向/从MySQL数据库插入/查看图像 [英] Insert/view image into/from a MySQL DB

问题描述

我在DB中插入图像时遇到问题. 该表具有以下结构:

I have a problem with inserting images in DB. The table has the following structure:

• id-> INT(3)->自动递增
• 名称-> VARCHAR(30)
• 扩展名-> VARCHAR(10)[可能太短了]
• img-> MEDIUMBLOB

插入图像的PHP代码为:

The PHP code that insert the image is:

if($_FILES['file']['error']==0){
        $result = is_uploaded_file($_FILES['file']['tmp_name']);
        if(!$result){
            echo "Upload failed";
        }else{
            $type = explode("/", $_FILES['file']['type']);
            $extension = $type[1];

            $name = $_FILES['file']['name'];
            $img = $_FILES['file']['tmp_name'];
            $img = file_get_contents($_FILES['file']['tmp_name']);
            $img = addslashes ($img);
        }

        $sql = "INSERT INTO images (name, extension, img) VALUES ('$name', '$extension', '$img')";
        $result = $mysqli->query($sql);
        if($result){
            echo "insertion was successful";
        }else{
            echo "insertion failed: ".$mysqli->error;
        }

这就是我尝试查看img的方法:

And this is how i try to see img:

$sql = "SELECT name, extension, img FROM images WHERE id='1'";
$result = $mysqli->query($sql);
if($result){
    $a = $result->fetch_assoc();
    header ("Content-type: image/".$a['estensione']);
    echo $a['img'];

}else{
    echo "AAAAAAAAA<hr>";
    echo $mysqli->error;
}

插入没问题，但是我无法查看图像. 另外，还有另一种在Db中上传图片的方法吗?

The insertion is Ok, but i can't view the image. In addition, there's another way to upload image in Db?

推荐答案

第一个图像标签示例(您要显示结果的页面)

First in image tag example (the page where you want to display your results)

在标记中，从fetch_image_frm_db.php页面获取图像，并显示

in the tag get the image from fetch_image_frm_db.php page, and display

<img src="fetch_image_frm_db.php?id=<?php echo $id_of_row;?>"/> 

fetch_image_frm_db.php页面

fetch_image_frm_db.php page

$id=$_GET['id'];

$query = "SELECT * FROM images WHERE id=$id";

$result=mysql_query($query) or die('Error, query failed'.mysql_error()); 
$row=mysql_fetch_array($result);

header("Content-type:image/jpeg");
stripslashes ($row['img']);

echo $row['img']; 

* * 在db中存储图像不是一个好习惯

** storing images in db is not good practise

这篇关于向/从MySQL数据库插入/查看图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！