Initial Import
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+<td><h1>Code Igniter User Guide Version 1.4.0</h1></td>

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+<a href="http://www.codeigniter.com/">Code Igniter Home</a> &nbsp;&#8250;&nbsp;

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+Template Parser Class

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+

+

+<h1>Template Parser Class</h1>

+

+<p>The Template Parser Class enables you to parse pseudo-variables contained within your view files. It can parse simple

+variables or variable tag pairs. If you've never used a template engine, pseudo-variables look like this:</p>

+

+<code>&lt;html&gt;<br />

+&lt;head&gt;<br />

+&lt;title&gt;<kbd>{blog_title}</kbd>&lt;/title&gt;<br />

+&lt;/head&gt;<br />

+&lt;body&gt;<br />

+<br />

+&lt;h3&gt;<kbd>{blog_heading}</kbd>&lt;/h3&gt;<br />

+<br />

+<kbd>{blog_entries}</kbd><br />

+&lt;h5&gt;<kbd>{title}</kbd>&lt;/h5&gt;<br />

+&lt;p&gt;<kbd>{body}</kbd>&lt;/p&gt;<br />

+<kbd>{/blog_entries}</kbd><br />

+

+&lt;/body&gt;<br />

+&lt;/html&gt;</code>

+

+<p>These variables are not actual PHP variables, but rather plain text representations that allow you to eliminate

+PHP from your templates (view files).</p>

+

+<p class="important"><strong>Note:</strong> Code Igniter does <strong>not</strong> require you to use this class

+since using pure PHP in your view pages lets them run a little faster.  However, some developers prefer to use a template engine if 

+they work with designers who they feel would find some confusion working with PHP.</p>

+

+<p><strong>Also Note:</strong> The Template Parser Class is <strong>not</strong> not a

+full-blown template parsing solution. We've kept it very lean on purpose in order to maintain maximum performance.

+

+</p>

+

+

+<h2>Initializing the Class</h2>

+

+<p>Like most other classes in Code Igniter, the Parser class is initialized in your controller using the <dfn>$this->load->library</dfn> function:</p>

+

+<code>$this->load->library('parser');</code>

+<p>Once loaded, the Parser library object will be available using: <dfn>$this->parser</dfn></p>

+

+<p>The following functions are available in this library:</p>

+

+<h2>$this->parser->parse()</h2>

+

+<p>This variable accepts a template name and data array as input, and it generates a parsed version.  Example:</p>

+

+<code>$this->load->library('parser');<br />

+<br />

+$data = array(<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'blog_title' => 'My Blog Title',<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'blog_heading' => 'My Blog Heading'<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;);<br />

+<br />

+$this->parser->parse('blog_template', $data);</code>

+

+<p>The first parameter contains the name of the <a href="../general/views.html">view file</a> (in this example the file would be called blog_template.php),

+and the second parameter contains an associative array of data to be replaced in the template.  In the above example, the

+template would contain two variables: {blog_title} and {blog_heading}</p>

+

+<p>There is no need to "echo" or do something with the data returned by <dfn>$this->parser->parse()</dfn>.  It is automatically

+passed to the output class to be sent to the browser.  However, if you do want the data returned instead of sent to the output class you can 

+pass TRUE (boolean) to the third parameter:</p>

+

+<code>$string = $this->parser->parse('blog_template', $data, TRUE);</code>

+

+

+<h2>Variable Pairs</h2>

+

+<p>The above example code allows simple variables to be replaced.  What if you would like an entire block of variables to be

+repeated, with each iteration containing new values?  Consider the template example we showed at the top of the page:</p>

+

+<code>&lt;html&gt;<br />

+&lt;head&gt;<br />

+&lt;title&gt;<kbd>{blog_title}</kbd>&lt;/title&gt;<br />

+&lt;/head&gt;<br />

+&lt;body&gt;<br />

+<br />

+&lt;h3&gt;<kbd>{blog_heading}</kbd>&lt;/h3&gt;<br />

+<br />

+<kbd>{blog_entries}</kbd><br />

+&lt;h5&gt;<kbd>{title}</kbd>&lt;/h5&gt;<br />

+&lt;p&gt;<kbd>{body}</kbd>&lt;/p&gt;<br />

+<kbd>{/blog_entries}</kbd><br />

+

+&lt;/body&gt;<br />

+&lt;/html&gt;</code>

+

+<p>In the above code you'll notice a pair of variables: <kbd>{blog_entries}</kbd> data... <kbd>{/blog_entries}</kbd>.

+In a case like this, the entire chunk of data between these pairs would be repeated multiple times, corresponding

+to the number of rows in a result.</p>

+

+<p>Parsing variable pairs is done using the identical code shown above to parse single variables,  

+except, you will add a multi-dimensional array corresponding to your variable pair data.

+Consider this example:</p>

+

+

+<code>$this->load->library('parser');<br />

+<br />

+$data = array(<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'blog_title'&nbsp;&nbsp; => 'My Blog Title',<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'blog_heading' => 'My Blog Heading',<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'blog_entries' => array(<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;array('title' => 'Title 1', 'body' => 'Body 1'),<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;array('title' => 'Title 2', 'body' => 'Body 2'),<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;array('title' => 'Title 3', 'body' => 'Body 3'),<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;array('title' => 'Title 4', 'body' => 'Body 4'),<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;array('title' => 'Title 5', 'body' => 'Body 5')<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;);<br />

+<br />

+$this->parser->parse('blog_template', $data);</code>

+

+<p>If your "pair" data is coming from a database result, which is already a multi-dimensional array, you can simply

+use the database result function:</p>

+

+<code>

+$query = $this->db->query("SELECT * FROM blog");<br />

+<br />

+$this->load->library('parser');<br />

+<br />

+$data = array(<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'blog_title'&nbsp;&nbsp; => 'My Blog Title',<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'blog_heading' => 'My Blog Heading',<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'blog_entries' => $query->result_array()<br />

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;);<br />

+<br />

+$this->parser->parse('blog_template', $data);</code>

+

+

+

+

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