diff options
Diffstat (limited to 'user_guide/libraries/input.html')
| -rw-r--r-- | user_guide/libraries/input.html | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/user_guide/libraries/input.html b/user_guide/libraries/input.html deleted file mode 100644 index 38f2d5cbc..000000000 --- a/user_guide/libraries/input.html +++ /dev/null @@ -1,295 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> -<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> -<head> - -<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> -<title>Input Class : CodeIgniter User Guide</title> - -<style type='text/css' media='all'>@import url('../userguide.css');</style> -<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' /> - -<script type="text/javascript" src="../nav/nav.js"></script> -<script type="text/javascript" src="../nav/prototype.lite.js"></script> -<script type="text/javascript" src="../nav/moo.fx.js"></script> -<script type="text/javascript" src="../nav/user_guide_menu.js"></script> - -<meta http-equiv='expires' content='-1' /> -<meta http-equiv= 'pragma' content='no-cache' /> -<meta name='robots' content='all' /> -<meta name='author' content='ExpressionEngine Dev Team' /> -<meta name='description' content='CodeIgniter User Guide' /> - -</head> -<body> - -<!-- START NAVIGATION --> -<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div> -<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div> -<div id="masthead"> -<table cellpadding="0" cellspacing="0" border="0" style="width:100%"> -<tr> -<td><h1>CodeIgniter User Guide Version 2.1.2</h1></td> -<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td> -</tr> -</table> -</div> -<!-- END NAVIGATION --> - - -<!-- START BREADCRUMB --> -<table cellpadding="0" cellspacing="0" border="0" style="width:100%"> -<tr> -<td id="breadcrumb"> -<a href="http://codeigniter.com/">CodeIgniter Home</a> › -<a href="../index.html">User Guide Home</a> › -Input Class -</td> -<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 <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td> -</tr> -</table> -<!-- END BREADCRUMB --> - -<br clear="all" /> - - -<!-- START CONTENT --> -<div id="content"> - - -<h1>Input Class</h1> - -<p>The Input Class serves two purposes:</p> - -<ol> -<li>It pre-processes global input data for security.</li> -<li>It provides some helper functions for fetching input data and pre-processing it.</li> -</ol> - -<p class="important"><strong>Note:</strong> This class is initialized automatically by the system so there is no need to do it manually.</p> - - -<h2>Security Filtering</h2> - -<p>The security filtering function is called automatically when a new <a href="../general/controllers.html">controller</a> is invoked. It does the following:</p> - -<ul> -<li>If $config['allow_get_array'] is FALSE(default is TRUE), destroys the global GET array.</li> -<li>Destroys all global variables in the event register_globals is turned on.</li> -<li>Filters the GET/POST/COOKIE array keys, permitting only alpha-numeric (and a few other) characters.</li> -<li>Provides XSS (Cross-site Scripting Hacks) filtering. This can be enabled globally, or upon request.</li> -<li>Standardizes newline characters to \n(In Windows \r\n)</li> -</ul> - - -<h2>XSS Filtering</h2> - -<p>The Input class has the ability to filter input automatically to prevent cross-site scripting attacks. If you want the filter to run automatically every time it encounters POST or COOKIE data you can enable it by opening your -<kbd>application/config/config.php</kbd> file and setting this:</p> - -<code>$config['global_xss_filtering'] = TRUE;</code> - -<p>Please refer to the <a href="security.html">Security class</a> documentation for information on using XSS Filtering in your application.</p> - - -<h2>Using POST, COOKIE, or SERVER Data</h2> - -<p>CodeIgniter comes with three helper functions that let you fetch POST, COOKIE or SERVER items. The main advantage of using the provided -functions rather than fetching an item directly ($_POST['something']) is that the functions will check to see if the item is set and -return false (boolean) if not. This lets you conveniently use data without having to test whether an item exists first. -In other words, normally you might do something like this:</p> - -<code> -if ( ! isset($_POST['something']))<br /> -{<br /> - $something = FALSE;<br /> -}<br /> -else<br /> -{<br /> - $something = $_POST['something'];<br /> -}</code> - -<p>With CodeIgniter's built in functions you can simply do this:</p> - -<code>$something = $this->input->post('something');</code> - -<p>The three functions are:</p> - -<ul> -<li>$this->input->post()</li> -<li>$this->input->cookie()</li> -<li>$this->input->server()</li> -</ul> - -<h2>$this->input->post()</h2> - -<p>The first parameter will contain the name of the POST item you are looking for:</p> - -<code>$this->input->post('some_data');</code> - -<p>The function returns FALSE (boolean) if the item you are attempting to retrieve does not exist.</p> - -<p>The second optional parameter lets you run the data through the XSS filter. It's enabled by setting the second parameter to boolean TRUE;</p> - -<code>$this->input->post('some_data', TRUE);</code> - -<p>To return an array of all POST items call without any parameters.</p> -<p>To return all POST items and pass them through the XSS filter set the first parameter NULL while setting the second parameter to boolean;</p> -<p>The function returns FALSE (boolean) if there are no items in the POST.</p> - -<code> - $this->input->post(NULL, TRUE); // returns all POST items with XSS filter - <br /> - $this->input->post(); // returns all POST items without XSS filter -</code> - -<h2>$this->input->get()</h2> - -<p>This function is identical to the post function, only it fetches get data:</p> - -<code>$this->input->get('some_data', TRUE);</code> - -<p>To return an array of all GET items call without any parameters.</p> -<p>To return all GET items and pass them through the XSS filter set the first parameter NULL while setting the second parameter to boolean;</p> -<p>The function returns FALSE (boolean) if there are no items in the GET.</p> - -<code> - $this->input->get(NULL, TRUE); // returns all GET items with XSS filter - <br /> - $this->input->get(); // returns all GET items without XSS filtering -</code> - -<h2>$this->input->get_post()</h2> - -<p>This function will search through both the post and get streams for data, looking first in post, and then in get:</p> - -<code>$this->input->get_post('some_data', TRUE);</code> - -<h2>$this->input->cookie()</h2> - -<p>This function is identical to the post function, only it fetches cookie data:</p> - -<code>$this->input->cookie('some_data', TRUE);</code> - -<h2>$this->input->server()</h2> - -<p>This function is identical to the above functions, only it fetches server data:</p> - -<code>$this->input->server('some_data');</code> - - -<h2>$this->input->set_cookie()</h2> - -<p>Sets a cookie containing the values you specify. There are two ways to pass information to this function so that a cookie can be set: -Array Method, and Discrete Parameters:</p> - -<h4>Array Method</h4> - -<p>Using this method, an associative array is passed to the first parameter:</p> - -<code>$cookie = array(<br /> - 'name' => 'The Cookie Name',<br /> - 'value' => 'The Value',<br /> - 'expire' => '86500',<br /> - 'domain' => '.some-domain.com',<br /> - 'path' => '/',<br /> - 'prefix' => 'myprefix_',<br /> - 'secure' => TRUE<br /> -);<br /> -<br /> -$this->input->set_cookie($cookie); -</code> - -<p><strong>Notes:</strong></p> - -<p>Only the name and value are required. To delete a cookie set it with the expiration blank.</p> - -<p>The expiration is set in <strong>seconds</strong>, which will be added to the current time. Do not include the time, but rather only the -number of seconds from <em>now</em> that you wish the cookie to be valid. If the expiration is set to -zero the cookie will only last as long as the browser is open.</p> -<p>For site-wide cookies regardless of how your site is requested, add your URL to the <strong>domain</strong> starting with a period, like this: .your-domain.com</p> -<p>The path is usually not needed since the function sets a root path.</p> -<p>The prefix is only needed if you need to avoid name collisions with other identically named cookies for your server.</p> -<p>The secure boolean is only needed if you want to make it a secure cookie by setting it to TRUE.</p> - -<h4>Discrete Parameters</h4> - -<p>If you prefer, you can set the cookie by passing data using individual parameters:</p> - -<code>$this->input->set_cookie($name, $value, $expire, $domain, $path, $prefix, $secure);</code> - -<h2>$this->input->cookie()</h2> - -<p>Lets you fetch a cookie. The first parameter will contain the name of the cookie you are looking for (including any prefixes):</p> - -<code>cookie('some_cookie');</code> - -<p>The function returns FALSE (boolean) if the item you are attempting to retrieve does not exist.</p> - -<p>The second optional parameter lets you run the data through the XSS filter. It's enabled by setting the second parameter to boolean TRUE;</p> - -<p><code>cookie('some_cookie', TRUE);</code></p> - - -<h2>$this->input->ip_address()</h2> -<p>Returns the IP address for the current user. If the IP address is not valid, the function will return an IP of: 0.0.0.0</p> -<code>echo $this->input->ip_address();</code> - - -<h2>$this->input->valid_ip(<var>$ip</var>)</h2> - -<p>Takes an IP address as input and returns TRUE or FALSE (boolean) if it is valid or not. Note: The $this->input->ip_address() function above -validates the IP automatically.</p> - -<code>if ( ! $this->input->valid_ip($ip))<br /> -{<br /> - echo 'Not Valid';<br /> -}<br /> -else<br /> -{<br /> - echo 'Valid';<br /> -}</code> -<p>Accepts an optional second string parameter of "IPv4" or "IPv6" to specify an IP format. The default checks for both formats.</p> - -<h2>$this->input->user_agent()</h2> -<p>Returns the user agent (web browser) being used by the current user. Returns FALSE if it's not available.</p> -<code>echo $this->input->user_agent();</code> -<p>See the <a href="user_agent.html">User Agent Class</a> for methods which extract information from the user agent string.</p> - -<h2>$this->input->request_headers()</h2> -<p>Useful if running in a non-Apache environment where <a href="http://php.net/apache_request_headers">apache_request_headers()</a> will not be supported. Returns an array of headers.</p> - -<code>$headers = $this->input->request_headers();</code> - -<h2>$this->input->get_request_header();</h2> -<p>Returns a single member of the request headers array.</p> - -<code>$this->input->get_request_header('some-header', TRUE);</code> - - -<h2>$this->input->is_ajax_request()</h2> -<p>Checks to see if the <var>HTTP_X_REQUESTED_WITH</var> server header has been set, and returns a boolean response.</p> - - -<h2>$this->input->is_cli_request()</h2> -<p>Checks to see if the <var>STDIN</var> constant is set, which is a failsafe way to see if PHP is being run on the command line.</p> - -<code>$this->input->is_cli_request()</code> - - -</div> -<!-- END CONTENT --> - - -<div id="footer"> -<p> -Previous Topic: <a href="image_lib.html">Image Manipulation Class</a> - · -<a href="#top">Top of Page</a> · -<a href="../index.html">User Guide Home</a> · -Next Topic: <a href="loader.html">Loader Class</a> -</p> -<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2012 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p> -</div> - -</body> -</html>
\ No newline at end of file |