php上传图片存入数据库示例分享
大部分人的图片上传都是保存一个路径到数据库,这样在插入时确实快,也符合web的特点,但是在删除时就很麻烦,需要找到文件并删除,该代码能够把代码直接存入数据库,删除时一并删除。请注意:这样的话数据库大小会激增,请酌情使用
表结构代码如下:
- CREATE TABLE `upload` (
- `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
- `type` varchar(20) NOT NULL,
- `data` mediumblob NOT NULL,
- PRIMARY KEY (`id`)
- ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
index.html 代码如下:
- <!doctype html>
- <html>
- <head>
- <title>
- Post-Image
- </title>
- </head>
- <body>
- <form action="post.php" method="post" enctype="multipart/form-data">
- <input type="file" name="file" />
- <input type="submit" value="OK"/>
- </form>
- </body>
- </html>
post.php 代码如下:
- <?php
- if ($_FILES["file"]["error"] > 0)
- {
- echo "Error: " . $_FILES["file"]["error"] . "<br />";
- }
- else
- {
- $type = $_FILES["file"]["type"];
- $size = $_FILES['file']['size'];
- $tmp=$_FILES["file"]["tmp_name"];
- $fp = fopen($tmp,'rb');
- $data = bin2hex(fread($fp,$size));
- $dsn='mysql:host=localhost;dbname=test';
- echo '<pre>';
- try{
- $pdo = new PDO($dsn,'root','root');
- $pdo->exec("INSERT INTO `upload`(`type`,`data`) values ('$type',0x$data)");
- $id = $pdo->lastInsertId();
- echo 'upload success!<a href="view.php?">View</a>';
- $pdo = null;
- }catch (PDOException $e){
- echo $e->getMessage();
- }
- echo '</pre>';
- fclose($fp);
- }
view.php 代码如下:
- <?php
- $id = $_GET['id'];
- if(is_numeric($id)){
- $dsn='mysql:host=localhost;dbname=test';
- try{
- $pdo = new PDO($dsn,'root','root');
- $rs = $pdo->query('select * from `upload` where `id`='.$id);
- $row = $rs->fetchAll();
- $data = $row[0];
- header("Content-Type:${data['type']}");
- echo $data['data'];
- $pdo = null;
- }catch (PDOException $e){
- echo $e->getMessage();
- }
- }else{
- exit();
- }