PageRenderTime 37ms CodeModel.GetById 12ms app.highlight 18ms RepoModel.GetById 1ms app.codeStats 0ms

/user_guide/overview/appflow.html

Relevant Search: With Applications for Solr and Elasticsearch

For more in depth reading about search, ranking and generally everything you could ever want to know about how lucene, elasticsearch or solr work under the hood I highly suggest this book. Easily one of the most interesting technical books I have read in a long time. If you are tasked with solving search relevance problems even if not in Solr or Elasticsearch it should be your first reference. Amazon Affiliate Link
https://bitbucket.org/bo_hmb/bo_hmb
HTML | 513 lines | 426 code | 86 blank | 1 comment | 0 complexity | 3e754a4c5689fbfe603491930576111e MD5 | raw file
  1
  2
  3<!DOCTYPE html>
  4<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
  5<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
  6<head>
  7  <meta charset="utf-8">
  8  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  9  
 10  <title>Application Flow Chart &mdash; CodeIgniter 3.1.8 documentation</title>
 11  
 12
 13  
 14  
 15    <link rel="shortcut icon" href="../_static/ci-icon.ico"/>
 16  
 17
 18  
 19  <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'>
 20
 21  
 22  
 23    
 24
 25  
 26
 27  
 28  
 29    <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" />
 30  
 31
 32  
 33        <link rel="index" title="Index"
 34              href="../genindex.html"/>
 35        <link rel="search" title="Search" href="../search.html"/>
 36    <link rel="top" title="CodeIgniter 3.1.8 documentation" href="../index.html"/>
 37        <link rel="up" title="CodeIgniter Overview" href="index.html"/>
 38        <link rel="next" title="Model-View-Controller" href="mvc.html"/>
 39        <link rel="prev" title="CodeIgniter Features" href="features.html"/> 
 40
 41  
 42  <script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
 43
 44</head>
 45
 46<body class="wy-body-for-nav" role="document">
 47
 48  <div id="nav">
 49  <div id="nav_inner">
 50    
 51    
 52    
 53      <div id="pulldown-menu" class="ciNav">
 54        <ul>
 55<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
 56</ul>
 57<ul>
 58<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
 59<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
 60<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
 61<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
 62<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
 63</ul>
 64</li>
 65</ul>
 66<ul class="current">
 67<li class="toctree-l1 current"><a class="reference internal" href="index.html">CodeIgniter Overview</a><ul class="current">
 68<li class="toctree-l2"><a class="reference internal" href="getting_started.html">Getting Started</a></li>
 69<li class="toctree-l2"><a class="reference internal" href="at_a_glance.html">CodeIgniter at a Glance</a></li>
 70<li class="toctree-l2"><a class="reference internal" href="features.html">Supported Features</a></li>
 71<li class="toctree-l2 current"><a class="current reference internal" href="#">Application Flow Chart</a></li>
 72<li class="toctree-l2"><a class="reference internal" href="mvc.html">Model-View-Controller</a></li>
 73<li class="toctree-l2"><a class="reference internal" href="goals.html">Architectural Goals</a></li>
 74</ul>
 75</li>
 76</ul>
 77<ul>
 78<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
 79<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
 80<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
 81<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
 82<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
 83</ul>
 84</li>
 85</ul>
 86<ul>
 87<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
 88<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
 89<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
 90</ul>
 91</li>
 92</ul>
 93<ul>
 94<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
 95<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
 96<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
 97<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
 98<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
 99<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
100<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
101<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
102<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
103<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
104<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
105<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
106<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
107<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
108<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
109<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
110<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
111<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
112<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
113<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
114<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
115<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
116<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
117<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
118<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
119<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
120<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
121</ul>
122</li>
123</ul>
124<ul>
125<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
126<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
127<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
128<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
129<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
130<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
131<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
132<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
133<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
134<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
135<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
136<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
137<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
138<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
139<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
140<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
141<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
142<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
143<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
144<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
145<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
146<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
147<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
148<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
149<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
150<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
151<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
152<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
153<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
154<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
155<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
156</ul>
157</li>
158</ul>
159<ul>
160<li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
161<li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li>
162<li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li>
163<li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li>
164<li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
165<li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
166<li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
167<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
168<li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
169<li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
170<li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li>
171<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
172<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
173<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
174<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
175</ul>
176</li>
177</ul>
178<ul>
179<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
180<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
181<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
182<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
183<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
184<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
185<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
186<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
187<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
188<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
189<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
190<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
191<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
192<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
193<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
194<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
195<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
196<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
197<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
198<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
199<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
200<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
201</ul>
202</li>
203</ul>
204
205      </div>
206    
207      
208  </div>
209</div>
210<div id="nav2">
211  <a href="#" id="openToc">
212    <img src="data:image/jpeg;base64,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" title="Toggle Table of Contents" alt="Toggle Table of Contents" />
213  </a>
214</div>
215
216  <div class="wy-grid-for-nav">
217
218    
219    <nav data-toggle="wy-nav-shift" class="wy-nav-side">
220      <div class="wy-side-nav-search">
221        
222          <a href="../index.html" class="fa fa-home"> CodeIgniter</a>
223        
224        
225<div role="search">
226  <form id="rtd-search-form" class="wy-form" action="../search.html" method="get">
227    <input type="text" name="q" placeholder="Search docs" />
228    <input type="hidden" name="check_keywords" value="yes" />
229    <input type="hidden" name="area" value="default" />
230  </form>
231</div>
232      </div>
233
234      <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
235        
236          
237          
238              <ul>
239<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
240</ul>
241<ul>
242<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
243<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
244<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
245<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
246<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
247</ul>
248</li>
249</ul>
250<ul class="current">
251<li class="toctree-l1 current"><a class="reference internal" href="index.html">CodeIgniter Overview</a><ul class="current">
252<li class="toctree-l2"><a class="reference internal" href="getting_started.html">Getting Started</a></li>
253<li class="toctree-l2"><a class="reference internal" href="at_a_glance.html">CodeIgniter at a Glance</a></li>
254<li class="toctree-l2"><a class="reference internal" href="features.html">Supported Features</a></li>
255<li class="toctree-l2 current"><a class="current reference internal" href="#">Application Flow Chart</a></li>
256<li class="toctree-l2"><a class="reference internal" href="mvc.html">Model-View-Controller</a></li>
257<li class="toctree-l2"><a class="reference internal" href="goals.html">Architectural Goals</a></li>
258</ul>
259</li>
260</ul>
261<ul>
262<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
263<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
264<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
265<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
266<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
267</ul>
268</li>
269</ul>
270<ul>
271<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
272<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
273<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
274</ul>
275</li>
276</ul>
277<ul>
278<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
279<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
280<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
281<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
282<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
283<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
284<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
285<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
286<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
287<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
288<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
289<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
290<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
291<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
292<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
293<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
294<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
295<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
296<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
297<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
298<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
299<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
300<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
301<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
302<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
303<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
304<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
305</ul>
306</li>
307</ul>
308<ul>
309<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
310<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
311<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
312<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
313<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
314<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
315<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
316<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
317<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
318<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
319<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
320<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
321<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
322<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
323<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
324<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
325<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
326<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
327<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
328<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
329<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
330<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
331<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
332<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
333<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
334<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
335<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
336<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
337<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
338<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
339<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
340</ul>
341</li>
342</ul>
343<ul>
344<li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
345<li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li>
346<li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li>
347<li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li>
348<li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
349<li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
350<li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
351<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
352<li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
353<li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
354<li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li>
355<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
356<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
357<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
358<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
359</ul>
360</li>
361</ul>
362<ul>
363<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
364<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
365<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
366<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
367<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
368<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
369<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
370<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
371<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
372<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
373<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
374<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
375<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
376<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
377<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
378<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
379<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
380<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
381<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
382<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
383<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
384<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
385</ul>
386</li>
387</ul>
388
389          
390        
391      </div>
392      &nbsp;
393    </nav>
394
395    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
396
397      
398      <nav class="wy-nav-top" role="navigation" aria-label="top navigation">
399        <i data-toggle="wy-nav-top" class="fa fa-bars"></i>
400        <a href="../index.html">CodeIgniter</a>
401      </nav>
402
403
404      
405      <div class="wy-nav-content">
406        <div class="rst-content">
407          <div role="navigation" aria-label="breadcrumbs navigation">
408  <ul class="wy-breadcrumbs">
409    <li><a href="../index.html">Docs</a> &raquo;</li>
410      
411        <li><a href="index.html">CodeIgniter Overview</a> &raquo;</li>
412      
413    <li>Application Flow Chart</li>
414    <li class="wy-breadcrumbs-aside">
415      
416    </li>
417    <div style="float:right;margin-left:5px;" id="closeMe">
418      <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
419    </div>
420  </ul>
421  <hr/>
422</div>
423          <div role="main" class="document">
424            
425  <div class="section" id="application-flow-chart">
426<h1>Application Flow Chart<a class="headerlink" href="#application-flow-chart" title="Permalink to this headline"></a></h1>
427<p>The following graphic illustrates how data flows throughout the system:</p>
428<p><img alt="CodeIgniter application flow" src="../_images/appflowchart.gif" /></p>
429<ol class="arabic simple">
430<li>The index.php serves as the front controller, initializing the base
431resources needed to run CodeIgniter.</li>
432<li>The Router examines the HTTP request to determine what should be done
433with it.</li>
434<li>If a cache file exists, it is sent directly to the browser, bypassing
435the normal system execution.</li>
436<li>Security. Before the application controller is loaded, the HTTP
437request and any user submitted data is filtered for security.</li>
438<li>The Controller loads the model, core libraries, helpers, and any
439other resources needed to process the specific request.</li>
440<li>The finalized View is rendered then sent to the web browser to be
441seen. If caching is enabled, the view is cached first so that on
442subsequent requests it can be served.</li>
443</ol>
444</div>
445
446
447          </div>
448          <footer>
449  
450    <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
451      
452        <a href="mvc.html" class="btn btn-neutral float-right" title="Model-View-Controller">Next <span class="fa fa-arrow-circle-right"></span></a>
453      
454      
455        <a href="features.html" class="btn btn-neutral" title="CodeIgniter Features"><span class="fa fa-arrow-circle-left"></span> Previous</a>
456      
457    </div>
458  
459
460  <hr/>
461
462  <div role="contentinfo">
463    <p>
464        &copy; Copyright 2014 - 2018, British Columbia Institute of Technology.
465      Last updated on Mar 22, 2018.
466    </p>
467  </div>
468
469  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>.
470  
471</footer>
472        </div>
473      </div>
474
475    </section>
476
477  </div>
478  
479
480
481  
482
483    <script type="text/javascript">
484        var DOCUMENTATION_OPTIONS = {
485            URL_ROOT:'../',
486            VERSION:'3.1.8',
487            COLLAPSE_INDEX:false,
488            FILE_SUFFIX:'.html',
489            HAS_SOURCE:  false
490        };
491    </script>
492      <script type="text/javascript" src="../_static/jquery.js"></script>
493      <script type="text/javascript" src="../_static/underscore.js"></script>
494      <script type="text/javascript" src="../_static/doctools.js"></script>
495
496  
497
498  
499  
500    <script type="text/javascript" src="../_static/js/theme.js"></script>
501  
502
503  
504  
505  <script type="text/javascript">
506      jQuery(function () {
507          SphinxRtdTheme.StickyNav.enable();
508      });
509  </script>
510   
511
512</body>
513</html>