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<li class="toctree-l2"><a class="reference internal" href="../incoming/restful.html">RESTful Resource Handling</a></li>
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<ul class="current">
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<li class="toctree-l1 current"><a class="reference internal" href="index.html">Working With Databases</a><ul class="current">
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<li class="toctree-l2 current"><a class="current reference internal" href="#">Quick Start: Usage Examples</a></li>
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<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
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<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
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<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
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<li class="toctree-l2"><a class="reference internal" href="events.html">Database Events</a></li>
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<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../models/index.html">Modeling Data</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../models/model.html">Using CodeIgniter's Model</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../models/entities.html">Using Entity Classes</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../dbmgmt/index.html">Managing Databases</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../dbmgmt/forge.html">Database Manipulation with Database Forge</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../dbmgmt/migration.html">Database Migrations</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../dbmgmt/seeds.html">Database Seeding</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../dbmgmt/db_commands.html">Database Commands</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Library Reference</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/curlrequest.html">CURLRequest Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Service</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/honeypot.html">Honeypot Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/images.html">Image Manipulation Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/uploaded_files.html">Working with Uploaded Files</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">Working with URIs</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/validation.html">Validation</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/test_helper.html">Test Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../testing/index.html">Testing</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../testing/overview.html">Getting Started</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/database.html">Database</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/fabricator.html">Generating Data</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/controllers.html">Controller Testing</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/feature.html">HTTP Testing</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/response.html">Testing Responses</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/benchmark.html">Benchmarking</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/debugging.html">Debugging Your Application</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../testing/mocking.html">Mocking</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../cli/index.html">Command Line Usage</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_controllers.html">Running Controllers via CLI</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_commands.html">Creating Spark Commands</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_generators.html">CLI Generators</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_library.html">CLI Library</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../cli/cli_request.html">CLIRequest Class</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../extending/index.html">Extending CodeIgniter</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../extending/core_classes.html">Creating Core System Classes</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/common.html">Replacing Common Functions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/events.html">Events</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/basecontroller.html">Extending the Controller</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/authentication.html">Authentication</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../extending/contributing.html">Contributing to CodeIgniter</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../libraries/official_packages.html">Official Packages</a></li>
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<li><a href="../index.html" class="icon icon-home"></a></li>
|
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<li class="breadcrumb-item"><a href="index.html">Working With Databases</a></li>
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||
<li class="breadcrumb-item active">Database Quick Start: Example Code</li>
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||
<li class="wy-breadcrumbs-aside">
|
||
</li>
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||
</ul>
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<hr/>
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</div>
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<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
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<div itemprop="articleBody">
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||
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<section id="database-quick-start-example-code">
|
||
<h1>Database Quick Start: Example Code<a class="headerlink" href="#database-quick-start-example-code" title="Permalink to this headline"></a></h1>
|
||
<p>The following page contains example code showing how the database class
|
||
is used. For complete details please read the individual pages
|
||
describing each function.</p>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">Note</p>
|
||
<p>CodeIgniter doesn’t support dots (<code class="docutils literal notranslate"><span class="pre">.</span></code>) in the database, table, and column names.</p>
|
||
</div>
|
||
<div class="contents local topic" id="contents">
|
||
<ul class="simple">
|
||
<li><p><a class="reference internal" href="#initializing-the-database-class" id="id1">Initializing the Database Class</a></p></li>
|
||
<li><p><a class="reference internal" href="#standard-query-with-multiple-results-object-version" id="id2">Standard Query With Multiple Results (Object Version)</a></p></li>
|
||
<li><p><a class="reference internal" href="#standard-query-with-multiple-results-array-version" id="id3">Standard Query With Multiple Results (Array Version)</a></p></li>
|
||
<li><p><a class="reference internal" href="#standard-query-with-single-result" id="id4">Standard Query With Single Result</a></p></li>
|
||
<li><p><a class="reference internal" href="#standard-query-with-single-result-array-version" id="id5">Standard Query With Single Result (Array version)</a></p></li>
|
||
<li><p><a class="reference internal" href="#standard-insert" id="id6">Standard Insert</a></p></li>
|
||
<li><p><a class="reference internal" href="#query-builder-query" id="id7">Query Builder Query</a></p></li>
|
||
<li><p><a class="reference internal" href="#query-builder-insert" id="id8">Query Builder Insert</a></p></li>
|
||
</ul>
|
||
</div>
|
||
<section id="initializing-the-database-class">
|
||
<h2><a class="toc-backref" href="#id1">Initializing the Database Class</a><a class="headerlink" href="#initializing-the-database-class" title="Permalink to this headline"></a></h2>
|
||
<p>The following code loads and initializes the database class based on
|
||
your <a class="reference internal" href="configuration.html"><span class="doc">configuration</span></a> settings:</p>
|
||
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
|
||
|
||
<span class="nv">$db</span> <span class="o">=</span> <span class="nx">\Config\Database</span><span class="o">::</span><span class="na">connect</span><span class="p">();</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>Once loaded the class is ready to be used as described below.</p>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">Note</p>
|
||
<p>If all your pages require database access you can connect
|
||
automatically. See the <a class="reference internal" href="connecting.html"><span class="doc">connecting</span></a> page for details.</p>
|
||
</div>
|
||
</section>
|
||
<section id="standard-query-with-multiple-results-object-version">
|
||
<h2><a class="toc-backref" href="#id2">Standard Query With Multiple Results (Object Version)</a><a class="headerlink" href="#standard-query-with-multiple-results-object-version" title="Permalink to this headline"></a></h2>
|
||
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
|
||
|
||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name, title, email FROM my_table'</span><span class="p">);</span>
|
||
<span class="nv">$results</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-></span><span class="na">getResult</span><span class="p">();</span>
|
||
|
||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$results</span> <span class="k">as</span> <span class="nv">$row</span><span class="p">)</span> <span class="p">{</span>
|
||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">title</span><span class="p">;</span>
|
||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">name</span><span class="p">;</span>
|
||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">email</span><span class="p">;</span>
|
||
<span class="p">}</span>
|
||
|
||
<span class="k">echo</span> <span class="s1">'Total Results: '</span> <span class="o">.</span> <span class="nb">count</span><span class="p">(</span><span class="nv">$results</span><span class="p">);</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="line-block">
|
||
<div class="line">The above <code class="docutils literal notranslate"><span class="pre">getResult()</span></code> function returns an array of <strong>objects</strong>.</div>
|
||
<div class="line">Example: <code class="docutils literal notranslate"><span class="pre">$row->title</span></code></div>
|
||
</div>
|
||
</section>
|
||
<section id="standard-query-with-multiple-results-array-version">
|
||
<h2><a class="toc-backref" href="#id3">Standard Query With Multiple Results (Array Version)</a><a class="headerlink" href="#standard-query-with-multiple-results-array-version" title="Permalink to this headline"></a></h2>
|
||
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
|
||
|
||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name, title, email FROM my_table'</span><span class="p">);</span>
|
||
<span class="nv">$results</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-></span><span class="na">getResultArray</span><span class="p">();</span>
|
||
|
||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$results</span> <span class="k">as</span> <span class="nv">$row</span><span class="p">)</span> <span class="p">{</span>
|
||
<span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'title'</span><span class="p">];</span>
|
||
<span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'name'</span><span class="p">];</span>
|
||
<span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'email'</span><span class="p">];</span>
|
||
<span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="line-block">
|
||
<div class="line">The above <code class="docutils literal notranslate"><span class="pre">getResultArray()</span></code> function returns an array of standard array
|
||
indexes.</div>
|
||
<div class="line">Example: <code class="docutils literal notranslate"><span class="pre">$row['title']</span></code></div>
|
||
</div>
|
||
</section>
|
||
<section id="standard-query-with-single-result">
|
||
<h2><a class="toc-backref" href="#id4">Standard Query With Single Result</a><a class="headerlink" href="#standard-query-with-single-result" title="Permalink to this headline"></a></h2>
|
||
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
|
||
|
||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name FROM my_table LIMIT 1'</span><span class="p">);</span>
|
||
<span class="nv">$row</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-></span><span class="na">getRow</span><span class="p">();</span>
|
||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">name</span><span class="p">;</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>The above <code class="docutils literal notranslate"><span class="pre">getRow()</span></code> function returns an <strong>object</strong>. Example: <code class="docutils literal notranslate"><span class="pre">$row->name</span></code></p>
|
||
</section>
|
||
<section id="standard-query-with-single-result-array-version">
|
||
<h2><a class="toc-backref" href="#id5">Standard Query With Single Result (Array version)</a><a class="headerlink" href="#standard-query-with-single-result-array-version" title="Permalink to this headline"></a></h2>
|
||
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
|
||
|
||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name FROM my_table LIMIT 1'</span><span class="p">);</span>
|
||
<span class="nv">$row</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-></span><span class="na">getRowArray</span><span class="p">();</span>
|
||
<span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'name'</span><span class="p">];</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>The above <code class="docutils literal notranslate"><span class="pre">getRowArray()</span></code> function returns an <strong>array</strong>. Example:
|
||
<code class="docutils literal notranslate"><span class="pre">$row['name']</span></code>.</p>
|
||
</section>
|
||
<section id="standard-insert">
|
||
<h2><a class="toc-backref" href="#id6">Standard Insert</a><a class="headerlink" href="#standard-insert" title="Permalink to this headline"></a></h2>
|
||
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
|
||
|
||
<span class="nv">$sql</span> <span class="o">=</span> <span class="s1">'INSERT INTO mytable (title, name) VALUES ('</span> <span class="o">.</span> <span class="nv">$db</span><span class="o">-></span><span class="na">escape</span><span class="p">(</span><span class="nv">$title</span><span class="p">)</span> <span class="o">.</span> <span class="s1">', '</span> <span class="o">.</span> <span class="nv">$db</span><span class="o">-></span><span class="na">escape</span><span class="p">(</span><span class="nv">$name</span><span class="p">)</span> <span class="o">.</span> <span class="s1">')'</span><span class="p">;</span>
|
||
<span class="nv">$db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="nv">$sql</span><span class="p">);</span>
|
||
<span class="k">echo</span> <span class="nv">$db</span><span class="o">-></span><span class="na">affectedRows</span><span class="p">();</span>
|
||
</pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="query-builder-query">
|
||
<h2><a class="toc-backref" href="#id7">Query Builder Query</a><a class="headerlink" href="#query-builder-query" title="Permalink to this headline"></a></h2>
|
||
<p>The <a class="reference internal" href="query_builder.html"><span class="doc">Query Builder Pattern</span></a> gives you a simplified
|
||
means of retrieving data:</p>
|
||
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
|
||
|
||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$db</span><span class="o">-></span><span class="na">table</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">)</span><span class="o">-></span><span class="na">get</span><span class="p">();</span>
|
||
|
||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$query</span><span class="o">-></span><span class="na">getResult</span><span class="p">()</span> <span class="k">as</span> <span class="nv">$row</span><span class="p">)</span> <span class="p">{</span>
|
||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">title</span><span class="p">;</span>
|
||
<span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>The above <code class="docutils literal notranslate"><span class="pre">get()</span></code> function retrieves all the results from the supplied
|
||
table. The <a class="reference internal" href="query_builder.html"><span class="doc">Query Builder</span></a> class contains a full
|
||
complement of functions for working with data.</p>
|
||
</section>
|
||
<section id="query-builder-insert">
|
||
<h2><a class="toc-backref" href="#id8">Query Builder Insert</a><a class="headerlink" href="#query-builder-insert" title="Permalink to this headline"></a></h2>
|
||
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span>
|
||
|
||
<span class="nv">$data</span> <span class="o">=</span> <span class="p">[</span>
|
||
<span class="s1">'title'</span> <span class="o">=></span> <span class="nv">$title</span><span class="p">,</span>
|
||
<span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span>
|
||
<span class="s1">'date'</span> <span class="o">=></span> <span class="nv">$date</span><span class="p">,</span>
|
||
<span class="p">];</span>
|
||
|
||
<span class="nv">$db</span><span class="o">-></span><span class="na">table</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">)</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="nv">$data</span><span class="p">);</span>
|
||
<span class="c1">// Produces: INSERT INTO mytable (title, name, date) VALUES ('{$title}', '{$name}', '{$date}')</span>
|
||
</pre></div>
|
||
</div>
|
||
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