The functions in this module try to guess the content type and encoding of a file by looking for certain magic byte sequences at specific positions within the file. While this is not a bullet proof approach the heuristics used do a very good job. This extension is derivated from Apache mod_mime_magic, which is itself based on the file command maintaind by Ian F. Darwin. See the source code for further historic and copyright information. これらの関数は、標準モジュールの一部と して利用可能であり、常に使用できます。 You must compile PHP with the configure switch --enable-mime-magic to get support for mime-type functions. The extension needs a copy of the magic.mime as distributed with the file command. This file also part of most recent Linux distributions and usually stored in the /usr/share/misc directory. これらの関数の動作は、 php.ini の設定により変化します。 表 1Mimetype configuration options この拡張モジュールはリソース型を全く定義し ません。 この拡張モジュールは定数を全く定義しませ ん。