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# XLIII. FriBiDi Functions

# Introduction

FriBiDi is a free implementation of the Unicode Bidirectional Algorithm.

# Requirements

You must download and install the FriBiDi package.

# Installation

This PECL extension is not bundled with PHP. Information for installing this PECL extension may be found in the manual chapter titled Installation of PECL extensions. Additional information such as new releases, downloads, source files, maintainer information, and a CHANGELOG, can be located here: http://pecl.php.net/package/fribidi.

In order to use these functions you must compile PHP with Fribidi support by using the --with-fribidi[=DIR] configure option.

Windows users will enable `php_fribidi.dll` inside of `php.ini` in order to use these functions. You may download this PECL extension DLL from the PHP Downloads page or at http://snaps.php.net/.

# Runtime Configuration

# Resource Types

# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

`FRIBIDI_CHARSET_UTF8` (integer)

`FRIBIDI_CHARSET_8859_6` (integer)

`FRIBIDI_CHARSET_8859_8` (integer)

`FRIBIDI_CHARSET_CP1255` (integer)

`FRIBIDI_CHARSET_CP1256` (integer)

`FRIBIDI_CHARSET_ISIRI_3342` (integer)

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