php实现上传图片保存到数据库的方法_php技巧

CREATE TABLE `photo` ( 
  `id` int(10) unsigned NOT NULL auto_increment, 
  `type` varchar(100) NOT NULL, 
  `binarydata` mediumblob NOT NULL, 
  PRIMARY KEY  (`id`) 
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;

// 连接数据库 
$conn=@mysql_connect("localhost","root","")  or die(mysql_error()); 
@mysql_select_db('demo',$conn) or die(mysql_error()); 

// 判断action 
$action = isset($_REQUEST['action'])? $_REQUEST['action'] : ''; 

// 上传图片 
if($action=='add'){ 
    $image = mysql_escape_string(file_get_contents($_FILES['photo']['tmp_name'])); 
    $type = $_FILES['photo']['type']; 
    $sqlstr = "insert into photo(type,binarydata) values('".$type."','".$image."')"; 
    @mysql_query($sqlstr) or die(mysql_error()); 
    header('location:upload_image_todb.php'); 
    exit(); 
// 显示图片 
}elseif($action=='show'){ 
    $id = isset($_GET['id'])? intval($_GET['id']) : 0; 
    $sqlstr = "select * from photo where id=$id"; 
    $query = mysql_query($sqlstr) or die(mysql_error()); 
    $thread = mysql_fetch_assoc($query); 
    if($thread){ 
        header('content-type:'.$thread['type']); 
        echo $thread['binarydata']; 
        exit(); 
    } 
}else{ 
// 显示图片列表及上传表单 
?> 
 
 
 

 
   
   
  
 
  
 

 
 

图片：

 
 

 
 

 
 
    $sqlstr = "select * from photo order by id desc"; 
    $query = mysql_query($sqlstr) or die(mysql_error()); 
    $result = array(); 
    while($thread=mysql_fetch_assoc($query)){ 
        $result[] = $thread; 
    } 
    foreach($result as $val){ 
        echo '

'; 
    } 
?> 
 
 
} 
?>