? Fallagassrini

Fallagassrini Bypass Shell

echo"
Fallagassrini
";
Current Path : /home1/savoy/public_html/savoyeducation.com/user_guide/general/

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  <div class="section" id="models">
<h1><a class="toc-backref" href="#id1">Models</a><a class="headerlink" href="#models" title="Permalink to this headline">¶</a></h1>
<p>Models are <strong>optionally</strong> available for those who want to use a more
traditional MVC approach.</p>
<div class="contents topic" id="page-contents">
<p class="topic-title first">Page Contents</p>
<ul class="simple">
<li><a class="reference internal" href="#models" id="id1">Models</a><ul>
<li><a class="reference internal" href="#what-is-a-model" id="id2">What is a Model?</a></li>
<li><a class="reference internal" href="#anatomy-of-a-model" id="id3">Anatomy of a Model</a></li>
<li><a class="reference internal" href="#loading-a-model" id="id4">Loading a Model</a></li>
<li><a class="reference internal" href="#auto-loading-models" id="id5">Auto-loading Models</a></li>
<li><a class="reference internal" href="#connecting-to-your-database" id="id6">Connecting to your Database</a></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="what-is-a-model">
<h2><a class="toc-backref" href="#id2">What is a Model?</a><a class="headerlink" href="#what-is-a-model" title="Permalink to this headline">¶</a></h2>
<p>Models are PHP classes that are designed to work with information in
your database. For example, let&#8217;s say you use CodeIgniter to manage a
blog. You might have a model class that contains functions to insert,
update, and retrieve your blog data. Here is an example of what such a
model class might look like:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="k">class</span> <span class="nc">Blog_model</span> <span class="k">extends</span> <span class="nx">CI_Model</span> <span class="p">{</span>

        <span class="k">public</span> <span class="nv">$title</span><span class="p">;</span>
        <span class="k">public</span> <span class="nv">$content</span><span class="p">;</span>
        <span class="k">public</span> <span class="nv">$date</span><span class="p">;</span>

        <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">()</span>
        <span class="p">{</span>
                <span class="c1">// Call the CI_Model constructor</span>
                <span class="k">parent</span><span class="o">::</span><span class="na">__construct</span><span class="p">();</span>
        <span class="p">}</span>

        <span class="k">public</span> <span class="k">function</span> <span class="nf">get_last_ten_entries</span><span class="p">()</span>
        <span class="p">{</span>
                <span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">get</span><span class="p">(</span><span class="s1">&#39;entries&#39;</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span>
                <span class="k">return</span> <span class="nv">$query</span><span class="o">-&gt;</span><span class="na">result</span><span class="p">();</span>
        <span class="p">}</span>

        <span class="k">public</span> <span class="k">function</span> <span class="nf">insert_entry</span><span class="p">()</span>
        <span class="p">{</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">title</span>    <span class="o">=</span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">&#39;title&#39;</span><span class="p">];</span> <span class="c1">// please read the below note</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">content</span>  <span class="o">=</span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">&#39;content&#39;</span><span class="p">];</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">date</span>     <span class="o">=</span> <span class="nb">time</span><span class="p">();</span>

                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">insert</span><span class="p">(</span><span class="s1">&#39;entries&#39;</span><span class="p">,</span> <span class="nv">$this</span><span class="p">);</span>
        <span class="p">}</span>

        <span class="k">public</span> <span class="k">function</span> <span class="nf">update_entry</span><span class="p">()</span>
        <span class="p">{</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">title</span>    <span class="o">=</span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">&#39;title&#39;</span><span class="p">];</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">content</span>  <span class="o">=</span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">&#39;content&#39;</span><span class="p">];</span>
                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">date</span>     <span class="o">=</span> <span class="nb">time</span><span class="p">();</span>

                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">update</span><span class="p">(</span><span class="s1">&#39;entries&#39;</span><span class="p">,</span> <span class="nv">$this</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;id&#39;</span> <span class="o">=&gt;</span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">&#39;id&#39;</span><span class="p">]));</span>
        <span class="p">}</span>

<span class="p">}</span>
</pre></div>
</div>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The methods in the above example use the <a class="reference internal" href="../database/query_builder.html"><em>Query Builder</em></a> database methods.</p>
</div>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">For the sake of simplicity in this example we&#8217;re using <tt class="docutils literal"><span class="pre">$_POST</span></tt>
directly. This is generally bad practice, and a more common approach
would be to use the <a class="reference internal" href="../libraries/input.html"><em>Input Library</em></a>
<tt class="docutils literal"><span class="pre">$this-&gt;input-&gt;post('title')</span></tt>.</p>
</div>
</div>
<div class="section" id="anatomy-of-a-model">
<h2><a class="toc-backref" href="#id3">Anatomy of a Model</a><a class="headerlink" href="#anatomy-of-a-model" title="Permalink to this headline">¶</a></h2>
<p>Model classes are stored in your <strong>application/models/</strong> directory.
They can be nested within sub-directories if you want this type of
organization.</p>
<p>The basic prototype for a model class is this:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="k">class</span> <span class="nc">Model_name</span> <span class="k">extends</span> <span class="nx">CI_Model</span> <span class="p">{</span>

        <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">()</span>
        <span class="p">{</span>
                <span class="k">parent</span><span class="o">::</span><span class="na">__construct</span><span class="p">();</span>
        <span class="p">}</span>

<span class="p">}</span>
</pre></div>
</div>
<p>Where <strong>Model_name</strong> is the name of your class. Class names <strong>must</strong> have
the first letter capitalized with the rest of the name lowercase. Make
sure your class extends the base Model class.</p>
<p>The file name must match the class name. For example, if this is your class:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="k">class</span> <span class="nc">User_model</span> <span class="k">extends</span> <span class="nx">CI_Model</span> <span class="p">{</span>

        <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">()</span>
        <span class="p">{</span>
                <span class="k">parent</span><span class="o">::</span><span class="na">__construct</span><span class="p">();</span>
        <span class="p">}</span>

<span class="p">}</span>
</pre></div>
</div>
<p>Your file will be this:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nx">application</span><span class="o">/</span><span class="nx">models</span><span class="o">/</span><span class="nx">User_model</span><span class="o">.</span><span class="nx">php</span>
</pre></div>
</div>
</div>
<div class="section" id="loading-a-model">
<h2><a class="toc-backref" href="#id4">Loading a Model</a><a class="headerlink" href="#loading-a-model" title="Permalink to this headline">¶</a></h2>
<p>Your models will typically be loaded and called from within your
<a class="reference internal" href="controllers.html"><em>controller</em></a> methods. To load a model you will use
the following method:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">model</span><span class="p">(</span><span class="s1">&#39;model_name&#39;</span><span class="p">);</span>
</pre></div>
</div>
<p>If your model is located in a sub-directory, include the relative path
from your models directory. For example, if you have a model located at
<em>application/models/blog/Queries.php</em> you&#8217;ll load it using:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$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;blog/queries&#39;</span><span class="p">);</span>
</pre></div>
</div>
<p>Once loaded, you will access your model methods using an object with the
same name as your class:</p>
<div class="highlight-ci"><div class="highlight"><pre><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;model_name&#39;</span><span class="p">);</span>

<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">model_name</span><span class="o">-&gt;</span><span class="na">method</span><span class="p">();</span>
</pre></div>
</div>
<p>If you would like your model assigned to a different object name you can
specify it via the second parameter of the loading method:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$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;model_name&#39;</span><span class="p">,</span> <span class="s1">&#39;foobar&#39;</span><span class="p">);</span>

<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">foobar</span><span class="o">-&gt;</span><span class="na">method</span><span class="p">();</span>
</pre></div>
</div>
<p>Here is an example of a controller, that loads a model, then serves a
view:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="k">class</span> <span class="nc">Blog_controller</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">blog</span><span class="p">()</span>
        <span class="p">{</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;blog&#39;</span><span class="p">);</span>

                <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;query&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">blog</span><span class="o">-&gt;</span><span class="na">get_last_ten_entries</span><span class="p">();</span>

                <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">view</span><span class="p">(</span><span class="s1">&#39;blog&#39;</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>
        <span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
</div>
<div class="section" id="auto-loading-models">
<h2><a class="toc-backref" href="#id5">Auto-loading Models</a><a class="headerlink" href="#auto-loading-models" title="Permalink to this headline">¶</a></h2>
<p>If you find that you need a particular model globally throughout your
application, you can tell CodeIgniter to auto-load it during system
initialization. This is done by opening the
<strong>application/config/autoload.php</strong> file and adding the model to the
autoload array.</p>
</div>
<div class="section" id="connecting-to-your-database">
<h2><a class="toc-backref" href="#id6">Connecting to your Database</a><a class="headerlink" href="#connecting-to-your-database" title="Permalink to this headline">¶</a></h2>
<p>When a model is loaded it does <strong>NOT</strong> connect automatically to your
database. The following options for connecting are available to you:</p>
<ul>
<li><p class="first">You can connect using the standard database methods <a class="reference internal" href="../database/connecting.html"><em>described
here</em></a>, either from within your
Controller class or your Model class.</p>
</li>
<li><p class="first">You can tell the model loading method to auto-connect by passing
TRUE (boolean) via the third parameter, and connectivity settings,
as defined in your database config file will be used:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">model</span><span class="p">(</span><span class="s1">&#39;model_name&#39;</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
</pre></div>
</div>
</li>
<li><p class="first">You can manually pass database connectivity settings via the third
parameter:</p>
<div class="highlight-ci"><div class="highlight"><pre><span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;hostname&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;localhost&#39;</span><span class="p">;</span>
<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;username&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;myusername&#39;</span><span class="p">;</span>
<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;password&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;mypassword&#39;</span><span class="p">;</span>
<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;database&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;mydatabase&#39;</span><span class="p">;</span>
<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;dbdriver&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;mysqli&#39;</span><span class="p">;</span>
<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;dbprefix&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span><span class="p">;</span>
<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;pconnect&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="k">FALSE</span><span class="p">;</span>
<span class="nv">$config</span><span class="p">[</span><span class="s1">&#39;db_debug&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="k">TRUE</span><span class="p">;</span>

<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">model</span><span class="p">(</span><span class="s1">&#39;model_name&#39;</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">,</span> <span class="nv">$config</span><span class="p">);</span>
</pre></div>
</div>
</li>
</ul>
</div>
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