   #PHP Manual Function Reference mhash mime_content_type

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LVII. Mimetype Functions

Introduction

   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.

Requirements

   No external libraries are needed to build this extension.

Installation

   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.

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

     Note: 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.

   Example 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

Runtime Configuration

   The behaviour of these functions is affected by settings in php.ini.

   Table 1. Mimetype configuration options
   Name                 Default                      Changeable
   mime_magic.magicfile "/usr/share/misc/magic.mime" PHP_INI_SYSTEM
   For further details and definition of the PHP_INI_* constants see
   ini_set().

Resource Types

   This extension has no resource types defined.

Predefined Constants

   This extension has no constants defined.

   Table of Contents
   mime_content_type -- Detect MIME Content-type for a file
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