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diff --git a/user_guide/database/connecting.html b/user_guide/database/connecting.html deleted file mode 100644 index af67d5f58..000000000 --- a/user_guide/database/connecting.html +++ /dev/null @@ -1,641 +0,0 @@ - - -<!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>Connecting to your Database — CodeIgniter 3.1.7 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 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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="connecting-to-your-database"> -<h1>Connecting to your Database<a class="headerlink" href="#connecting-to-your-database" title="Permalink to this headline">¶</a></h1> -<p>There are two ways to connect to a database:</p> -<div class="section" id="automatically-connecting"> -<h2>Automatically Connecting<a class="headerlink" href="#automatically-connecting" title="Permalink to this headline">¶</a></h2> -<p>The “auto connect” feature will load and instantiate the database class -with every page load. To enable “auto connecting”, add the word database -to the library array, as indicated in the following file:</p> -<p>application/config/autoload.php</p> -</div> -<div class="section" id="manually-connecting"> -<h2>Manually Connecting<a class="headerlink" href="#manually-connecting" title="Permalink to this headline">¶</a></h2> -<p>If only some of your pages require database connectivity you can -manually connect to your database by adding this line of code in any -function where it is needed, or in your class constructor to make the -database available globally in that class.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">();</span> -</pre></div> -</div> -<p>If the above function does <strong>not</strong> contain any information in the first -parameter it will connect to the group specified in your database config -file. For most people, this is the preferred method of use.</p> -<div class="section" id="available-parameters"> -<h3>Available Parameters<a class="headerlink" href="#available-parameters" title="Permalink to this headline">¶</a></h3> -<ol class="arabic simple"> -<li>The database connection values, passed either as an array or a DSN -string.</li> -<li>TRUE/FALSE (boolean). Whether to return the connection ID (see -Connecting to Multiple Databases below).</li> -<li>TRUE/FALSE (boolean). Whether to enable the Query Builder class. Set -to TRUE by default.</li> -</ol> -</div> -<div class="section" id="manually-connecting-to-a-database"> -<h3>Manually Connecting to a Database<a class="headerlink" href="#manually-connecting-to-a-database" title="Permalink to this headline">¶</a></h3> -<p>The first parameter of this function can <strong>optionally</strong> be used to -specify a particular database group from your config file, or you can -even submit connection values for a database that is not specified in -your config file. Examples:</p> -<p>To choose a specific group from your config file you can do this:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="s1">'group_name'</span><span class="p">);</span> -</pre></div> -</div> -<p>Where group_name is the name of the connection group from your config -file.</p> -<p>To connect manually to a desired database you can pass an array of -values:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span><span class="p">[</span><span class="s1">'hostname'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'localhost'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'username'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'myusername'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'password'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'mypassword'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'database'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'mydatabase'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'dbdriver'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'mysqli'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'dbprefix'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">''</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'pconnect'</span><span class="p">]</span> <span class="o">=</span> <span class="k">FALSE</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'db_debug'</span><span class="p">]</span> <span class="o">=</span> <span class="k">TRUE</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'cache_on'</span><span class="p">]</span> <span class="o">=</span> <span class="k">FALSE</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'cachedir'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">''</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'char_set'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'utf8'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'dbcollat'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'utf8_general_ci'</span><span class="p">;</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="nv">$config</span><span class="p">);</span> -</pre></div> -</div> -<p>For information on each of these values please see the <a class="reference internal" href="configuration.html"><span class="doc">configuration -page</span></a>.</p> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p>For the PDO driver, you should use the $config[‘dsn’] setting -instead of ‘hostname’ and ‘database’:</p> -<div class="last line-block"> -<div class="line"><br /></div> -<div class="line">$config[‘dsn’] = ‘mysql:host=localhost;dbname=mydatabase’;</div> -</div> -</div> -<p>Or you can submit your database values as a Data Source Name. DSNs must -have this prototype:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$dsn</span> <span class="o">=</span> <span class="s1">'dbdriver://username:password@hostname/database'</span><span class="p">;</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="nv">$dsn</span><span class="p">);</span> -</pre></div> -</div> -<p>To override default config values when connecting with a DSN string, add -the config variables as a query string.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$dsn</span> <span class="o">=</span> <span class="s1">'dbdriver://username:password@hostname/database?char_set=utf8&dbcollat=utf8_general_ci&cache_on=true&cachedir=/path/to/cache'</span><span class="p">;</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="nv">$dsn</span><span class="p">);</span> -</pre></div> -</div> -</div> -</div> -<div class="section" id="connecting-to-multiple-databases"> -<h2>Connecting to Multiple Databases<a class="headerlink" href="#connecting-to-multiple-databases" title="Permalink to this headline">¶</a></h2> -<p>If you need to connect to more than one database simultaneously you can -do so as follows:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$DB1</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="s1">'group_one'</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> -<span class="nv">$DB2</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="s1">'group_two'</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> -</pre></div> -</div> -<p>Note: Change the words “group_one” and “group_two” to the specific -group names you are connecting to (or you can pass the connection values -as indicated above).</p> -<p>By setting the second parameter to TRUE (boolean) the function will -return the database object.</p> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p>When you connect this way, you will use your object name to issue -commands rather than the syntax used throughout this guide. In other -words, rather than issuing commands with:</p> -<div class="last line-block"> -<div class="line"><br /></div> -<div class="line">$this->db->query();</div> -<div class="line">$this->db->result();</div> -<div class="line">etc…</div> -<div class="line"><br /></div> -<div class="line">You will instead use:</div> -<div class="line"><br /></div> -<div class="line">$DB1->query();</div> -<div class="line">$DB1->result();</div> -<div class="line">etc…</div> -</div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p>You don’t need to create separate database configurations if you -only need to use a different database on the same connection. You -can switch to a different database when you need to, like this:</p> -<div class="last line-block"> -<div class="line">$this->db->db_select($database2_name);</div> -</div> -</div> -</div> -<div class="section" id="reconnecting-keeping-the-connection-alive"> -<h2>Reconnecting / Keeping the Connection Alive<a class="headerlink" href="#reconnecting-keeping-the-connection-alive" title="Permalink to this headline">¶</a></h2> -<p>If the database server’s idle timeout is exceeded while you’re doing -some heavy PHP lifting (processing an image, for instance), you should -consider pinging the server by using the reconnect() method before -sending further queries, which can gracefully keep the connection alive -or re-establish it.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">reconnect</span><span class="p">();</span> -</pre></div> -</div> -</div> -<div class="section" id="manually-closing-the-connection"> -<h2>Manually closing the Connection<a class="headerlink" href="#manually-closing-the-connection" title="Permalink to this headline">¶</a></h2> -<p>While CodeIgniter intelligently takes care of closing your database -connections, you can explicitly close the connection.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">close</span><span class="p">();</span> -</pre></div> -</div> -</div> -</div> - - - </div> - <footer> - - <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> - - <a href="queries.html" class="btn btn-neutral float-right" title="Queries">Next <span class="fa fa-arrow-circle-right"></span></a> - - - <a href="configuration.html" class="btn btn-neutral" title="Database Configuration"><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 Jan 13, 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:'3.1.7', - 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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