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Derek Allard404e35d2007-08-07 01:00:45 +0000[diff] [blame]5<title>CodeIgniter User Guide : Design and Architectural Goals</title>
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Derek Allard3d879d52008-01-18 19:41:32 +0000[diff] [blame]19<meta name='author' content='ExpressionEngine Dev Team' />
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Derek Allard197d10b2008-02-12 04:20:38 +0000[diff] [blame]31<td><h1>CodeIgniter User Guide Version 1.6.1</h1></td>
adminc0d5d522006-10-30 19:40:35 +0000[diff] [blame]32<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
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Derek Jones7a9193a2008-01-21 18:39:20 +0000[diff] [blame]43<a href="http://codeigniter.com/">CodeIgniter Home</a> &nbsp;&#8250;&nbsp;
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]44<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
45Goals
46</td>
Derek Allardbc030912007-06-24 18:25:29 +0000[diff] [blame]47<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide&nbsp; <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" />&nbsp;<input type="submit" class="submit" name="sa" value="Go" /></form></td>
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60<h2>Design and Architectural Goals</h2>
61
Derek Allardd2df9bc2007-04-15 17:41:17 +0000[diff] [blame]62<p>Our goal for CodeIgniter is <dfn>maximum performance, capability, and flexibility in the smallest, lightest possible package</dfn>.</p>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]63
admine334c472006-10-21 19:44:22 +0000[diff] [blame]64<p>To meet this goal we are committed to benchmarking, re-factoring, and simplifying at every step of the development process,
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]65rejecting anything that doesn't further the stated objective.</p>
66
Rick Ellis47d78922008-04-11 19:49:42 +0000[diff] [blame^]67<p>From a technical and architectural standpoint, CodeIgniter was created with the following objectives:</p>
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69<ul>
Derek Allardd2df9bc2007-04-15 17:41:17 +0000[diff] [blame]70<li><strong>Dynamic Instantiation.</strong> In CodeIgniter, components are loaded and routines executed only when requested, rather than globally. No assumptions are made by the system regarding what may be needed beyond the minimal core resources, so the system is very light-weight by default. The events, as triggered by the HTTP request, and the controllers and views you design will determine what is invoked.</li>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]71<li><strong>Loose Coupling.</strong> Coupling is the degree to which components of a system rely on each other. The less components depend on each other the more reusable and flexible the system becomes. Our goal was a very loosely coupled system.</li>
Derek Allardd2df9bc2007-04-15 17:41:17 +0000[diff] [blame]72<li><strong>Component Singularity.</strong> Singularity is the degree to which components have a narrowly focused purpose. In CodeIgniter, each class and its functions are highly autonomous in order to allow maximum usefulness.</li>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]73</ul>
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Derek Allardd2df9bc2007-04-15 17:41:17 +0000[diff] [blame]75<p>CodeIgniter is a dynamically instantiated, loosely coupled system with high component singularity. It strives for simplicity, flexibility, and high performance in a small footprint package.</p>
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Derek Allardc6441282007-07-04 23:54:32 +0000[diff] [blame]93</p>
Derek Jones07870432008-02-13 03:49:26 +0000[diff] [blame]94<p><a href="http://codeigniter.com">CodeIgniter</a> &nbsp;&middot;&nbsp; Copyright &#169; 2006-2008 &nbsp;&middot;&nbsp; <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
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