CI_Utf8
===============

Utf8 Class

Provides support for UTF-8 environments


* Class name: CI_Utf8
* Namespace: 


Methods
-------


### __construct

    void CI_Utf8::__construct()

Class constructor

Determines if UTF-8 support is to be enabled.

* Visibility: **public**


### clean_string

    string CI_Utf8::clean_string(string $str)

Clean UTF-8 strings

Ensures strings contain only valid UTF-8 characters.

* Visibility: **public**


#### Arguments
* $str **string** - &lt;p&gt;String to clean&lt;/p&gt;


### safe_ascii_for_xml

    string CI_Utf8::safe_ascii_for_xml(string $str)

Remove ASCII control characters

Removes all ASCII control characters except horizontal tabs,
line feeds, and carriage returns, as all others can cause
problems in XML.

* Visibility: **public**


#### Arguments
* $str **string** - &lt;p&gt;String to clean&lt;/p&gt;


### convert_to_utf8

    string CI_Utf8::convert_to_utf8(string $str, string $encoding)

Convert to UTF-8

Attempts to convert a string to UTF-8.

* Visibility: **public**


#### Arguments
* $str **string** - &lt;p&gt;Input string&lt;/p&gt;
* $encoding **string** - &lt;p&gt;Input encoding&lt;/p&gt;


### is_ascii

    boolean CI_Utf8::is_ascii(string $str)

Is ASCII?

Tests if a string is standard 7-bit ASCII or not.

* Visibility: **public**


#### Arguments
* $str **string** - &lt;p&gt;String to check&lt;/p&gt;