PHP: Mimetype Functions - Manual

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Last updated: Fri, 26 Jan 2007

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# LXXXV. Mimetype Functions

# Введение

Внимание
This extension has been deprecated as the PECL extension Fileinfo provides the same functionality (and more) in a much cleaner way.

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 derived from Apache mod_mime_magic, which is itself based on the `file` command maintained by Ian F. Darwin. See the source code for further historic and copyright information.

# Требования

Эти функции всегда доступны.

# Установка

You must compile PHP with the configure switch `--with-mime-magic` to get support for mime-type functions. The extension needs a copy of the simplified `magic` file that is distributed with the Apache httpd.

> Замечание: The configure option has been changed from `--enable-mime-magic` to `--with-mime-magic` since PHP 4.3.2

> Замечание: This extension is not capable of handling the fully decorated `magic` file that generally comes with standard Linux distro's and is supposed to be used with recent versions of `file` command.

> Note to Win32 Users: In order to use this module on a Windows environment, you must set the path to the bundled `magic.mime` file in your `php.ini`.

> Пример 1. Setting the path to `magic.mime`

>     mime_magic.magicfile = "$PHP_INSTALL_DIR\magic.mime"

> Remember to substitute the `$PHP_INSTALL_DIR` for your actual path to PHP in the above example. e.g. `c:\php`

# Настройка во время выполнения

Поведение этих функций зависит от установок в `php.ini`.

Таблица 1. Mimetype configuration options

Name | Default | Changeable | Changelog
--- | --- | --- | ---
mime_magic.debug | "0" | PHP_INI_SYSTEM | Available since PHP 5.0.0.
mime_magic.magicfile | "/path/to/php/magic.mime" | PHP_INI_SYSTEM | Available since PHP 4.3.0.

Для подробного описания констант PHP_INI_*, обратитесь к документации функции ini_set().

Краткое разъяснение конфигурационных директив.

`mime_magic.debug` bool

  Enable/disable debugging.

`mime_magic.magicfile` string

  The path to the magic.mime file.

# Типы ресурсов

Данное расширение не определяет никакие типы ресурсов.

# Предопределенные константы

Данное расширение не определяет никакие константы.

add a note User Contributed Notes
Mimetype Functions
Bjorn dot Wiberg at its dot uu dot se
08-Mar-2005 12:32
`For those experiencing problems with "invalid magic file, disabled" in phpinfo() although everything seems to be set up correctly:
It seems that the real error behind this is that the PHP mime_magic
extension does NOT obey "php_admin_value mime_magic.magicfile" or
"php_value mime_magic.magicfile" directives in httpd.conf, although the
documentation states that mime_magic.magicfile should be settable from
PHP_INI_SYSTEM, i.e., from php.ini and httpd.conf.
Adding the following to php.ini correctly configures mime_magic (using
an Apache 2-supplied magic file):
[mime_magic]
mime_magic.magicfile = "/etc/apache/magic"
Furthermore, phpinfo() will SHOW any httpd.conf setting of
mime_magic.magicfile that you make, but still not actually USE anything
but what you specified in php.ini!
Hopefully this can help someone. As the mime_magic extension is deprecated, it is not supported anymore, so I guess we can't expect any fixes to this. Even though many scripts still use the mime_magic functionality.`
mad4linux
23-Feb-2005 06:28
`The correct link to the mime-types list is:
http://www.iana.org/assignments/media-types/`
add a note
mime_content_type mhash

Last updated: Fri, 26 Jan 2007
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