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src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> </div> </ul> <hr/> </div> <div role="main" class="document"> <div class="section" id="custom-function-calls"> <h1>Custom Function Calls<a class="headerlink" href="#custom-function-calls" title="Permalink to this headline">¶</a></h1> <div class="section" id="this-db-call-function"> <h2>$this->db->call_function();<a class="headerlink" href="#this-db-call-function" title="Permalink to this headline">¶</a></h2> <p>This function enables you to call PHP database functions that are not natively included in CodeIgniter, in a platform independent manner. For example, let’s say you want to call the mysql_get_client_info() function, which is <strong>not</strong> natively supported by CodeIgniter. You could do so like this:</p> <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">call_function</span><span class="p">(</span><span class="s1">'get_client_info'</span><span class="p">);</span> </pre></div> </div> <p>You must supply the name of the function, <strong>without</strong> the mysql_ prefix, in the first parameter. The prefix is added automatically based on which database driver is currently being used. This permits you to run the same function on different database platforms. Obviously not all function calls are identical between platforms, so there are limits to how useful this function can be in terms of portability.</p> <p>Any parameters needed by the function you are calling will be added to the second parameter.</p> <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">call_function</span><span class="p">(</span><span class="s1">'some_function'</span><span class="p">,</span> <span class="nv">$param1</span><span class="p">,</span> <span class="nv">$param2</span><span class="p">,</span> <span class="nx">etc</span><span class="o">..</span><span class="p">);</span> </pre></div> </div> <p>Often, you will either need to supply a database connection ID or a database result ID. The connection ID can be accessed using:</p> <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">conn_id</span><span class="p">;</span> </pre></div> </div> <p>The result ID can be accessed from within your result object, like this:</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">query</span><span class="p">(</span><span class="s2">"SOME QUERY"</span><span class="p">);</span> <span class="nv">$query</span><span class="o">-></span><span class="na">result_id</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="caching.html" class="btn btn-neutral float-right" title="Database Caching Class">Next <span class="fa fa-arrow-circle-right"></span></a> <a href="metadata.html" class="btn btn-neutral" title="Database Metadata"><span class="fa fa-arrow-circle-left"></span> Previous</a> </div> <hr/> <div role="contentinfo"> <p> © Copyright 2014 - 2019, British Columbia Institute of Technology. Last updated on Sep 19, 2019. </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:'3.1.11', 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>