LXXXVIII. Mimetype Functions

简介

警告

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.

需求

要编译本扩展模块无需外部库文件。

安装

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.

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

注意: 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.
例 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

运行时配置

这些函数的行为受 php.ini 的影响。

表 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.

有关 PHP_INI_* 常量进一步的细节与定义参见附录 H。

以下是配置选项的简要解释。

mime_magic.debug bool: Enable/disable debugging.
mime_magic.magicfile string: The path to the magic.mime file.

资源类型

本扩展模块未定义任何资源类型。

预定义常量

本扩展模块未定义任何常量。

目录
mime_content_type -- Detect MIME Content-type for a file (deprecated)

add a note User Contributed Notes

benjamin dot povirk at gmail dot com
06-Aug-2007 09:55


I know about PECL, still:



for getting mime type from magic.mime this was my addon



# FLV

0       string          FLV             video/x-flv



for Adobe's FLV video.

Bjorn dot Wiberg at its dot uu dot se
08-Mar-2005 08:32


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 02:28


The correct link to the mime-types list is:



http://www.iana.org/assignments/media-types/

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