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    <p>Two good ways to achieve this using methods intended by the Codeigniter developers.</p> <h2>OPTION ONE:</h2> <p>If you always expect an "id" parameter to be present you could take advantage of a feature where you pass the value in the URI immediately after the method (function) you want to call.</p> <p>Example passing <code>/[controller]/[method]/[value]</code>:</p> <pre><code>http://www.website.com/query/index/5 </code></pre> <p>You would then access the value of "id" as an expected parameter of the function.</p> <pre><code>Class Query extends Controller { ... // From your URL I assume you have an index method in the Query controller. function index($id = NULL) { // Show current ID value. echo "ID is $id"; ... } ... } </code></pre> <h2>OPTION TWO:</h2> <p>If you would like to allow many parameters to be passed in addition to ID, you could add all parameters as key=>value pairs to the URI segments in any order.</p> <p>Example passing <code>/[controller]/[method]/[key1]/[val1]/[key2]/[val2]/[key3]/[val3]</code>:</p> <pre><code>http://www.website.com/query/index/id/5/sort/date/highlight/term </code></pre> <p>You would then parse all the URI segments from the 3rd segment ("id") forward into an array of key=>value pairs with the <code>uri_to_assoc($segment)</code> function from the URI Class.</p> <pre><code>Class Query extends Controller { ... // From your code I assume you are calling an index method in the Query controller. function index() { // Get parameters from URI. // URI Class is initialized by the system automatically. $data-&gt;params = $this-&gt;uri-&gt;uri_to_assoc(3); ... } ... } </code></pre> <p>This would give you easy access to all the parameters and they could be in any order in the URI, just like a traditional query string.</p> <p><code>$data-&gt;params</code> would now contain an array of your URI segments:</p> <pre><code>Array ( [id] =&gt; 5 [sort] =&gt; date [highlight] =&gt; term ) </code></pre> <h2>HYBRID OF ONE AND TWO:</h2> <p>You could also do a hybrid of these where ID is passed as an expected parameter and the other options are passed as key=>value pairs. This is a good option when ID is required and the other parameters are all optional.</p> <p>Example passing <code>/[controller]/[method]/[id]/[key1]/[val1]/[key2]/[val2]</code>:</p> <pre><code>http://www.website.com/query/index/5/sort/date/highlight/term </code></pre> <p>You would then parse all the URI segments from the 4th segment ("sort") forward into an array of key=>value pairs with the <code>uri_to_assoc($segment)</code> function from the URI Class.</p> <pre><code>Class Query extends Controller { ... // From your code I assume you are calling an index method in the Query controller. function index($id = NULL) { // Show current ID value. echo "ID is $id"; // Get parameters from URI. // URI Class is initialized by the system automatically. $data-&gt;params = $this-&gt;uri-&gt;uri_to_assoc(4); ... } ... } </code></pre> <p><code>$id</code> would contain your ID value and <code>$data-&gt;params</code> would contain an array of your URI segments:</p>
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