我正在尝试使用 PDO 将图像上传到 SQL Server,其代码与我在 MySQL 中执行的代码相同,但没有成功。
我认为它会像 MySQL 一样简单,但微软确保我会受苦。
我收到的错误是:SQLSTATE [IMSSP]:将输入参数 3 的字符串转换为 UCS-2 时出错:目标多字节代码页中不存在 Unicode 字符的映射。
我创建了这个可运行的小示例(2 个文件“upload.php”和“test.html”)。为了使用 MySQL,参数应该是$db = 'mysql'
名为“upload.php”的 php 文件内容:
<?php
$db = 'mssql'; // $db = 'mysql';
$config = array(
'mysql' => array(
'dsn' => 'mysql:host=localhost;dbname=',
'user' => 'root',
'password' => ''
),
'mssql' => array(
'dsn' => 'sqlsrv:Server=localhost;Database=',
'user' => '',
'password' => ''
)
);
try {
// connect to database
$pdoTest = new PDO($config[$db]['dsn'].'test', $config[$db]['user'], $config[$db]['password']);
$pdoTest->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// insert image to table (with additional some info)
$queryIn = $pdoTest->prepare("
INSERT INTO tbl_image (username, type, image)
VALUES (:username, :type, :image);
");
$queryIn->bindValue(':username', $_POST['username']);
$queryIn->bindValue(':type', $_FILES['image']['type']);
$queryIn->bindValue(':image', file_get_contents($_FILES['image']['tmp_name']));
$queryIn->execute();
// retrieve image and type from table
$queryOut = $pdoTest->prepare("
SELECT type, image
FROM tbl_image
WHERE username = :username
");
$queryOut->bindValue(':username', $_POST['username']);
$queryOut->execute();
$row = $queryOut->fetch(PDO::FETCH_ASSOC);
if ($row) {
// send image back to browser
header('content-type: '.$row['type']);
echo $row['image'];
}
}
catch (PDOException $e) {
echo $e->getMessage();
}
名为“test.html”的 html 文件内容:
<!DOCTYPE html>
<html class="no-overflow">
<head>
<meta charset="UTF-8">
<title>Load image to SQL Server 2012</title>
</head>
<body>
<form enctype="multipart/form-data" action="upload.php" method="POST">
<input type="text" name="username" autofocus="">
<input type="file" name="image" accept="image/jpeg">
<input type="submit" name="submit">
</form>
</body>
</html>
MySQL定义:
database name 'test'
table name 'tbl_image'
field #1 'username varchar(255)'
field #2 'type varchar(255)'
field #3 'image blob'
SQL Server 2012 定义:
database name 'test'
table name 'tbl_image'
field #1 'username nvarchar(255)'
field #2 'type nvarchar(255)'
field #3 'image varbinary(MAX)'
我还尝试了一些较旧的 SQL Server 示例,但均未成功:
$datastring = file_get_contents($_FILES['image']['tmp_name']);
$data = unpack("H*hex", $datastring);
$image = '0x'.$data;
任何的想法?