Question

我希望将图像直接存储在数据库中，而不将其存储在我的资源管理器上的文件夹中。如果可能的话怎么样？我使用php和mysql数据库来存储图像，我已经定义了数据类型LONGBLOB来将图像存储在数据库中。以下是我的代码：

   <?php

$conn = mysqli_connect("localhost","root","")or die(mysqli_error($conn));
mysqli_select_db($conn,'image') or die(mysqli_error($conn));

if(isset($_REQUEST['submit'])){
$old = $_FILES['img']['tmp_name'];
$new = $_FILES['img']['name'];

move_uploaded_file($old,$new);

echo $sql = "INSERT INTO img(`img_name`) VALUES('$new')";
$exe = mysqli_query($conn,$sql);
if($exe){
    echo "Image Uploaded Successfully....";

    }
}

echo $query = "Select `img_name` from `img`";
$ex = mysqli_query($conn,$query);

?>

<html>
    <body>
        <form method="post" name="myForm" id="myForm" enctype="multipart/form-data">
            <div>
                <input type="file" name="img"/>
            </div>
            <div>
                <input type="submit" name="submit" value="Upload"/>
            </div>
            <?php
                while($res = mysqli_fetch_array($ex)){

            ?>
            <div>
                <img height="50" width="50" src="<?php echo $res['img_name'];?>"/><br/>
            </div>
            <?php } ?>
        </form>
    </body>
</html>

Answer 1

您需要将图像转换为base64。像这样的东西：

$path = $_FILES['img']['tmp_name'];
$type = pathinfo($path, PATHINFO_EXTENSION);
$data = file_get_contents($path);
$base64 = 'data:image/' . $type . ';base64,' . base64_encode($data);

如果可能的话，最好将其保存为字符串而不是BLOB。如果必须是BLOB，则必须转换字符串，然后在从数据库中检索时将其转换回来。如果将其存储为字符串，则图像甚至可以使用base64作为图像的src。

Answer 2

            move_uploaded_file($_FILES['imagefile']['tmp_name'],"latest.img");
            $instr = fopen("latest.img","rb");
            $image = addslashes(fread($instr,filesize("latest.img")));

            mysql_query ("insert into pix (mgdata) values ('".image."')");

删除上传的图片后，图片将显示在DB

中

您可以将图像从数据库发送到浏览器

    $gotten = @mysql_query("select * from pix order by pid desc limit 1");
    if ($row = @mysql_fetch_assoc($gotten)) {
    $title = htmlspecialchars($row[title]);
    $bytes = $row[imgdata];
    } 

    // If this is the image request, send out the image

    if ($_REQUEST[gim] == 1) {
    header("Content-type: image/jpeg");
    print $bytes;
    exit ();
    }
    ?>

是否可以直接在数据库中存储图像？

2 个答案: