有什么问题请与我联系:http://www.ninedns.com web@ninedns.com 转载请注明出处 今天教给大家如何用PHP实现把图象上传到MYSQL数据库中。 在这个教程中我们需要建立3个PHP文件: readdir.php - 把图片放到数据库的代码 image.php - 显示实际图片的代码 view.php - 显示你如何调用数据库中的图片的代码 1.创建一个数据库 CREATE TABLE `images` ( `imgid` INT NOT NULL AUTO_INCREMENT , `sixfourdata` LONGTEXT NOT NULL , PRIMARY KEY ( `imgid` ) ); READDIR.PHP 具体的内容: $dbcnx = mysql_connect("localhost", "username", "password"); mysql_select_db("base64imgdb"); ?> '我们需要打开一个目录 "./" 'readdir.php 文件定位于这个目录: $path = "./"; $dir_handle = opendir($path) or die("Unable to open directory $path"); 下面是比较难的部分,大家需要好好研究一下:把图象分类,并且读出正在使用的一些数据 fopen '转换 base64_encode ' 插入到表里 while ($file = readdir($dir_handle)) { $filetyp = substr($file, -3); if ($filetyp == 'gif' OR $filetyp == 'jpg') { $handle = fopen($path . "/" . $file,'r'); $file_content = fread($handle,filesize($path . "/" . $file)); fclose($handle); $encoded = chunk_split(base64_encode($file_content)); $sql = "INSERT INTO images SET sixfourdata='$encoded'"; mysql_query($sql); } } ?> 关闭设置的目录,然后处理: closedir($dir_handle); echo("complete"); mysql_close($dbcnx); ?> 读出图片的代码:IMAGE.PHP 这段代码比较难,我们要好好看看 $dbcnx = mysql_connect("localhost", "username", "password"); mysql_select_db("base64imgdb"); ?> 我们读出图片使用的代码image.php?img=x: $img = $_REQUEST["img"]; ?> 之后我们需要连接数据库,然后读出 $result = mysql_query("SELECT * FROM images WHERE imgid=" . $img . ""); if (!$result) { echo("请求错误: " . mysql_error() . ""); exit(); } while ($row = mysql_fetch_array($result)) { $imgid = $row["imgid"]; $encodeddata = $row["sixfourdata"]; } ?> mysql_close($dbcnx); echo base64_decode($encodeddata); ?> 在这里我们要理解base64-encoded 图象数据格式。 "让我们来看看具体的图片吧!" VIEW.PHP image.php?img=1 image.php?img=357 看看完整的一个例子吧! readdir.php: ############################### # DB CONNECTION # CHANGE THESE VALUES ############################### $dbcnx = mysql_connect("localhost", "username", "password"); mysql_select_db("base64imgdb"); $path = "./"; $dir_handle = opendir($path) or die("Unable to open directory $path"); while ($file = readdir($dir_handle)) { $filetyp = substr($file, -3); if ($filetyp == 'gif' OR $filetyp == 'jpg') { $handle = fopen($file,'r'); $file_content = fread($handle,filesize($file)); fclose($handle); $encoded = chunk_split(base64_encode($file_content)); $sql = "INSERT INTO images SET sixfourdata='$encoded'"; mysql_query($sql); } } closedir($dir_handle); echo("complete"); mysql_close($dbcnx); ?> image.php: $dbcnx = mysql_connect("localhost", "username", "password"); mysql_select_db("base64imgdb"); $img = $_REQUEST["img"]; $result = mysql_query("SELECT * FROM images WHERE imgid=" . $img . ""); if (!$result) { echo("Error performing query: " . mysql_error() . ""); exit(); } while ($row = mysql_fetch_array($result) ) { $imgid = $row["imgid"]; $encodeddata = $row["sixfourdata"]; } mysql_close($dbcnx); echo base64_decode($encodeddata); ?> And view.php (i shouldnt need to post this..) .. .. |
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