## Runtime Configuration

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

Mailparse Configure Options
Name | Default | Changeable | Changelog
--- | --- | --- | ---
mailparse.def_charset | "us-ascii" | `INI_SYSTEM` |

For further details and definitions of the INI_* modes, see the Where a configuration setting may be set.

Here's a short explanation of the configuration directives.

`mailparse.def_charset` string
  The default character set.

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