(); 

                if ($insertimagequestion->errno) { 
          // Handle query error here 
        } 

        $insertimagequestion->close();

这是SHOW CREATE TABLEImage Table、Image_Question Table 和 Question Table 的输出，因为 Image_Question Table 与该表相关：

图像表：

CREATE TABLE `Image` (
 `ImageId` int(10) NOT NULL AUTO_INCREMENT,
 `ImageFile` varchar(250) NOT NULL,
 PRIMARY KEY (`ImageId`)
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8

Image_Question 表：

CREATE TABLE `Image_Question` (
 `ImageQuestionId` int(10) NOT NULL AUTO_INCREMENT,
 `ImageId` int(10) NOT NULL,
 `SessionId` varchar(10) NOT NULL,
 `QuestionId` int(5) NOT NULL,
 PRIMARY KEY (`ImageQuestionId`),
 KEY `FK_QuestionImage` (`ImageId`),
 KEY `questionId` (`QuestionId`),
 KEY `sessionId` (`SessionId`),
 CONSTRAINT `FK_Image_Question` FOREIGN KEY (`SessionId`) REFERENCES `Question` (`SessionId`) ON DELETE CASCADE,
 CONSTRAINT `FK_question` FOREIGN KEY (`QuestionId`) REFERENCES `Question` (`QuestionId`) ON DELETE CASCADE,
 CONSTRAINT `FK_QuestionImage` FOREIGN KEY (`ImageId`) REFERENCES `Image` (`ImageId`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8

问题表：

CREATE TABLE `Question` (
 `SessionId` varchar(10) NOT NULL DEFAULT '',
 `QuestionId` int(5) NOT NULL,
 `QuestionContent` varchar(5000) NOT NULL,
 `NoofAnswers` int(2) NOT NULL,
 `AnswerId` int(10) NOT NULL AUTO_INCREMENT,
 `ReplyId` varchar(2) NOT NULL,
 `QuestionMarks` int(4) NOT NULL,
 `OptionId` varchar(3) NOT NULL,
 PRIMARY KEY (`SessionId`,`QuestionId`),
 KEY `FK_Option_Table` (`OptionId`),
 KEY `FK_IndividualQuestion` (`QuestionId`),
 KEY `FK_Reply` (`ReplyId`),
 KEY `FK_AnswerId` (`AnswerId`)
) ENGINE=InnoDB AUTO_INCREMENT=76 DEFAULT CHARSET=utf8
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1 回答 1

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$img = 'ImageFiles/'.$_FILES['fileImage']['name'];

$insert->bind_param("s",$img);

用这个代替 

$insert->bind_param("s",$img);

//Assign the variable
$img = 'ImageFiles/'.$_FILES['fileImage']['name'];
于 2012-09-30T10:05:20.440 回答