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<td><h1>CodeIgniter User Guide Version 2.1.3</h1></td>
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<h1>Smiley Helper</h1>
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<p>The Smiley Helper file contains functions that let you manage smileys (emoticons).</p>
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<h2>Loading this Helper</h2>
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<p>This helper is loaded using the following code:</p>
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<code>$this->load->helper('smiley');</code>
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<p>The Smiley helper has a renderer that takes plain text simileys, like <dfn>:-)</dfn> and turns
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them into a image representation, like <img src="../images/smile.gif" width="19" height="19" border="0" alt="smile!" /></p>
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<p>It also lets you display a set of smiley images that when clicked will be inserted into a form field.
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For example, if you have a blog that allows user commenting you can show the smileys next to the comment form.
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Your users can click a desired smiley and with the help of some JavaScript it will be placed into the form field.</p>
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<h2>Clickable Smileys Tutorial</h2>
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<p>Here is an example demonstrating how you might create a set of clickable smileys next to a form field. This example
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requires that you first download and install the smiley images, then create a controller and the View as described.</p>
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<p class="important"><strong>Important:</strong> Before you begin, please <a href="http://codeigniter.com/download_files/smileys.zip">download the smiley images</a> and put them in
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a publicly accessible place on your server. This helper also assumes you have the smiley replacement array located at
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<dfn>application/config/smileys.php</dfn></p>
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<h3>The Controller</h3>
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<p>In your <dfn>application/controllers/</dfn> folder, create a file called <kbd>smileys.php</kbd> and place the code below in it.</p>
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<p><strong>Important:</strong> Change the URL in the <dfn>get_clickable_smileys()</dfn> function below so that it points to
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your <dfn>smiley</dfn> folder.</p>
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<p>You'll notice that in addition to the smiley helper we are using the <a href="../libraries/table.html">Table Class</a>.</p>
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<textarea class="textarea" style="width:100%" cols="50" rows="25">
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class Smileys extends CI_Controller {
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function __construct()
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parent::__construct();
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$this->load->helper('smiley');
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$this->load->library('table');
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$image_array = get_clickable_smileys('http://example.com/images/smileys/', 'comments');
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$col_array = $this->table->make_columns($image_array, 8);
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$data['smiley_table'] = $this->table->generate($col_array);
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$this->load->view('smiley_view', $data);
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<p>In your <dfn>application/views/</dfn> folder, create a file called <kbd>smiley_view.php</kbd> and place this code in it:</p>
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<textarea class="textarea" style="width:100%" cols="50" rows="20">
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<title>Smileys</title>
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<?php echo smiley_js(); ?>
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<form name="blog">
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<textarea name="comments" id="comments" cols="40" rows="4"></textarea>
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<p>Click to insert a smiley!</p>
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<?php echo $smiley_table; ?>
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<p>When you have created the above controller and view, load it by visiting <dfn>http://www.example.com/index.php/smileys/</dfn></p>
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<h3>Field Aliases</h3>
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<p>When making changes to a view it can be inconvenient to have the field id in the controller. To work around this,
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you can give your smiley links a generic name that will be tied to a specific id in your view.</p>
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<code>$image_array = get_smiley_links("http://example.com/images/smileys/", "comment_textarea_alias");</code>
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<p>To map the alias to the field id, pass them both into the smiley_js function:</p>
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<code>$image_array = smiley_js("comment_textarea_alias", "comments");</code>
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<h1>Function Reference</h1>
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<h2>get_clickable_smileys()</h2>
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<p>Returns an array containing your smiley images wrapped in a clickable link. You must supply the URL to your smiley folder
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and a field id or field alias.</p>
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<code>$image_array = get_smiley_links("http://example.com/images/smileys/", "comment");</code>
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<p class="important">Note: Usage of this function without the second parameter, in combination with js_insert_smiley has been deprecated.</p>
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<p>Generates the JavaScript that allows the images to be clicked and inserted into a form field.
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If you supplied an alias instead of an id when generating your smiley links, you need to pass the
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alias and corresponding form id into the function.
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This function is designed to be placed into the <head> area of your web page.</p>
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<code><?php echo smiley_js(); ?></code>
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<p class="important">Note: This function replaces js_insert_smiley, which has been deprecated.</p>
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<h2>parse_smileys()</h2>
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<p>Takes a string of text as input and replaces any contained plain text smileys into the image
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equivalent. The first parameter must contain your string, the second must contain the URL to your smiley folder:</p>
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$str = 'Here are some simileys: :-) ;-)';
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$str = parse_smileys($str, "http://example.com/images/smileys/");
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