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| author | Andrey Andreev <narf@devilix.net> | 2018-03-22 15:48:55 +0100 |
|---|---|---|
| committer | Andrey Andreev <narf@devilix.net> | 2018-03-22 15:48:55 +0100 |
| commit | 71e647782764184e3aab4faffe6d99176758979f (patch) | |
| tree | 74dbdd50a61cd5674915c144aca9ebbc00b235b8 /user_guide/database/examples.html | |
| parent | b12fbad77bd69ca0c7624a9094c29b7691ea6107 (diff) | |
[ci skip] 3.1.8 release
Diffstat (limited to 'user_guide/database/examples.html')
| -rw-r--r-- | user_guide/database/examples.html | 597 |
1 files changed, 597 insertions, 0 deletions
diff --git a/user_guide/database/examples.html b/user_guide/database/examples.html new file mode 100644 index 000000000..70c762329 --- /dev/null +++ b/user_guide/database/examples.html @@ -0,0 +1,597 @@ + + +<!DOCTYPE html> +<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> +<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + + <title>Database Quick Start: Example Code — CodeIgniter 3.1.8 documentation</title> + + + + + <link rel="shortcut icon" href="../_static/ci-icon.ico"/> + + + + <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'> + + + + + + + + + + <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> + + + + <link rel="index" title="Index" + href="../genindex.html"/> + <link rel="search" 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href="../libraries/security.html">Security Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li> +<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li> +<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li> +</ul> +</li> +</ul> +<ul class="current"> +<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current"> +<li class="toctree-l2 current"><a class="current reference internal" href="#">Quick Start: Usage Examples</a></li> +<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li> +<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li> +<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li> +<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li> +<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li> +<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li> +<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li> +<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li> +<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li> +<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li> +<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li> +</ul> +</li> +</ul> +<ul> +<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li> +</ul> +</li> +</ul> + + + + </div> + + </nav> + + <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> + + + <nav class="wy-nav-top" role="navigation" aria-label="top navigation"> + <i data-toggle="wy-nav-top" class="fa fa-bars"></i> + <a href="../index.html">CodeIgniter</a> + </nav> + + + + <div class="wy-nav-content"> + <div class="rst-content"> + <div role="navigation" aria-label="breadcrumbs navigation"> + <ul class="wy-breadcrumbs"> + <li><a href="../index.html">Docs</a> »</li> + + <li><a href="index.html">Database Reference</a> »</li> + + <li>Database Quick Start: Example Code</li> + <li class="wy-breadcrumbs-aside"> + + </li> + <div style="float:right;margin-left:5px;" id="closeMe"> + <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> + </div> + </ul> + <hr/> +</div> + <div role="main" class="document"> + + <div class="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="section" id="initializing-the-database-class"> +<h2>Initializing the Database Class<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-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">();</span> +</pre></div> +</div> +<p>Once loaded the class is ready to be used as described below.</p> +<p>Note: If all your pages require database access you can connect +automatically. See the <a class="reference internal" href="connecting.html"><span class="doc">connecting</span></a> page for details.</p> +</div> +<div class="section" id="standard-query-with-multiple-results-object-version"> +<h2>Standard Query With Multiple Results (Object Version)<a class="headerlink" href="#standard-query-with-multiple-results-object-version" title="Permalink to this headline">¶</a></h2> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name, title, email FROM my_table'</span><span class="p">);</span> + +<span class="k">foreach</span> <span class="p">(</span><span class="nv">$query</span><span class="o">-></span><span class="na">result</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="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="nv">$query</span><span class="o">-></span><span class="na">num_rows</span><span class="p">();</span> +</pre></div> +</div> +<p>The above result() function returns an array of <strong>objects</strong>. Example: +$row->title</p> +</div> +<div class="section" id="standard-query-with-multiple-results-array-version"> +<h2>Standard Query With Multiple Results (Array Version)<a class="headerlink" href="#standard-query-with-multiple-results-array-version" title="Permalink to this headline">¶</a></h2> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">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="k">foreach</span> <span class="p">(</span><span class="nv">$query</span><span class="o">-></span><span class="na">result_array</span><span class="p">()</span> <span class="k">as</span> <span class="nv">$row</span><span class="p">)</span> +<span class="p">{</span> + <span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'title'</span><span class="p">];</span> + <span class="k">echo</span> <span class="nv">$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> +<p>The above result_array() function returns an array of standard array +indexes. Example: $row[‘title’]</p> +</div> +<div class="section" id="standard-query-with-single-result"> +<h2>Standard Query With Single Result<a class="headerlink" href="#standard-query-with-single-result" title="Permalink to this headline">¶</a></h2> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name FROM my_table LIMIT 1'</span><span class="p">);</span> +<span class="nv">$row</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-></span><span class="na">row</span><span class="p">();</span> +<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">name</span><span class="p">;</span> +</pre></div> +</div> +<p>The above row() function returns an <strong>object</strong>. Example: $row->name</p> +</div> +<div class="section" id="standard-query-with-single-result-array-version"> +<h2>Standard Query With Single Result (Array version)<a class="headerlink" href="#standard-query-with-single-result-array-version" title="Permalink to this headline">¶</a></h2> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name FROM my_table LIMIT 1'</span><span class="p">);</span> +<span class="nv">$row</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-></span><span class="na">row_array</span><span class="p">();</span> +<span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'name'</span><span class="p">];</span> +</pre></div> +</div> +<p>The above row_array() function returns an <strong>array</strong>. Example: +$row[‘name’]</p> +</div> +<div class="section" id="standard-insert"> +<h2>Standard Insert<a class="headerlink" href="#standard-insert" title="Permalink to this headline">¶</a></h2> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$sql</span> <span class="o">=</span> <span class="s2">"INSERT INTO mytable (title, name) VALUES ("</span><span class="o">.</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">escape</span><span class="p">(</span><span class="nv">$title</span><span class="p">)</span><span class="o">.</span><span class="s2">", "</span><span class="o">.</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">escape</span><span class="p">(</span><span class="nv">$name</span><span class="p">)</span><span class="o">.</span><span class="s2">")"</span><span class="p">;</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="nv">$sql</span><span class="p">);</span> +<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">affected_rows</span><span class="p">();</span> +</pre></div> +</div> +</div> +<div class="section" id="query-builder-query"> +<h2>Query Builder Query<a class="headerlink" href="#query-builder-query" title="Permalink to this headline">¶</a></h2> +<p>The <a class="reference internal" href="query_builder.html"><span class="doc">Query Builder Pattern</span></a> gives you a simplified +means of retrieving data:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">);</span> + +<span class="k">foreach</span> <span class="p">(</span><span class="nv">$query</span><span class="o">-></span><span class="na">result</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 get() 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 +compliment of functions for working with data.</p> +</div> +<div class="section" id="query-builder-insert"> +<h2>Query Builder Insert<a class="headerlink" href="#query-builder-insert" title="Permalink to this headline">¶</a></h2> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="nv">$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="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> <span class="c1">// Produces: INSERT INTO mytable (title, name, date) VALUES ('{$title}', '{$name}', '{$date}')</span> +</pre></div> +</div> +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="configuration.html" class="btn btn-neutral float-right" title="Database Configuration">Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="index.html" class="btn btn-neutral" title="Database Reference"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014 - 2018, British Columbia Institute of Technology. + Last updated on Mar 22, 2018. + </p> + </div> + + Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. + +</footer> + </div> + </div> + + </section> + + </div> + + + + + + <script type="text/javascript"> + var DOCUMENTATION_OPTIONS = { + URL_ROOT:'../', + VERSION:'3.1.8', + COLLAPSE_INDEX:false, + FILE_SUFFIX:'.html', + HAS_SOURCE: false + }; + </script> + <script type="text/javascript" src="../_static/jquery.js"></script> + <script type="text/javascript" src="../_static/underscore.js"></script> + <script type="text/javascript" src="../_static/doctools.js"></script> + + + + + + <script type="text/javascript" src="../_static/js/theme.js"></script> + + + + + <script type="text/javascript"> + jQuery(function () { + SphinxRtdTheme.StickyNav.enable(); + }); + </script> + + +</body> +</html>
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