PHP file download principle, _PHP tutorial

PHP file download principle,

1. PHP download schematic diagram

2. File download source code:

3. Solution to file encoding problem:

If the file name is Chinese, the php function cannot recognize the Chinese file name. Generally, if the program encoding is utf-8, the php function is relatively old and can only recognize gb2312 encoded Chinese, so use iconv("original encoding" for Chinese ", "Encoding to be converted to", "String to be transcoded") function can be transcoded.

For example, convert a string from utf-8 to gb2312

　$file_name=iconv(“utf-8”,”gb2312”,”$file_name”);