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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">General Topics</a> »</li> <li>Handling Multiple Environments</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="handling-multiple-environments"> <h1>Handling Multiple Environments<a class="headerlink" href="#handling-multiple-environments" title="Permalink to this headline">¶</a></h1> <p>Developers often desire different system behavior depending on whether an application is running in a development or production environment. For example, verbose error output is something that would be useful while developing an application, but it may also pose a security issue when “live”.</p> <div class="section" id="the-environment-constant"> <h2>The ENVIRONMENT Constant<a class="headerlink" href="#the-environment-constant" title="Permalink to this headline">¶</a></h2> <p>By default, CodeIgniter comes with the environment constant set to use the value provided in <tt class="docutils literal"><span class="pre">$_SERVER['CI_ENV']</span></tt>, otherwise defaults to ‘development’. At the top of index.php, you will see:</p> <div class="highlight-ci"><div class="highlight"><pre><span class="nb">define</span><span class="p">(</span><span class="s1">'ENVIRONMENT'</span><span class="p">,</span> <span class="nb">isset</span><span class="p">(</span><span class="nv">$_SERVER</span><span class="p">[</span><span class="s1">'CI_ENV'</span><span class="p">])</span> <span class="o">?</span> <span class="nv">$_SERVER</span><span class="p">[</span><span class="s1">'CI_ENV'</span><span class="p">]</span> <span class="o">:</span> <span class="s1">'development'</span><span class="p">);</span> </pre></div> </div> <p>This server variable can be set in your .htaccess file, or Apache config using <a class="reference external" href="https://httpd.apache.org/docs/2.2/mod/mod_env.html#setenv">SetEnv</a>. Alternative methods are available for nginx and other servers, or you can remove this logic entirely and set the constant based on the server’s IP address.</p> <p>In addition to affecting some basic framework behavior (see the next section), you may use this constant in your own development to differentiate between which environment you are running in.</p> </div> <div class="section" id="effects-on-default-framework-behavior"> <h2>Effects On Default Framework Behavior<a class="headerlink" href="#effects-on-default-framework-behavior" title="Permalink to this headline">¶</a></h2> <p>There are some places in the CodeIgniter system where the ENVIRONMENT constant is used. This section describes how default framework behavior is affected.</p> <div class="section" id="error-reporting"> <h3>Error Reporting<a class="headerlink" href="#error-reporting" title="Permalink to this headline">¶</a></h3> <p>Setting the ENVIRONMENT constant to a value of ‘development’ will cause all PHP errors to be rendered to the browser when they occur. Conversely, setting the constant to ‘production’ will disable all error output. Disabling error reporting in production is a <a class="reference internal" href="security.html"><em>good security practice</em></a>.</p> </div> <div class="section" id="configuration-files"> <h3>Configuration Files<a class="headerlink" href="#configuration-files" title="Permalink to this headline">¶</a></h3> <p>Optionally, you can have CodeIgniter load environment-specific configuration files. This may be useful for managing things like differing API keys across multiple environments. This is described in more detail in the environment section of the <a class="reference internal" href="../libraries/config.html"><em>Config Class</em></a> documentation.</p> </div> </div> </div> </div> <footer> <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> <a href="alternative_php.html" class="btn btn-neutral float-right" title="Alternate PHP Syntax for View Files">Next <span class="fa fa-arrow-circle-right"></span></a> <a href="managing_apps.html" class="btn btn-neutral" title="Managing your Applications"><span class="fa fa-arrow-circle-left"></span> Previous</a> </div> <hr/> <div role="contentinfo"> <p> © Copyright 2014 - 2016, British Columbia Institute of Technology. Last updated on Mar 21, 2016. </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:'3.0.6', 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>