LVII. Mimetype Functions

Introduzione

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.

Requisiti

Queste funzioni sono disponibili nei moduli standard, che sono sempre disponibili.

Installazione

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.

Configurazione Runtime

Il comportamento di queste funzioni è influenzato dalle impostazioni di php.ini.

Tabella 1. Mimetype configuration options

NameDefaultChangeable
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 Type

Questa estensione non definisce alcun tipo di risorsa.

Costanti Predefinite

Questa estensione non definisce alcuna costante.

Sommario
mime_content_type -- Detect MIME Content-type for a file