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- <div class="section" id="caching-driver">
-<h1>Caching Driver<a class="headerlink" href="#caching-driver" title="Permalink to this headline">¶</a></h1>
-<p>CodeIgniter features wrappers around some of the most popular forms of
-fast and dynamic caching. All but file-based caching require specific
-server requirements, and a Fatal Exception will be thrown if server
-requirements are not met.</p>
-<div class="contents local topic" id="contents">
-<ul class="simple">
-<li><a class="reference internal" href="#example-usage" id="id1">Example Usage</a></li>
-<li><a class="reference internal" href="#class-reference" id="id2">Class Reference</a></li>
-<li><a class="reference internal" href="#drivers" id="id3">Drivers</a><ul>
-<li><a class="reference internal" href="#alternative-php-cache-apc-caching" id="id4">Alternative PHP Cache (APC) Caching</a></li>
-<li><a class="reference internal" href="#file-based-caching" id="id5">File-based Caching</a></li>
-<li><a class="reference internal" href="#memcached-caching" id="id6">Memcached Caching</a></li>
-<li><a class="reference internal" href="#wincache-caching" id="id7">WinCache Caching</a></li>
-<li><a class="reference internal" href="#redis-caching" id="id8">Redis Caching</a></li>
-<li><a class="reference internal" href="#dummy-cache" id="id9">Dummy Cache</a></li>
-</ul>
-</li>
-</ul>
-</div>
-<div class="custom-index container"></div><div class="section" id="example-usage">
-<h2><a class="toc-backref" href="#id1">Example Usage</a><a class="headerlink" href="#example-usage" title="Permalink to this headline">¶</a></h2>
-<p>The following example will load the cache driver, specify <a class="reference external" href="#alternative-php-cache-apc-caching">APC</a>
-as the driver to use, and fall back to file-based caching if APC is not
-available in the hosting environment.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">driver</span><span class="p">(</span><span class="s1">&#39;cache&#39;</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;adapter&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;apc&#39;</span><span class="p">,</span> <span class="s1">&#39;backup&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;file&#39;</span><span class="p">));</span>
-
-<span class="k">if</span> <span class="p">(</span> <span class="o">!</span> <span class="nv">$foo</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">get</span><span class="p">(</span><span class="s1">&#39;foo&#39;</span><span class="p">))</span>
-<span class="p">{</span>
- <span class="k">echo</span> <span class="s1">&#39;Saving to the cache!&lt;br /&gt;&#39;</span><span class="p">;</span>
- <span class="nv">$foo</span> <span class="o">=</span> <span class="s1">&#39;foobarbaz!&#39;</span><span class="p">;</span>
-
- <span class="c1">// Save into the cache for 5 minutes</span>
- <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;foo&#39;</span><span class="p">,</span> <span class="nv">$foo</span><span class="p">,</span> <span class="mi">300</span><span class="p">);</span>
-<span class="p">}</span>
-
-<span class="k">echo</span> <span class="nv">$foo</span><span class="p">;</span>
-</pre></div>
-</div>
-<p>You can also prefix cache item names via the <strong>key_prefix</strong> setting, which is useful
-to avoid collisions when you’re running multiple applications on the same environment.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">driver</span><span class="p">(</span><span class="s1">&#39;cache&#39;</span><span class="p">,</span>
- <span class="k">array</span><span class="p">(</span><span class="s1">&#39;adapter&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;apc&#39;</span><span class="p">,</span> <span class="s1">&#39;backup&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;file&#39;</span><span class="p">,</span> <span class="s1">&#39;key_prefix&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;my_&#39;</span><span class="p">)</span>
-<span class="p">);</span>
-
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">get</span><span class="p">(</span><span class="s1">&#39;foo&#39;</span><span class="p">);</span> <span class="c1">// Will get the cache entry named &#39;my_foo&#39;</span>
-</pre></div>
-</div>
-</div>
-<div class="section" id="class-reference">
-<h2><a class="toc-backref" href="#id2">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2>
-<dl class="class">
-<dt id="CI_Cache">
-<em class="property">class </em><code class="descname">CI_Cache</code><a class="headerlink" href="#CI_Cache" title="Permalink to this definition">¶</a></dt>
-<dd><dl class="method">
-<dt id="CI_Cache::is_supported">
-<code class="descname">is_supported</code><span class="sig-paren">(</span><em>$driver</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::is_supported" 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>$driver</strong> (<em>string</em>) – the name of the caching driver</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE if supported, FALSE if not</p>
-</td>
-</tr>
-<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
-</td>
-</tr>
-</tbody>
-</table>
-<p>This method is automatically called when accessing drivers via
-<code class="docutils literal"><span class="pre">$this-&gt;cache-&gt;get()</span></code>. However, if the individual drivers are used,
-make sure to call this method to ensure the driver is supported in the
-hosting environment.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">apc</span><span class="o">-&gt;</span><span class="na">is_supported</span><span class="p">())</span>
-<span class="p">{</span>
- <span class="k">if</span> <span class="p">(</span><span class="nv">$data</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">apc</span><span class="o">-&gt;</span><span class="na">get</span><span class="p">(</span><span class="s1">&#39;my_cache&#39;</span><span class="p">))</span>
- <span class="p">{</span>
- <span class="c1">// do things.</span>
- <span class="p">}</span>
-<span class="p">}</span>
-</pre></div>
-</div>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Cache::get">
-<code class="descname">get</code><span class="sig-paren">(</span><em>$id</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::get" 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>$id</strong> (<em>string</em>) – Cache item name</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Item value or FALSE if not found</p>
-</td>
-</tr>
-<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
-</td>
-</tr>
-</tbody>
-</table>
-<p>This method will attempt to fetch an item from the cache store. If the
-item does not exist, the method will return FALSE.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$foo</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">get</span><span class="p">(</span><span class="s1">&#39;my_cached_item&#39;</span><span class="p">);</span>
-</pre></div>
-</div>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Cache::save">
-<code class="descname">save</code><span class="sig-paren">(</span><em>$id</em>, <em>$data</em><span class="optional">[</span>, <em>$ttl = 60</em><span class="optional">[</span>, <em>$raw = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::save" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
-<li><strong>$id</strong> (<em>string</em>) – Cache item name</li>
-<li><strong>$data</strong> (<em>mixed</em>) – the data to save</li>
-<li><strong>$ttl</strong> (<em>int</em>) – Time To Live, in seconds (default 60)</li>
-<li><strong>$raw</strong> (<em>bool</em>) – Whether to store the raw value</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p>
-</td>
-</tr>
-<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p>
-</td>
-</tr>
-</tbody>
-</table>
-<p>This method will save an item to the cache store. If saving fails, the
-method will return FALSE.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;cache_item_id&#39;</span><span class="p">,</span> <span class="s1">&#39;data_to_cache&#39;</span><span class="p">);</span>
-</pre></div>
-</div>
-<div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">The <code class="docutils literal"><span class="pre">$raw</span></code> parameter is only utilized by APC and Memcache,
-in order to allow usage of <code class="docutils literal"><span class="pre">increment()</span></code> and <code class="docutils literal"><span class="pre">decrement()</span></code>.</p>
-</div>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Cache::delete">
-<code class="descname">delete</code><span class="sig-paren">(</span><em>$id</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::delete" 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>$id</strong> (<em>string</em>) – name of cached item</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p>
-</td>
-</tr>
-<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
-</td>
-</tr>
-</tbody>
-</table>
-<p>This method will delete a specific item from the cache store. If item
-deletion fails, the method will return FALSE.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">delete</span><span class="p">(</span><span class="s1">&#39;cache_item_id&#39;</span><span class="p">);</span>
-</pre></div>
-</div>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Cache::increment">
-<code class="descname">increment</code><span class="sig-paren">(</span><em>$id</em><span class="optional">[</span>, <em>$offset = 1</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::increment" 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>$id</strong> (<em>string</em>) – Cache ID</li>
-<li><strong>$offset</strong> (<em>int</em>) – Step/value to add</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">New value on success, FALSE on failure</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>Performs atomic incrementation of a raw stored value.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// &#39;iterator&#39; has a value of 2</span>
-
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">increment</span><span class="p">(</span><span class="s1">&#39;iterator&#39;</span><span class="p">);</span> <span class="c1">// &#39;iterator&#39; is now 3</span>
-
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">increment</span><span class="p">(</span><span class="s1">&#39;iterator&#39;</span><span class="p">,</span> <span class="mi">3</span><span class="p">);</span> <span class="c1">// &#39;iterator&#39; is now 6</span>
-</pre></div>
-</div>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Cache::decrement">
-<code class="descname">decrement</code><span class="sig-paren">(</span><em>$id</em><span class="optional">[</span>, <em>$offset = 1</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::decrement" 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>$id</strong> (<em>string</em>) – Cache ID</li>
-<li><strong>$offset</strong> (<em>int</em>) – Step/value to reduce by</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">New value on success, FALSE on failure</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>Performs atomic decrementation of a raw stored value.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// &#39;iterator&#39; has a value of 6</span>
-
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">decrement</span><span class="p">(</span><span class="s1">&#39;iterator&#39;</span><span class="p">);</span> <span class="c1">// &#39;iterator&#39; is now 5</span>
-
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">decrement</span><span class="p">(</span><span class="s1">&#39;iterator&#39;</span><span class="p">,</span> <span class="mi">2</span><span class="p">);</span> <span class="c1">// &#39;iterator&#39; is now 3</span>
-</pre></div>
-</div>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Cache::clean">
-<code class="descname">clean</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::clean" 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">Returns:</th><td class="field-body">TRUE on success, FALSE on failure</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">bool</td>
-</tr>
-</tbody>
-</table>
-<p>This method will ‘clean’ the entire cache. If the deletion of the
-cache files fails, the method will return FALSE.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">clean</span><span class="p">();</span>
-</pre></div>
-</div>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Cache::cache_info">
-<code class="descname">cache_info</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::cache_info" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Information on the entire cache database</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">mixed</td>
-</tr>
-</tbody>
-</table>
-<p>This method will return information on the entire cache.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nb">var_dump</span><span class="p">(</span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">cache_info</span><span class="p">());</span>
-</pre></div>
-</div>
-<div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">The information returned and the structure of the data is dependent
-on which adapter is being used.</p>
-</div>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Cache::get_metadata">
-<code class="descname">get_metadata</code><span class="sig-paren">(</span><em>$id</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::get_metadata" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
-<li><strong>$id</strong> (<em>string</em>) – Cache item name</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Metadata for the cached 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>This method will return detailed information on a specific item in the
-cache.</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nb">var_dump</span><span class="p">(</span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">get_metadata</span><span class="p">(</span><span class="s1">&#39;my_cached_item&#39;</span><span class="p">));</span>
-</pre></div>
-</div>
-<div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">The information returned and the structure of the data is dependent
-on which adapter is being used.</p>
-</div>
-</dd></dl>
-
-</dd></dl>
-
-</div>
-<div class="section" id="drivers">
-<h2><a class="toc-backref" href="#id3">Drivers</a><a class="headerlink" href="#drivers" title="Permalink to this headline">¶</a></h2>
-<div class="section" id="alternative-php-cache-apc-caching">
-<h3><a class="toc-backref" href="#id4">Alternative PHP Cache (APC) Caching</a><a class="headerlink" href="#alternative-php-cache-apc-caching" title="Permalink to this headline">¶</a></h3>
-<p>All of the methods listed above can be accessed without passing a
-specific adapter to the driver loader as follows:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">driver</span><span class="p">(</span><span class="s1">&#39;cache&#39;</span><span class="p">);</span>
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">apc</span><span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;foo&#39;</span><span class="p">,</span> <span class="s1">&#39;bar&#39;</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span>
-</pre></div>
-</div>
-<p>For more information on APC, please see
-<a class="reference external" href="http://php.net/apc">http://php.net/apc</a>.</p>
-</div>
-<div class="section" id="file-based-caching">
-<h3><a class="toc-backref" href="#id5">File-based Caching</a><a class="headerlink" href="#file-based-caching" title="Permalink to this headline">¶</a></h3>
-<p>Unlike caching from the Output Class, the driver file-based caching
-allows for pieces of view files to be cached. Use this with care, and
-make sure to benchmark your application, as a point can come where disk
-I/O will negate positive gains by caching.</p>
-<p>All of the methods listed above can be accessed without passing a
-specific adapter to the driver loader as follows:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">driver</span><span class="p">(</span><span class="s1">&#39;cache&#39;</span><span class="p">);</span>
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">file</span><span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;foo&#39;</span><span class="p">,</span> <span class="s1">&#39;bar&#39;</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span>
-</pre></div>
-</div>
-</div>
-<div class="section" id="memcached-caching">
-<h3><a class="toc-backref" href="#id6">Memcached Caching</a><a class="headerlink" href="#memcached-caching" title="Permalink to this headline">¶</a></h3>
-<p>Multiple Memcached servers can be specified in the memcached.php
-configuration file, located in the _application/config/* directory.</p>
-<p>All of the methods listed above can be accessed without passing a
-specific adapter to the driver loader as follows:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">driver</span><span class="p">(</span><span class="s1">&#39;cache&#39;</span><span class="p">);</span>
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">memcached</span><span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;foo&#39;</span><span class="p">,</span> <span class="s1">&#39;bar&#39;</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span>
-</pre></div>
-</div>
-<p>For more information on Memcached, please see
-<a class="reference external" href="http://php.net/memcached">http://php.net/memcached</a>.</p>
-</div>
-<div class="section" id="wincache-caching">
-<h3><a class="toc-backref" href="#id7">WinCache Caching</a><a class="headerlink" href="#wincache-caching" title="Permalink to this headline">¶</a></h3>
-<p>Under Windows, you can also utilize the WinCache driver.</p>
-<p>All of the methods listed above can be accessed without passing a
-specific adapter to the driver loader as follows:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">driver</span><span class="p">(</span><span class="s1">&#39;cache&#39;</span><span class="p">);</span>
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">wincache</span><span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;foo&#39;</span><span class="p">,</span> <span class="s1">&#39;bar&#39;</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span>
-</pre></div>
-</div>
-<p>For more information on WinCache, please see
-<a class="reference external" href="http://php.net/wincache">http://php.net/wincache</a>.</p>
-</div>
-<div class="section" id="redis-caching">
-<h3><a class="toc-backref" href="#id8">Redis Caching</a><a class="headerlink" href="#redis-caching" title="Permalink to this headline">¶</a></h3>
-<p>Redis is an in-memory key-value store which can operate in LRU cache mode.
-To use it, you need <a class="reference external" href="https://github.com/phpredis/phpredis">Redis server and phpredis PHP extension</a>.</p>
-<p>Config options to connect to redis server must be stored in the application/config/redis.php file.
-Available options are:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;socket_type&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;tcp&#39;</span><span class="p">;</span> <span class="c1">//`tcp` or `unix`</span>
-<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;socket&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;/var/run/redis.sock&#39;</span><span class="p">;</span> <span class="c1">// in case of `unix` socket type</span>
-<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;host&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;127.0.0.1&#39;</span><span class="p">;</span>
-<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;password&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="k">NULL</span><span class="p">;</span>
-<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;port&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="mi">6379</span><span class="p">;</span>
-<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;timeout&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
-</pre></div>
-</div>
-<p>All of the methods listed above can be accessed without passing a
-specific adapter to the driver loader as follows:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">driver</span><span class="p">(</span><span class="s1">&#39;cache&#39;</span><span class="p">);</span>
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">cache</span><span class="o">-&gt;</span><span class="na">redis</span><span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;foo&#39;</span><span class="p">,</span> <span class="s1">&#39;bar&#39;</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span>
-</pre></div>
-</div>
-<p>For more information on Redis, please see
-<a class="reference external" href="http://redis.io">http://redis.io</a>.</p>
-</div>
-<div class="section" id="dummy-cache">
-<h3><a class="toc-backref" href="#id9">Dummy Cache</a><a class="headerlink" href="#dummy-cache" title="Permalink to this headline">¶</a></h3>
-<p>This is a caching backend that will always ‘miss.’ It stores no data,
-but lets you keep your caching code in place in environments that don’t
-support your chosen cache.</p>
-</div>
-</div>
-</div>
-
-
- </div>
- <footer>
-
- <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
-
- <a href="calendar.html" class="btn btn-neutral float-right" title="Calendaring Class">Next <span class="fa fa-arrow-circle-right"></span></a>
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- &copy; Copyright 2014 - 2018, British Columbia Institute of Technology.
- Last updated on Mar 22, 2018.
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