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diff --git a/user_guide/libraries/parser.html b/user_guide/libraries/parser.html new file mode 100644 index 000000000..be6d4814b --- /dev/null +++ b/user_guide/libraries/parser.html @@ -0,0 +1,851 @@ + + +<!DOCTYPE html> +<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> +<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + + <title>Template Parser Class — CodeIgniter 3.1.5 documentation</title> + + + + + <link rel="shortcut icon" href="../_static/ci-icon.ico"/> + + + + <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'> + + + + + + + + + + <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> + + + + <link rel="top" title="CodeIgniter 3.1.5 documentation" href="../index.html"/> + <link rel="up" 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href="../database/examples.html">Quick Start: Usage Examples</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li> +</ul> +</li> +</ul> +<ul> +<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li> +</ul> +</li> +</ul> + + + + </div> + + </nav> + + <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> + + + <nav class="wy-nav-top" role="navigation" aria-label="top navigation"> + <i data-toggle="wy-nav-top" class="fa fa-bars"></i> + <a href="../index.html">CodeIgniter</a> + </nav> + + + + <div class="wy-nav-content"> + <div class="rst-content"> + <div role="navigation" aria-label="breadcrumbs navigation"> + <ul class="wy-breadcrumbs"> + <li><a href="../index.html">Docs</a> »</li> + + <li><a href="index.html">Libraries</a> »</li> + + <li>Template Parser Class</li> + <li class="wy-breadcrumbs-aside"> + + </li> + <div style="float:right;margin-left:5px;" id="closeMe"> + <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> + </div> + </ul> + <hr/> +</div> + <div role="main" class="document"> + + <div class="section" id="template-parser-class"> +<h1>Template Parser Class<a class="headerlink" href="#template-parser-class" title="Permalink to this headline">¶</a></h1> +<p>The Template Parser Class can perform simple text substitution for +pseudo-variables contained within your view files. +It can parse simple variables or variable tag pairs.</p> +<p>If you’ve never used a template engine, +pseudo-variable names are enclosed in braces, like this:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><</span><span class="nx">html</span><span class="o">></span> + <span class="o"><</span><span class="nx">head</span><span class="o">></span> + <span class="o"><</span><span class="nx">title</span><span class="o">></span><span class="p">{</span><span class="nx">blog_title</span><span class="p">}</span><span class="o"></</span><span class="nx">title</span><span class="o">></span> + <span class="o"></</span><span class="nx">head</span><span class="o">></span> + <span class="o"><</span><span class="nx">body</span><span class="o">></span> + <span class="o"><</span><span class="nx">h3</span><span class="o">></span><span class="p">{</span><span class="nx">blog_heading</span><span class="p">}</span><span class="o"></</span><span class="nx">h3</span><span class="o">></span> + + <span class="p">{</span><span class="nx">blog_entries</span><span class="p">}</span> + <span class="o"><</span><span class="nx">h5</span><span class="o">></span><span class="p">{</span><span class="nx">title</span><span class="p">}</span><span class="o"></</span><span class="nx">h5</span><span class="o">></span> + <span class="o"><</span><span class="nx">p</span><span class="o">></span><span class="p">{</span><span class="nx">body</span><span class="p">}</span><span class="o"></</span><span class="nx">p</span><span class="o">></span> + <span class="p">{</span><span class="o">/</span><span class="nx">blog_entries</span><span class="p">}</span> + + <span class="o"></</span><span class="nx">body</span><span class="o">></span> +<span class="o"></</span><span class="nx">html</span><span class="o">></span> +</pre></div> +</div> +<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> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">CodeIgniter 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> +</div> +<div class="admonition important"> +<p class="first admonition-title">Important</p> +<p class="last">The Template Parser Class is <strong>not</strong> a full-blown +template parsing solution. We’ve kept it very lean on purpose in order +to maintain maximum performance.</p> +</div> +<div class="contents local topic" id="contents"> +<ul class="simple"> +<li><a class="reference internal" href="#using-the-template-parser-class" id="id1">Using the Template Parser Class</a><ul> +<li><a class="reference internal" href="#initializing-the-class" id="id2">Initializing the Class</a></li> +<li><a class="reference internal" href="#parsing-templates" id="id3">Parsing templates</a></li> +<li><a class="reference internal" href="#variable-pairs" id="id4">Variable Pairs</a></li> +<li><a class="reference internal" href="#usage-notes" id="id5">Usage Notes</a></li> +<li><a class="reference internal" href="#view-fragments" id="id6">View Fragments</a></li> +</ul> +</li> +<li><a class="reference internal" href="#class-reference" id="id7">Class Reference</a></li> +</ul> +</div> +<div class="custom-index container"></div><div class="section" id="using-the-template-parser-class"> +<h2><a class="toc-backref" href="#id1">Using the Template Parser Class</a><a class="headerlink" href="#using-the-template-parser-class" title="Permalink to this headline">¶</a></h2> +<div class="section" id="initializing-the-class"> +<h3><a class="toc-backref" href="#id2">Initializing the Class</a><a class="headerlink" href="#initializing-the-class" title="Permalink to this headline">¶</a></h3> +<p>Like most other classes in CodeIgniter, the Parser class is initialized +in your controller using the <tt class="docutils literal"><span class="pre">$this->load->library()</span></tt> method:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'parser'</span><span class="p">);</span> +</pre></div> +</div> +<p>Once loaded, the Parser library object will be available using: +$this->parser</p> +</div> +<div class="section" id="parsing-templates"> +<h3><a class="toc-backref" href="#id3">Parsing templates</a><a class="headerlink" href="#parsing-templates" title="Permalink to this headline">¶</a></h3> +<p>You can use the <tt class="docutils literal"><span class="pre">parse()</span></tt> method to parse (or render) simple templates, +like this:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'blog_title'</span> <span class="o">=></span> <span class="s1">'My Blog Title'</span><span class="p">,</span> + <span class="s1">'blog_heading'</span> <span class="o">=></span> <span class="s1">'My Blog Heading'</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse</span><span class="p">(</span><span class="s1">'blog_template'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> +</pre></div> +</div> +<p>The first parameter contains the name of the <a class="reference internal" href="../general/views.html"><em>view +file</em></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 +$this->parser->parse(). It is automatically passed to the output class +to be sent to the browser. However, if you do want the data returned +instead of sent to the output class you can pass TRUE (boolean) as the +third parameter:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$string</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse</span><span class="p">(</span><span class="s1">'blog_template'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> +</pre></div> +</div> +</div> +<div class="section" id="variable-pairs"> +<h3><a class="toc-backref" href="#id4">Variable Pairs</a><a class="headerlink" href="#variable-pairs" title="Permalink to this headline">¶</a></h3> +<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> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><</span><span class="nx">html</span><span class="o">></span> + <span class="o"><</span><span class="nx">head</span><span class="o">></span> + <span class="o"><</span><span class="nx">title</span><span class="o">></span><span class="p">{</span><span class="nx">blog_title</span><span class="p">}</span><span class="o"></</span><span class="nx">title</span><span class="o">></span> + <span class="o"></</span><span class="nx">head</span><span class="o">></span> + <span class="o"><</span><span class="nx">body</span><span class="o">></span> + <span class="o"><</span><span class="nx">h3</span><span class="o">></span><span class="p">{</span><span class="nx">blog_heading</span><span class="p">}</span><span class="o"></</span><span class="nx">h3</span><span class="o">></span> + + <span class="p">{</span><span class="nx">blog_entries</span><span class="p">}</span> + <span class="o"><</span><span class="nx">h5</span><span class="o">></span><span class="p">{</span><span class="nx">title</span><span class="p">}</span><span class="o"></</span><span class="nx">h5</span><span class="o">></span> + <span class="o"><</span><span class="nx">p</span><span class="o">></span><span class="p">{</span><span class="nx">body</span><span class="p">}</span><span class="o"></</span><span class="nx">p</span><span class="o">></span> + <span class="p">{</span><span class="o">/</span><span class="nx">blog_entries</span><span class="p">}</span> + + <span class="o"></</span><span class="nx">body</span><span class="o">></span> +<span class="o"></</span><span class="nx">html</span><span class="o">></span> +</pre></div> +</div> +<p>In the above code you’ll notice a pair of variables: {blog_entries} +data... {/blog_entries}. 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 the “blog_entries” element of the parameters array.</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> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'parser'</span><span class="p">);</span> + +<span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'blog_title'</span> <span class="o">=></span> <span class="s1">'My Blog Title'</span><span class="p">,</span> + <span class="s1">'blog_heading'</span> <span class="o">=></span> <span class="s1">'My Blog Heading'</span><span class="p">,</span> + <span class="s1">'blog_entries'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Title 1'</span><span class="p">,</span> <span class="s1">'body'</span> <span class="o">=></span> <span class="s1">'Body 1'</span><span class="p">),</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Title 2'</span><span class="p">,</span> <span class="s1">'body'</span> <span class="o">=></span> <span class="s1">'Body 2'</span><span class="p">),</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Title 3'</span><span class="p">,</span> <span class="s1">'body'</span> <span class="o">=></span> <span class="s1">'Body 3'</span><span class="p">),</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Title 4'</span><span class="p">,</span> <span class="s1">'body'</span> <span class="o">=></span> <span class="s1">'Body 4'</span><span class="p">),</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Title 5'</span><span class="p">,</span> <span class="s1">'body'</span> <span class="o">=></span> <span class="s1">'Body 5'</span><span class="p">)</span> + <span class="p">)</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse</span><span class="p">(</span><span class="s1">'blog_template'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> +</pre></div> +</div> +<p>If your “pair” data is coming from a database result, which is already a +multi-dimensional array, you can simply use the database <tt class="docutils literal"><span class="pre">result_array()</span></tt> +method:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s2">"SELECT * FROM blog"</span><span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'parser'</span><span class="p">);</span> + +<span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'blog_title'</span> <span class="o">=></span> <span class="s1">'My Blog Title'</span><span class="p">,</span> + <span class="s1">'blog_heading'</span> <span class="o">=></span> <span class="s1">'My Blog Heading'</span><span class="p">,</span> + <span class="s1">'blog_entries'</span> <span class="o">=></span> <span class="nv">$query</span><span class="o">-></span><span class="na">result_array</span><span class="p">()</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse</span><span class="p">(</span><span class="s1">'blog_template'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> +</pre></div> +</div> +</div> +<div class="section" id="usage-notes"> +<h3><a class="toc-backref" href="#id5">Usage Notes</a><a class="headerlink" href="#usage-notes" title="Permalink to this headline">¶</a></h3> +<p>If you include substitution parameters that are not referenced in your +template, they are ignored:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$template</span> <span class="o">=</span> <span class="s1">'Hello, {firstname} {lastname}'</span><span class="p">;</span> +<span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Mr'</span><span class="p">,</span> + <span class="s1">'firstname'</span> <span class="o">=></span> <span class="s1">'John'</span><span class="p">,</span> + <span class="s1">'lastname'</span> <span class="o">=></span> <span class="s1">'Doe'</span> +<span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse_string</span><span class="p">(</span><span class="nv">$template</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> + +<span class="c1">// Result: Hello, John Doe</span> +</pre></div> +</div> +<p>If you do not include a substitution parameter that is referenced in your +template, the original pseudo-variable is shown in the result:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$template</span> <span class="o">=</span> <span class="s1">'Hello, {firstname} {initials} {lastname}'</span><span class="p">;</span> +<span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Mr'</span><span class="p">,</span> + <span class="s1">'firstname'</span> <span class="o">=></span> <span class="s1">'John'</span><span class="p">,</span> + <span class="s1">'lastname'</span> <span class="o">=></span> <span class="s1">'Doe'</span> +<span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse_string</span><span class="p">(</span><span class="nv">$template</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> + +<span class="c1">// Result: Hello, John {initials} Doe</span> +</pre></div> +</div> +<p>If you provide a string substitution parameter when an array is expected, +i.e. for a variable pair, the substitution is done for the opening variable +pair tag, but the closing variable pair tag is not rendered properly:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$template</span> <span class="o">=</span> <span class="s1">'Hello, {firstname} {lastname} ({degrees}{degree} {/degrees})'</span><span class="p">;</span> +<span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'degrees'</span> <span class="o">=></span> <span class="s1">'Mr'</span><span class="p">,</span> + <span class="s1">'firstname'</span> <span class="o">=></span> <span class="s1">'John'</span><span class="p">,</span> + <span class="s1">'lastname'</span> <span class="o">=></span> <span class="s1">'Doe'</span><span class="p">,</span> + <span class="s1">'titles'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'degree'</span> <span class="o">=></span> <span class="s1">'BSc'</span><span class="p">),</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'degree'</span> <span class="o">=></span> <span class="s1">'PhD'</span><span class="p">)</span> + <span class="p">)</span> +<span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse_string</span><span class="p">(</span><span class="nv">$template</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> + +<span class="c1">// Result: Hello, John Doe (Mr{degree} {/degrees})</span> +</pre></div> +</div> +<p>If you name one of your individual substitution parameters the same as one +used inside a variable pair, the results may not be as expected:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$template</span> <span class="o">=</span> <span class="s1">'Hello, {firstname} {lastname} ({degrees}{degree} {/degrees})'</span><span class="p">;</span> +<span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'degree'</span> <span class="o">=></span> <span class="s1">'Mr'</span><span class="p">,</span> + <span class="s1">'firstname'</span> <span class="o">=></span> <span class="s1">'John'</span><span class="p">,</span> + <span class="s1">'lastname'</span> <span class="o">=></span> <span class="s1">'Doe'</span><span class="p">,</span> + <span class="s1">'degrees'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'degree'</span> <span class="o">=></span> <span class="s1">'BSc'</span><span class="p">),</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'degree'</span> <span class="o">=></span> <span class="s1">'PhD'</span><span class="p">)</span> + <span class="p">)</span> +<span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse_string</span><span class="p">(</span><span class="nv">$template</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> + +<span class="c1">// Result: Hello, John Doe (Mr Mr )</span> +</pre></div> +</div> +</div> +<div class="section" id="view-fragments"> +<h3><a class="toc-backref" href="#id6">View Fragments</a><a class="headerlink" href="#view-fragments" title="Permalink to this headline">¶</a></h3> +<p>You do not have to use variable pairs to get the effect of iteration in +your views. It is possible to use a view fragment for what would be inside +a variable pair, and to control the iteration in your controller instead +of in the view.</p> +<p>An example with the iteration controlled in the view:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$template</span> <span class="o">=</span> <span class="s1">'<ul>{menuitems}</span> +<span class="s1"> <li><a href="{link}">{title}</a></li></span> +<span class="s1">{/menuitems}</ul>'</span><span class="p">;</span> + +<span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'menuitems'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'First Link'</span><span class="p">,</span> <span class="s1">'link'</span> <span class="o">=></span> <span class="s1">'/first'</span><span class="p">),</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Second Link'</span><span class="p">,</span> <span class="s1">'link'</span> <span class="o">=></span> <span class="s1">'/second'</span><span class="p">),</span> + <span class="p">)</span> +<span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse_string</span><span class="p">(</span><span class="nv">$template</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> +</pre></div> +</div> +<p>Result:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><</span><span class="nx">ul</span><span class="o">></span> + <span class="o"><</span><span class="nx">li</span><span class="o">><</span><span class="nx">a</span> <span class="nx">href</span><span class="o">=</span><span class="s2">"/first"</span><span class="o">></span><span class="nx">First</span> <span class="nx">Link</span><span class="o"></</span><span class="nx">a</span><span class="o">></</span><span class="nx">li</span><span class="o">></span> + <span class="o"><</span><span class="nx">li</span><span class="o">><</span><span class="nx">a</span> <span class="nx">href</span><span class="o">=</span><span class="s2">"/second"</span><span class="o">></span><span class="nx">Second</span> <span class="nx">Link</span><span class="o"></</span><span class="nx">a</span><span class="o">></</span><span class="nx">li</span><span class="o">></span> +<span class="o"></</span><span class="nx">ul</span><span class="o">></span> +</pre></div> +</div> +<p>An example with the iteration controlled in the controller, +using a view fragment:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$temp</span> <span class="o">=</span> <span class="s1">''</span><span class="p">;</span> +<span class="nv">$template1</span> <span class="o">=</span> <span class="s1">'<li><a href="{link}">{title}</a></li>'</span><span class="p">;</span> +<span class="nv">$data1</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'First Link'</span><span class="p">,</span> <span class="s1">'link'</span> <span class="o">=></span> <span class="s1">'/first'</span><span class="p">),</span> + <span class="k">array</span><span class="p">(</span><span class="s1">'title'</span> <span class="o">=></span> <span class="s1">'Second Link'</span><span class="p">,</span> <span class="s1">'link'</span> <span class="o">=></span> <span class="s1">'/second'</span><span class="p">),</span> +<span class="p">);</span> + +<span class="k">foreach</span> <span class="p">(</span><span class="nv">$data1</span> <span class="k">as</span> <span class="nv">$menuitem</span><span class="p">)</span> +<span class="p">{</span> + <span class="nv">$temp</span> <span class="o">.=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse_string</span><span class="p">(</span><span class="nv">$template1</span><span class="p">,</span> <span class="nv">$menuitem</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> +<span class="p">}</span> + +<span class="nv">$template</span> <span class="o">=</span> <span class="s1">'<ul>{menuitems}</ul>'</span><span class="p">;</span> +<span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'menuitems'</span> <span class="o">=></span> <span class="nv">$temp</span> +<span class="p">);</span> +<span class="nv">$this</span><span class="o">-></span><span class="na">parser</span><span class="o">-></span><span class="na">parse_string</span><span class="p">(</span><span class="nv">$template</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> +</pre></div> +</div> +<p>Result:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><</span><span class="nx">ul</span><span class="o">></span> + <span class="o"><</span><span class="nx">li</span><span class="o">><</span><span class="nx">a</span> <span class="nx">href</span><span class="o">=</span><span class="s2">"/first"</span><span class="o">></span><span class="nx">First</span> <span class="nx">Link</span><span class="o"></</span><span class="nx">a</span><span class="o">></</span><span class="nx">li</span><span class="o">></span> + <span class="o"><</span><span class="nx">li</span><span class="o">><</span><span class="nx">a</span> <span class="nx">href</span><span class="o">=</span><span class="s2">"/second"</span><span class="o">></span><span class="nx">Second</span> <span class="nx">Link</span><span class="o"></</span><span class="nx">a</span><span class="o">></</span><span class="nx">li</span><span class="o">></span> +<span class="o"></</span><span class="nx">ul</span><span class="o">></span> +</pre></div> +</div> +</div> +</div> +<div class="section" id="class-reference"> +<h2><a class="toc-backref" href="#id7">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2> +<dl class="class"> +<dt id="CI_Parser"> +<em class="property">class </em><tt class="descname">CI_Parser</tt><a class="headerlink" href="#CI_Parser" title="Permalink to this definition">¶</a></dt> +<dd><dl class="method"> +<dt id="CI_Parser::parse"> +<tt class="descname">parse</tt><big>(</big><em>$template</em>, <em>$data</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Parser::parse" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$template</strong> (<em>string</em>) – Path to view file</li> +<li><strong>$data</strong> (<em>array</em>) – Variable data</li> +<li><strong>$return</strong> (<em>bool</em>) – Whether to only return the parsed template</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Parsed template string</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> +</td> +</tr> +</tbody> +</table> +<p>Parses a template from the provided path and variables.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Parser::parse_string"> +<tt class="descname">parse_string</tt><big>(</big><em>$template</em>, <em>$data</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Parser::parse_string" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$template</strong> (<em>string</em>) – Path to view file</li> +<li><strong>$data</strong> (<em>array</em>) – Variable data</li> +<li><strong>$return</strong> (<em>bool</em>) – Whether to only return the parsed template</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Parsed template string</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p> +</td> +</tr> +</tbody> +</table> +<p>This method works exactly like <tt class="docutils literal"><span class="pre">parse()</span></tt>, only it accepts +the template as a string instead of loading a view file.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Parser::set_delimiters"> +<tt class="descname">set_delimiters</tt><big>(</big><span class="optional">[</span><em>$l = '{'</em><span class="optional">[</span>, <em>$r = '}'</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Parser::set_delimiters" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$l</strong> (<em>string</em>) – Left delimiter</li> +<li><strong>$r</strong> (<em>string</em>) – Right delimiter</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">void</p> +</td> +</tr> +</tbody> +</table> +<p>Sets the delimiters (opening and closing) for a +pseudo-variable “tag” in a template.</p> +</dd></dl> + +</dd></dl> + +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="security.html" class="btn btn-neutral float-right" title="Security Class">Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="pagination.html" class="btn btn-neutral" title="Pagination Class"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014 - 2017, British Columbia Institute of Technology. + Last updated on Jun 19, 2017. + </p> + </div> + + Built 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