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PHP Manual

## Runtime Configuration

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

Iconv Configure Options
Name | Default | Changeable | Changelog
--- | --- | --- | ---
iconv.input_encoding | "ISO-8859-1" | PHP_INI_ALL | Available since PHP 4.0.5.
iconv.output_encoding | "ISO-8859-1" | PHP_INI_ALL | Available since PHP 4.0.5.
iconv.internal_encoding | "ISO-8859-1" | PHP_INI_ALL | Available since PHP 4.0.5.

Here's a short explanation of the configuration directives.

Warning

Some systems (like IBM AIX) use "ISO8859-1" instead of "ISO-8859-1" so this value has to be used in configuration options and function parameters.

`iconv.input_encoding` string

  Currently this option is not used.

`iconv.output_encoding` string

`iconv.internal_encoding` string

Installation
Resource Types
Installing/Configuring
PHP Manual