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Language Class
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<h1>Language Class</h1>
<p>The Language Class provides functions to retrieve language files and lines of text for purposes of internationalization.</p>
<p>In your Code Igniter system folder you'll find one called <dfn>language</dfn> containing sets of language files. You can create
your own language files as needed in order to display error and other messages in other languages.</p>
<h2>Creating Language Files</h2>
<p>Language files must be named with <kbd>_lang.php</kbd> as the file extension. For example, let's say you want to create a file
containing error messages. You might name it: <kbd>error_lang.php</kbd></p>
<p>Within the file you will assign each line of text to an array called <var>$lang</var> with this prototype:</p>
<code>$lang['language_key'] = "The actual message to be shown";</code>
<p><strong>Note:</strong> It's a good practice to use a common prefix for all messages in a given file to avoid collisions with
similarly named items in other files:</p>
<code>$lang['<var>error</var>_email_missing'] = "You must submit an email address";<br />
$lang['<var>error</var>_url_missing'] = "You must submit a URL";<br />
$lang['<var>error</var>_username_missing'] = "You must submit a username";</code>
<h2>Loading A Language File</h2>
<p>In order to fetch a line from a particular file you must load the file first. Loading a language file is done with the following code:</p>
<code>$this->lang->load('<samp>filename</samp>', '<dfn>language</dfn>');</code>
<p>Where <samp>filename</samp> is the name of the file you wish to load (without the file extension), and <dfn>language</dfn>
is the language set containing it (ie, english). If the second parameter is missing, the default language set in your
<kbd>application/config/config.php</kbd> file will be used.</p>
<h2>Fetching a Line of Text</h2>
<p>Once your desired language file is loaded you can access any line of text using this function:</p>
<code>$this->lang->line('<samp>language_key</samp>');</code>
<p>Where <samp>language_key</samp> is the array key corresponding to the line you wish to show.</p>
<p>Note: This function simply returns the line. It does not echo it for you.</p>
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