Файл: CodeIgniter-3.0.3/user_guide/helpers/smiley_helper.html
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<div class="section" id="smiley-helper">
<h1>Smiley Helper<a class="headerlink" href="#smiley-helper" title="Permalink to this headline">¶</a></h1>
<p>The Smiley Helper file contains functions that let you manage smileys
(emoticons).</p>
<div class="admonition important">
<p class="first admonition-title">Important</p>
<p class="last">The Smiley helper is DEPRECATED and should not be used.
It is currently only kept for backwards compatibility.</p>
</div>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><a class="reference internal" href="#loading-this-helper" id="id1">Loading this Helper</a></li>
<li><a class="reference internal" href="#overview" id="id2">Overview</a></li>
<li><a class="reference internal" href="#clickable-smileys-tutorial" id="id3">Clickable Smileys Tutorial</a><ul>
<li><a class="reference internal" href="#the-controller" id="id4">The Controller</a></li>
<li><a class="reference internal" href="#field-aliases" id="id5">Field Aliases</a></li>
</ul>
</li>
<li><a class="reference internal" href="#available-functions" id="id6">Available Functions</a></li>
</ul>
</div>
<div class="custom-index container"></div><div class="section" id="loading-this-helper">
<h2><a class="toc-backref" href="#id1">Loading this Helper</a><a class="headerlink" href="#loading-this-helper" title="Permalink to this headline">¶</a></h2>
<p>This helper is loaded using the following code:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'smiley'</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="overview">
<h2><a class="toc-backref" href="#id2">Overview</a><a class="headerlink" href="#overview" title="Permalink to this headline">¶</a></h2>
<p>The Smiley helper has a renderer that takes plain text smileys, like
:-) and turns them into a image representation, like <img alt="smile!" src="../_images/smile.gif" /></p>
<p>It also lets you display a set of smiley images that when clicked will
be inserted into a form field. For example, if you have a blog that
allows user commenting you can show the smileys next to the comment
form. Your users can click a desired smiley and with the help of some
JavaScript it will be placed into the form field.</p>
</div>
<div class="section" id="clickable-smileys-tutorial">
<h2><a class="toc-backref" href="#id3">Clickable Smileys Tutorial</a><a class="headerlink" href="#clickable-smileys-tutorial" title="Permalink to this headline">¶</a></h2>
<p>Here is an example demonstrating how you might create a set of clickable
smileys next to a form field. This example requires that you first
download and install the smiley images, then create a controller and the
View as described.</p>
<div class="admonition important">
<p class="first admonition-title">Important</p>
<p class="last">Before you begin, please <a class="reference external" href="https://ellislab.com/asset/ci_download_files/smileys.zip">download the smiley images</a>
and put them in a publicly accessible place on your server.
This helper also assumes you have the smiley replacement array
located at <cite>application/config/smileys.php</cite></p>
</div>
<div class="section" id="the-controller">
<h3><a class="toc-backref" href="#id4">The Controller</a><a class="headerlink" href="#the-controller" title="Permalink to this headline">¶</a></h3>
<p>In your <strong>application/controllers/</strong> directory, create a file called
Smileys.php and place the code below in it.</p>
<div class="admonition important">
<p class="first admonition-title">Important</p>
<p class="last">Change the URL in the <a class="reference internal" href="#get_clickable_smileys" title="get_clickable_smileys"><tt class="xref php php-func docutils literal"><span class="pre">get_clickable_smileys()</span></tt></a>
function below so that it points to your smiley folder.</p>
</div>
<p>You’ll notice that in addition to the smiley helper, we are also using
the <a class="reference internal" href="../libraries/table.html"><em>Table Class</em></a>:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="o"><?</span><span class="nx">php</span>
<span class="k">class</span> <span class="nc">Smileys</span> <span class="k">extends</span> <span class="nx">CI_Controller</span> <span class="p">{</span>
<span class="k">public</span> <span class="k">function</span> <span class="nf">index</span><span class="p">()</span>
<span class="p">{</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'smiley'</span><span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'table'</span><span class="p">);</span>
<span class="nv">$image_array</span> <span class="o">=</span> <span class="nx">get_clickable_smileys</span><span class="p">(</span><span class="s1">'http://example.com/images/smileys/'</span><span class="p">,</span> <span class="s1">'comments'</span><span class="p">);</span>
<span class="nv">$col_array</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">table</span><span class="o">-></span><span class="na">make_columns</span><span class="p">(</span><span class="nv">$image_array</span><span class="p">,</span> <span class="mi">8</span><span class="p">);</span>
<span class="nv">$data</span><span class="p">[</span><span class="s1">'smiley_table'</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">table</span><span class="o">-></span><span class="na">generate</span><span class="p">(</span><span class="nv">$col_array</span><span class="p">);</span>
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'smiley_view'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>
<span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
<p>In your <strong>application/views/</strong> directory, create a file called <strong>smiley_view.php</strong>
and place this code in it:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="o"><</span><span class="nx">html</span><span class="o">></span>
<span class="o"><</span><span class="nx">head</span><span class="o">></span>
<span class="o"><</span><span class="nx">title</span><span class="o">></span><span class="nx">Smileys</span><span class="o"></</span><span class="nx">title</span><span class="o">></span>
<span class="o"><?</span><span class="nx">php</span> <span class="k">echo</span> <span class="nx">smiley_js</span><span class="p">();</span> <span class="cp">?></span>
<span class="nt"></head></span>
<span class="nt"><body></span>
<span class="nt"><form</span> <span class="na">name=</span><span class="s">"blog"</span><span class="nt">></span>
<span class="nt"><textarea</span> <span class="na">name=</span><span class="s">"comments"</span> <span class="na">id=</span><span class="s">"comments"</span> <span class="na">cols=</span><span class="s">"40"</span> <span class="na">rows=</span><span class="s">"4"</span><span class="nt">></textarea></span>
<span class="nt"></form></span>
<span class="nt"><p></span>Click to insert a smiley!<span class="nt"></p></span>
<span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$smiley_table</span><span class="p">;</span> <span class="cp">?></span> <span class="nt"></body></span> <span class="nt"></html></span>
When you have created the above controller and view, load it by visiting http://www.example.com/index.php/smileys/
<span class="nt"></body></span>
<span class="nt"></html></span>
</pre></div>
</div>
</div>
<div class="section" id="field-aliases">
<h3><a class="toc-backref" href="#id5">Field Aliases</a><a class="headerlink" href="#field-aliases" title="Permalink to this headline">¶</a></h3>
<p>When making changes to a view it can be inconvenient to have the field
id in the controller. To work around this, you can give your smiley
links a generic name that will be tied to a specific id in your view.</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$image_array</span> <span class="o">=</span> <span class="nx">get_smiley_links</span><span class="p">(</span><span class="s2">"http://example.com/images/smileys/"</span><span class="p">,</span> <span class="s2">"comment_textarea_alias"</span><span class="p">);</span>
</pre></div>
</div>
<p>To map the alias to the field id, pass them both into the
<tt class="xref py py-func docutils literal"><span class="pre">smiley_js()</span></tt> function:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$image_array</span> <span class="o">=</span> <span class="nx">smiley_js</span><span class="p">(</span><span class="s2">"comment_textarea_alias"</span><span class="p">,</span> <span class="s2">"comments"</span><span class="p">);</span>
</pre></div>
</div>
</div>
</div>
<div class="section" id="available-functions">
<h2><a class="toc-backref" href="#id6">Available Functions</a><a class="headerlink" href="#available-functions" title="Permalink to this headline">¶</a></h2>
<dl class="function">
<dt id="get_clickable_smileys">
<tt class="descname">get_clickable_smileys</tt><big>(</big><em>$image_url</em><span class="optional">[</span>, <em>$alias = ''</em><span class="optional">[</span>, <em>$smileys = NULL</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#get_clickable_smileys" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$image_url</strong> (<em>string</em>) – URL path to the smileys directory</li>
<li><strong>$alias</strong> (<em>string</em>) – Field alias</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">An array of ready to use smileys</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
</td>
</tr>
</tbody>
</table>
<p>Returns an array containing your smiley images wrapped in a clickable
link. You must supply the URL to your smiley folder and a field id or
field alias.</p>
<p>Example:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$image_array</span> <span class="o">=</span> <span class="nx">get_clickable_smileys</span><span class="p">(</span><span class="s1">'http://example.com/images/smileys/'</span><span class="p">,</span> <span class="s1">'comment'</span><span class="p">);</span>
</pre></div>
</div>
</dd></dl>
<dl class="function">
<dt id="smiley_js">
<tt class="descname">smiley_js</tt><big>(</big><span class="optional">[</span><em>$alias = ''</em><span class="optional">[</span>, <em>$field_id = ''</em><span class="optional">[</span>, <em>$inline = TRUE</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#smiley_js" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$alias</strong> (<em>string</em>) – Field alias</li>
<li><strong>$field_id</strong> (<em>string</em>) – Field ID</li>
<li><strong>$inline</strong> (<em>bool</em>) – Whether we’re inserting an inline smiley</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Smiley-enabling JavaScript code</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p>
</td>
</tr>
</tbody>
</table>
<p>Generates the JavaScript that allows the images to be clicked and
inserted into a form field. If you supplied an alias instead of an id
when generating your smiley links, you need to pass the alias and
corresponding form id into the function. This function is designed to be
placed into the <head> area of your web page.</p>
<p>Example:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="o"><?</span><span class="nx">php</span> <span class="k">echo</span> <span class="nx">smiley_js</span><span class="p">();</span> <span class="cp">?></span>
</pre></div>
</div>
</dd></dl>
<dl class="function">
<dt id="parse_smileys">
<tt class="descname">parse_smileys</tt><big>(</big><span class="optional">[</span><em>$str = ''</em><span class="optional">[</span>, <em>$image_url = ''</em><span class="optional">[</span>, <em>$smileys = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#parse_smileys" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><strong>$str</strong> (<em>string</em>) – Text containing smiley codes</li>
<li><strong>$image_url</strong> (<em>string</em>) – URL path to the smileys directory</li>
<li><strong>$smileys</strong> (<em>array</em>) – An array of smileys</li>
</ul>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Parsed smileys</p>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p>
</td>
</tr>
</tbody>
</table>
<p>Takes a string of text as input and replaces any contained plain text
smileys into the image equivalent. The first parameter must contain your
string, the second must contain the URL to your smiley folder</p>
<p>Example:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$str</span> <span class="o">=</span> <span class="s1">'Here are some smileys: :-) ;-)'</span><span class="p">;</span>
<span class="nv">$str</span> <span class="o">=</span> <span class="nx">parse_smileys</span><span class="p">(</span><span class="nv">$str</span><span class="p">,</span> <span class="s1">'http://example.com/images/smileys/'</span><span class="p">);</span>
<span class="k">echo</span> <span class="nv">$str</span><span class="p">;</span>
</pre></div>
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