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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">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'cache'</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">'adapter'</span> <span class="o">=></span> <span class="s1">'apc'</span><span class="p">,</span> <span class="s1">'backup'</span> <span class="o">=></span> <span class="s1">'file'</span><span class="p">));</span> |
| |
| <span class="k">if</span> <span class="p">(</span> <span class="o">!</span> <span class="nv">$foo</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'foo'</span><span class="p">))</span> |
| <span class="p">{</span> |
| <span class="k">echo</span> <span class="s1">'Saving to the cache!<br />'</span><span class="p">;</span> |
| <span class="nv">$foo</span> <span class="o">=</span> <span class="s1">'foobarbaz!'</span><span class="p">;</span> |
| |
| <span class="c1">// Save into the cache for 5 minutes</span> |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">save</span><span class="p">(</span><span class="s1">'foo'</span><span class="p">,</span> <span class="nv">$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">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'cache'</span><span class="p">,</span> |
| <span class="k">array</span><span class="p">(</span><span class="s1">'adapter'</span> <span class="o">=></span> <span class="s1">'apc'</span><span class="p">,</span> <span class="s1">'backup'</span> <span class="o">=></span> <span class="s1">'file'</span><span class="p">,</span> <span class="s1">'key_prefix'</span> <span class="o">=></span> <span class="s1">'my_'</span><span class="p">)</span> |
| <span class="p">);</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'foo'</span><span class="p">);</span> <span class="c1">// Will get the cache entry named 'my_foo'</span> |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="class-reference"> |
| <h2><a class="toc-backref" href="#id2">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2> |
| <dl class="class"> |
| <dt id="CI_Cache"> |
| <em class="property">class </em><code class="descname">CI_Cache</code><a class="headerlink" href="#CI_Cache" title="Permalink to this definition">¶</a></dt> |
| <dd><dl class="method"> |
| <dt id="CI_Cache::is_supported"> |
| <code class="descname">is_supported</code><span class="sig-paren">(</span><em>$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->cache->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">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">apc</span><span class="o">-></span><span class="na">is_supported</span><span class="p">())</span> |
| <span class="p">{</span> |
| <span class="k">if</span> <span class="p">(</span><span class="nv">$data</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">apc</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'my_cache'</span><span class="p">))</span> |
| <span class="p">{</span> |
| <span class="c1">// do things.</span> |
| <span class="p">}</span> |
| <span class="p">}</span> |
| </pre></div> |
| </div> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cache::get"> |
| <code class="descname">get</code><span class="sig-paren">(</span><em>$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">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'my_cached_item'</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cache::save"> |
| <code class="descname">save</code><span class="sig-paren">(</span><em>$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">-></span><span class="na">cache</span><span class="o">-></span><span class="na">save</span><span class="p">(</span><span class="s1">'cache_item_id'</span><span class="p">,</span> <span class="s1">'data_to_cache'</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">-></span><span class="na">cache</span><span class="o">-></span><span class="na">delete</span><span class="p">(</span><span class="s1">'cache_item_id'</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">// 'iterator' has a value of 2</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">increment</span><span class="p">(</span><span class="s1">'iterator'</span><span class="p">);</span> <span class="c1">// 'iterator' is now 3</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">increment</span><span class="p">(</span><span class="s1">'iterator'</span><span class="p">,</span> <span class="mi">3</span><span class="p">);</span> <span class="c1">// 'iterator' 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">// 'iterator' has a value of 6</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">decrement</span><span class="p">(</span><span class="s1">'iterator'</span><span class="p">);</span> <span class="c1">// 'iterator' is now 5</span> |
| |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">decrement</span><span class="p">(</span><span class="s1">'iterator'</span><span class="p">,</span> <span class="mi">2</span><span class="p">);</span> <span class="c1">// 'iterator' 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">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">clean</span><span class="p">();</span> |
| </pre></div> |
| </div> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="CI_Cache::cache_info"> |
| <code class="descname">cache_info</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Cache::cache_info" title="Permalink to this definition">¶</a></dt> |
| <dd><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Information on the entire cache database</td> |
| </tr> |
| <tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">mixed</td> |
| </tr> |
| </tbody> |
| </table> |
| <p>This method will return information on the entire cache.</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nb">var_dump</span><span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></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">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">get_metadata</span><span class="p">(</span><span class="s1">'my_cached_item'</span><span class="p">));</span> |
| </pre></div> |
| </div> |
| <div class="admonition note"> |
| <p class="first admonition-title">Note</p> |
| <p class="last">The information returned and the structure of the data is dependent |
| on which adapter is being used.</p> |
| </div> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| </div> |
| <div class="section" id="drivers"> |
| <h2><a class="toc-backref" href="#id3">Drivers</a><a class="headerlink" href="#drivers" title="Permalink to this headline">¶</a></h2> |
| <div class="section" id="alternative-php-cache-apc-caching"> |
| <h3><a class="toc-backref" href="#id4">Alternative PHP Cache (APC) Caching</a><a class="headerlink" href="#alternative-php-cache-apc-caching" title="Permalink to this headline">¶</a></h3> |
| <p>All of the methods listed above can be accessed without passing a |
| specific adapter to the driver loader as follows:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'cache'</span><span class="p">);</span> |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">apc</span><span class="o">-></span><span class="na">save</span><span class="p">(</span><span class="s1">'foo'</span><span class="p">,</span> <span class="s1">'bar'</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>For more information on APC, please see |
| <a class="reference external" href="http://php.net/apc">http://php.net/apc</a>.</p> |
| </div> |
| <div class="section" id="file-based-caching"> |
| <h3><a class="toc-backref" href="#id5">File-based Caching</a><a class="headerlink" href="#file-based-caching" title="Permalink to this headline">¶</a></h3> |
| <p>Unlike caching from the Output Class, the driver file-based caching |
| allows for pieces of view files to be cached. Use this with care, and |
| make sure to benchmark your application, as a point can come where disk |
| I/O will negate positive gains by caching.</p> |
| <p>All of the methods listed above can be accessed without passing a |
| specific adapter to the driver loader as follows:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'cache'</span><span class="p">);</span> |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">file</span><span class="o">-></span><span class="na">save</span><span class="p">(</span><span class="s1">'foo'</span><span class="p">,</span> <span class="s1">'bar'</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="memcached-caching"> |
| <h3><a class="toc-backref" href="#id6">Memcached Caching</a><a class="headerlink" href="#memcached-caching" title="Permalink to this headline">¶</a></h3> |
| <p>Multiple Memcached servers can be specified in the memcached.php |
| configuration file, located in the _application/config/* directory.</p> |
| <p>All of the methods listed above can be accessed without passing a |
| specific adapter to the driver loader as follows:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'cache'</span><span class="p">);</span> |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">memcached</span><span class="o">-></span><span class="na">save</span><span class="p">(</span><span class="s1">'foo'</span><span class="p">,</span> <span class="s1">'bar'</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>For more information on Memcached, please see |
| <a class="reference external" href="http://php.net/memcached">http://php.net/memcached</a>.</p> |
| </div> |
| <div class="section" id="wincache-caching"> |
| <h3><a class="toc-backref" href="#id7">WinCache Caching</a><a class="headerlink" href="#wincache-caching" title="Permalink to this headline">¶</a></h3> |
| <p>Under Windows, you can also utilize the WinCache driver.</p> |
| <p>All of the methods listed above can be accessed without passing a |
| specific adapter to the driver loader as follows:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'cache'</span><span class="p">);</span> |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">wincache</span><span class="o">-></span><span class="na">save</span><span class="p">(</span><span class="s1">'foo'</span><span class="p">,</span> <span class="s1">'bar'</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>For more information on WinCache, please see |
| <a class="reference external" href="http://php.net/wincache">http://php.net/wincache</a>.</p> |
| </div> |
| <div class="section" id="redis-caching"> |
| <h3><a class="toc-backref" href="#id8">Redis Caching</a><a class="headerlink" href="#redis-caching" title="Permalink to this headline">¶</a></h3> |
| <p>Redis is an in-memory key-value store which can operate in LRU cache mode. |
| To use it, you need <a class="reference external" href="https://github.com/phpredis/phpredis">Redis server and phpredis PHP extension</a>.</p> |
| <p>Config options to connect to redis server must be stored in the application/config/redis.php file. |
| Available options are:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span><span class="p">[</span><span class="s1">'socket_type'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'tcp'</span><span class="p">;</span> <span class="c1">//`tcp` or `unix`</span> |
| <span class="nv">$config</span><span class="p">[</span><span class="s1">'socket'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'/var/run/redis.sock'</span><span class="p">;</span> <span class="c1">// in case of `unix` socket type</span> |
| <span class="nv">$config</span><span class="p">[</span><span class="s1">'host'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'127.0.0.1'</span><span class="p">;</span> |
| <span class="nv">$config</span><span class="p">[</span><span class="s1">'password'</span><span class="p">]</span> <span class="o">=</span> <span class="k">NULL</span><span class="p">;</span> |
| <span class="nv">$config</span><span class="p">[</span><span class="s1">'port'</span><span class="p">]</span> <span class="o">=</span> <span class="mi">6379</span><span class="p">;</span> |
| <span class="nv">$config</span><span class="p">[</span><span class="s1">'timeout'</span><span class="p">]</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> |
| </pre></div> |
| </div> |
| <p>All of the methods listed above can be accessed without passing a |
| specific adapter to the driver loader as follows:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'cache'</span><span class="p">);</span> |
| <span class="nv">$this</span><span class="o">-></span><span class="na">cache</span><span class="o">-></span><span class="na">redis</span><span class="o">-></span><span class="na">save</span><span class="p">(</span><span class="s1">'foo'</span><span class="p">,</span> <span class="s1">'bar'</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> |
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