“file_exists”中的特殊字符问题（php） [英] special characters in "file_exists" problem (php)

问题描述

我使用特殊字符（瑞典字母åäö）。

I use special characters (swedish letters åäö).

现在，我有一些文件夹，其中包含分类广告的图片。
文件夹按类别命名。

Now, I have some folders, which contains images for classifieds. The folders are named by category.

for ($i=1; $i<=5; $i++){
    if (file_exists($big_images.$i.'.jpg')){ echo "Inne";
        unlink($big_images.$i.'.jpg');
    }
    if (file_exists($thumb_images.$i.'.jpg')){
        unlink($thumb_images.$i.'.jpg');
        }
    }

我最多允许在我的网站上显示5张图片以nr 1-5结尾。
然而，我的问题是这样的，每当folder-name有一个特殊字符，file_exists返回false，即它找不到该文件。

I allow up to 5 images on my site, each ending with a nr 1-5. However, my problem is this, whenever the folder-name has a special character, the file_exists returns false, ie it doesn't find the file. Even though it is there.

所有文件都是utf-8格式。

All documents are in utf-8 format.

如果您需要更多输入，请告诉我

If you need more input let me know

推荐答案

什么是服务器操作系统？

What's the server OS?

如果是Windows，您将无法访问UTF- filename，因为PHP使用的C IO库的Windows实现只会在系统默认代码页中。对于西欧的安装，这是代码页1252.您可以使用iconv将UTF-8字符串转换为cp1252：

If it's Windows, you'll not be able to access files under a UTF-8-encoded filename, because the Windows implementation of the C IO libraries used by PHP will only talk in the system default code page. For Western European installs, that's code page 1252. You can convert a UTF-8 string to cp1252 using iconv:

$winfilename= iconv('utf-8', 'cp1252', $utffilename);

（ utf8_decode 它会给出错误的结果，Windows的扩展字符映射到cp1252中的范围0x80-0x9F。）

(utf8_decode could also be used, but it would give the wrong results for Windows's extension characters that map to the range 0x80-0x9F in cp1252.)

文件的名称包含系统代码页例如希腊语在西方盒子上）不能被PHP和其他使用stdio的程序访问。有脚本语言可以通过Win32 API使用native-Unicode文件名，但PHP5不是其中之一。

Files whose names include characters outside the repertoire of the system codepage (eg. Greek on a Western box) cannot be accessed at all by PHP and other programs using the stdio. There are scripting languages that can use native-Unicode filenames through Win32 APIs, but PHP5 isn't one of them.

当然，不应该使用上面的步骤当部署在不同的操作系统，文件系统是UTF-8编码。 （即现代Linux。）

And of course the step above shouldn't be used when deployed on a different OS where the filesystem is UTF-8-encoded. (ie. modern Linux.)

如果您需要与PHP无缝兼容的服务器兼容，您必须避免在文件名中使用非ASCII字符。很抱歉。

If you need to seamlessly cross-server-compatible with PHP, you'll have to refrain from using non-ASCII characters in filenames. Sorry.

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