File uploaded by php is garbled

In the actual development process, we often encounter the problem of garbled characters when uploading files in PHP. This problem may be caused by a problem with the encoding format or file type. The solutions will be explained one by one below.

1. Encoding format problem

The default encoding format used in php is ISO-8859-1, and the encoding format used when uploading files may be inconsistent with this, resulting in Garbled characters appear. To solve this problem, we can use the mb_convert_encoding() function to convert the encoding format of the uploaded file to the ISO-8859-1 encoding format.

Code Example:

$file = $_FILES['file']['tmp_name'];
$content = file_get_contents($file);
$content = mb_convert_encoding($content, "ISO-8859-1", "auto");

2. File Type Issues

There may also be issues with file types when processing uploaded files, such as non-text file file types There will be garbled characters in the parsing. At this time, we can solve the problem by detecting the file type. PHP provides the finfo function, which can detect the MIME type of uploaded files to solve file type problems.

Code example:

$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime = finfo_file($finfo, $_FILES['file']['tmp_name']);
if ($mime == "image/png") {
    // 处理png类型的文件
} elseif ($mime == "image/jpeg") {
    // 处理jpeg类型的文件
} else {
    // 其他类型文件
}
finfo_close($finfo);

3. Summary of solutions

To sum up, for the problem of garbled uploaded files, we can take various measures according to different situations. Different solutions. For encoding format issues, you can use the mb_convert_encoding() function to solve them; for file type issues, you can use the finfo function provided by PHP to detect, so that different file types can be processed separately. At the same time, when uploading files, you can also configure the php.ini file to ensure that the type and size of the uploaded files meet the requirements.

The following parameters can be configured in the ini file:

upload_max_filesize=2M
post_max_size=8M

The above is a summary of methods to solve garbled files uploaded by PHP. There is no absolute success in life, but by adopting the correct solution to each problem, most problems can be solved. I hope this article can be helpful to everyone.

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