我有一个PHP函数,用于将图像向上移动到服务器,
但是我很困惑,我想为当前上传的文件提供一个唯一的md5名称。这是我的代码:
if ((getimagesize($_FILES['user_image']['tmp_name']) >0) && $_FILES['user_image']['size'] > 0 && ($_FILES['user_image']['size'] < 1048576)){
$uploaddir = DIR.'/images/';
$uploadfile = $uploaddir . basename($_FILES['user_image']['name']);
move_uploaded_file($_FILES['user_image']['tmp_name'], $uploadfile);
// check if user have already uploaded an image, then delete
//it before uploading new one
$old_file = db_user_image($user, 'image');
if (strlen($old_file)){
$delete = $uploaddir.$old_file;
if (file_exists($delete))
unlink ($delete);
}
db_save_user_image($user, 'image', $_FILES['user_image']['name']) ;
}
请告诉我如何为该文件提供唯一的 md5 名称。
按如下方式更改$uploadfile
声明:
$ext = pathinfo( $_FILES['user_image']['name'], PATHINFO_EXTENSION);
$uploadfile = $uploaddir . md5(basename($_FILES['user_image']['name']) ).$ext;
如果您只想为文件提供 md5 名称,则需要更改行
$uploadfile = $uploaddir . basename($_FILES['user_image']['name']);
自
$uploadfile = $uploaddir . md5(basename($_FILES['user_image']['name']));
和
db_save_user_image($user, 'image', $_FILES['user_image']['name']) ;
自
db_save_user_image($user, 'image', md5(basename($_FILES['user_image']['name'])));
只需在md5
上替换basename
即可。
basename
返回路径的尾随名称部分
我添加了时间戳并使用md5()
对其进行加密。 它应该为文件生成一个唯一的名称。
$targetFile = md5(time()).$_FILES['user_image']['name'];
并使用$targetFile
代替脚本中的$_FILES['user_image']['name']
。
//Code
if ((getimagesize($_FILES['user_image']['tmp_name']) >0) && $_FILES['user_image']['size'] > 0 && ($_FILES['user_image']['size'] < 1048576)){
$uploaddir = DIR.'/images/';
$targetFile = md5(time()).$_FILES['user_image']['name'];
$uploadfile = $uploaddir.$targetFile;
move_uploaded_file($_FILES['user_image']['tmp_name'], $uploadfile);
// check if user have already uploaded an image, then delete
//it before uploading new one
$old_file = db_user_image($user, 'image');
if (strlen($old_file)){
$delete = $uploaddir.$old_file;
if (file_exists($delete))
unlink ($delete);
}
db_save_user_image($user, 'image', $targetFile) ;
}