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+<li class="toctree-l1 current"><a class="reference internal" href="index.html">Helpers</a><ul class="current">
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Array Helper</a></li>
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+            
+  <div class="section" id="array-helper">
+<h1>Array Helper<a class="headerlink" href="#array-helper" title="Permalink to this headline">¶</a></h1>
+<p>The Array Helper file contains functions that assist in working with
+arrays.</p>
+<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="#available-functions" id="id2">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></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">helper</span><span class="p">(</span><span class="s1">&#39;array&#39;</span><span class="p">);</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="available-functions">
+<h2><a class="toc-backref" href="#id2">Available Functions</a><a class="headerlink" href="#available-functions" title="Permalink to this headline">¶</a></h2>
+<p>The following functions are available:</p>
+<dl class="function">
+<dt id="element">
+<code class="descname">element</code><span class="sig-paren">(</span><em>$item</em>, <em>$array</em><span class="optional">[</span>, <em>$default = NULL</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#element" 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>$item</strong> (<em>string</em>) – Item to fetch from the array</li>
+<li><strong>$array</strong> (<em>array</em>) – Input array</li>
+<li><strong>$default</strong> (<em>bool</em>) – What to return if the array isn’t valid</li>
+</ul>
+</td>
+</tr>
+<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">NULL on failure or the array item.</p>
+</td>
+</tr>
+<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
+</td>
+</tr>
+</tbody>
+</table>
+<p>Lets you fetch an item from an array. The function tests whether the
+array index is set and whether it has a value. If a value exists it is
+returned. If a value does not exist it returns NULL, or whatever you’ve
+specified as the default value via the third parameter.</p>
+<p>Example:</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$array</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
+        <span class="s1">&#39;color&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;red&#39;</span><span class="p">,</span>
+        <span class="s1">&#39;shape&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;round&#39;</span><span class="p">,</span>
+        <span class="s1">&#39;size&#39;</span>  <span class="o">=&gt;</span> <span class="s1">&#39;&#39;</span>
+<span class="p">);</span>
+
+<span class="k">echo</span> <span class="nx">element</span><span class="p">(</span><span class="s1">&#39;color&#39;</span><span class="p">,</span> <span class="nv">$array</span><span class="p">);</span> <span class="c1">// returns &quot;red&quot;</span>
+<span class="k">echo</span> <span class="nx">element</span><span class="p">(</span><span class="s1">&#39;size&#39;</span><span class="p">,</span> <span class="nv">$array</span><span class="p">,</span> <span class="s1">&#39;foobar&#39;</span><span class="p">);</span> <span class="c1">// returns &quot;foobar&quot;</span>
+</pre></div>
+</div>
+</dd></dl>
+
+<dl class="function">
+<dt id="elements">
+<code class="descname">elements</code><span class="sig-paren">(</span><em>$items</em>, <em>$array</em><span class="optional">[</span>, <em>$default = NULL</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#elements" title="Permalink to this definition">¶</a></dt>
+<dd><table class="docutils field-list" frame="void" rules="none">
+<col class="field-name" />
+<col class="field-body" />
+<tbody valign="top">
+<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
+<li><strong>$item</strong> (<em>string</em>) – Item to fetch from the array</li>
+<li><strong>$array</strong> (<em>array</em>) – Input array</li>
+<li><strong>$default</strong> (<em>bool</em>) – What to return if the array isn’t valid</li>
+</ul>
+</td>
+</tr>
+<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">NULL on failure or the array item.</p>
+</td>
+</tr>
+<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
+</td>
+</tr>
+</tbody>
+</table>
+<p>Lets you fetch a number of items from an array. The function tests
+whether each of the array indices is set. If an index does not exist it
+is set to NULL, or whatever you’ve specified as the default value via
+the third parameter.</p>
+<p>Example:</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$array</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
+        <span class="s1">&#39;color&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;red&#39;</span><span class="p">,</span>
+        <span class="s1">&#39;shape&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;round&#39;</span><span class="p">,</span>
+        <span class="s1">&#39;radius&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;10&#39;</span><span class="p">,</span>
+        <span class="s1">&#39;diameter&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;20&#39;</span>
+<span class="p">);</span>
+
+<span class="nv">$my_shape</span> <span class="o">=</span> <span class="nx">elements</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">&#39;color&#39;</span><span class="p">,</span> <span class="s1">&#39;shape&#39;</span><span class="p">,</span> <span class="s1">&#39;height&#39;</span><span class="p">),</span> <span class="nv">$array</span><span class="p">);</span>
+</pre></div>
+</div>
+<p>The above will return the following array:</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">array</span><span class="p">(</span>
+        <span class="s1">&#39;color&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;red&#39;</span><span class="p">,</span>
+        <span class="s1">&#39;shape&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;round&#39;</span><span class="p">,</span>
+        <span class="s1">&#39;height&#39;</span> <span class="o">=&gt;</span> <span class="k">NULL</span>
+<span class="p">);</span>
+</pre></div>
+</div>
+<p>You can set the third parameter to any default value you like.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$my_shape</span> <span class="o">=</span> <span class="nx">elements</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">&#39;color&#39;</span><span class="p">,</span> <span class="s1">&#39;shape&#39;</span><span class="p">,</span> <span class="s1">&#39;height&#39;</span><span class="p">),</span> <span class="nv">$array</span><span class="p">,</span> <span class="s1">&#39;foobar&#39;</span><span class="p">);</span>
+</pre></div>
+</div>
+<p>The above will return the following array:</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">array</span><span class="p">(</span>
+        <span class="s1">&#39;color&#39;</span>         <span class="o">=&gt;</span> <span class="s1">&#39;red&#39;</span><span class="p">,</span>
+        <span class="s1">&#39;shape&#39;</span>         <span class="o">=&gt;</span> <span class="s1">&#39;round&#39;</span><span class="p">,</span>
+        <span class="s1">&#39;height&#39;</span>        <span class="o">=&gt;</span> <span class="s1">&#39;foobar&#39;</span>
+<span class="p">);</span>
+</pre></div>
+</div>
+<p>This is useful when sending the <code class="docutils literal"><span class="pre">$_POST</span></code> array to one of your Models.
+This prevents users from sending additional POST data to be entered into
+your tables.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">model</span><span class="p">(</span><span class="s1">&#39;post_model&#39;</span><span class="p">);</span>
+<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">post_model</span><span class="o">-&gt;</span><span class="na">update</span><span class="p">(</span>
+        <span class="nx">elements</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">&#39;id&#39;</span><span class="p">,</span> <span class="s1">&#39;title&#39;</span><span class="p">,</span> <span class="s1">&#39;content&#39;</span><span class="p">),</span> <span class="nv">$_POST</span><span class="p">)</span>
+<span class="p">);</span>
+</pre></div>
+</div>
+<p>This ensures that only the id, title and content fields are sent to be
+updated.</p>
+</dd></dl>
+
+<dl class="function">
+<dt id="random_element">
+<code class="descname">random_element</code><span class="sig-paren">(</span><em>$array</em><span class="sig-paren">)</span><a class="headerlink" href="#random_element" 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>$array</strong> (<em>array</em>) – Input array</li>
+</ul>
+</td>
+</tr>
+<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">A random element from the array</p>
+</td>
+</tr>
+<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
+</td>
+</tr>
+</tbody>
+</table>
+<p>Takes an array as input and returns a random element from it.</p>
+<p>Usage example:</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$quotes</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
+        <span class="s2">&quot;I find that the harder I work, the more luck I seem to have. - Thomas Jefferson&quot;</span><span class="p">,</span>
+        <span class="s2">&quot;Don&#39;t stay in bed, unless you can make money in bed. - George Burns&quot;</span><span class="p">,</span>
+        <span class="s2">&quot;We didn&#39;t lose the game; we just ran out of time. - Vince Lombardi&quot;</span><span class="p">,</span>
+        <span class="s2">&quot;If everything seems under control, you&#39;re not going fast enough. - Mario Andretti&quot;</span><span class="p">,</span>
+        <span class="s2">&quot;Reality is merely an illusion, albeit a very persistent one. - Albert Einstein&quot;</span><span class="p">,</span>
+        <span class="s2">&quot;Chance favors the prepared mind - Louis Pasteur&quot;</span>
+<span class="p">);</span>
+
+<span class="k">echo</span> <span class="nx">random_element</span><span class="p">(</span><span class="nv">$quotes</span><span class="p">);</span>
+</pre></div>
+</div>
+</dd></dl>
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