HTML Helper
+ +The HTML Helper file contains functions that assist in working with HTML.
+ +-
+
- br() +
- heading() +
- img() +
- link_tag() +
- nbs() +
- ol() and ul() +
- meta() +
- doctype() +
Loading this Helper
+ +This helper is loaded using the following code:
+$this->load->helper('html');
+
+The following functions are available:
+ +br()
+Generates line break tags (<br />) based on the number you submit. Example:
+echo br(3);
+The above would produce: <br /><br /><br />
+ +heading()
+Lets you create HTML <h1> tags. The first parameter will contain the data, the +second the size of the heading. Example:
+echo heading('Welcome!', 3);
+The above would produce: <h3>Welcome!</h3>
+ +img()
+Lets you create HTML <img /> tags. The first parameter contains the image source. Example:
+echo img('images/picture.jpg');
+// gives <img src="http://site.com/images/picture.jpg" />
+There is an optional second parameter that is a TRUE/FALSE value that specifics if the src should have the page specified by $config['index_page'] added to the address it creates. Presumably, this would be if you were using a media controller.
+echo img('images/picture.jpg', TRUE);
+// gives <img src="http://site.com/index.php/images/picture.jpg" alt="" />
Additionally, an associative array can be passed to the img() function for complete control over all attributes and values. If an alt attribute is not provided, CodeIgniter will generate an empty string.
+ $image_properties = array(
+ 'src' => 'images/picture.jpg',
+ 'alt' => 'Me, demonstrating how to eat 4 slices of pizza at one time',
+ 'class' => 'post_images',
+ 'width' => '200',
+ 'height' => '200',
+ 'title' => 'That was quite a night',
+ 'rel' => 'lightbox',
+ );
+
+ img($image_properties);
+ // <img src="http://site.com/index.php/images/picture.jpg" alt="Me, demonstrating how to eat 4 slices of pizza at one time" class="post_images" width="200" height="200" title="That was quite a night" rel="lightbox" />
link_tag()
+Lets you create HTML <link /> tags. This is useful for stylesheet links, as well as other links. The parameters are href, with optional rel, type, title, media and index_page. index_page is a TRUE/FALSE value that specifics if the href should have the page specified by $config['index_page'] added to the address it creates.
+echo link_tag('css/mystyles.css');
+// gives <link href="http://site.com/css/mystyles.css" rel="stylesheet" type="text/css" />
Further examples:
+ +
+ echo link_tag('favicon.ico', 'shortcut icon', 'image/ico');
+ // <link href="http://site.com/favicon.ico" rel="shortcut icon" type="image/ico" />
+
+
+ echo link_tag('feed', 'alternate', 'application/rss+xml', 'My RSS Feed');
+ // <link href="http://site.com/feed" rel="alternate" type="application/rss+xml" title="My RSS Feed" />
+Additionally, an associative array can be passed to the link() function for complete control over all attributes and values.
+
+ $link = array(
+ 'href' => 'css/printer.css',
+ 'rel' => 'stylesheet',
+ 'type' => 'text/css',
+ 'media' => 'print'
+ );
+
+ echo link_tag($link);
+ // <link href="http://site.com/css/printer.css" rel="stylesheet" type="text/css" media="print" />
nbs()
+Generates non-breaking spaces ( ) based on the number you submit. Example:
+echo nbs(3);
+The above would produce:
+ +ol() and ul()
+ +Permits you to generate ordered or unordered HTML lists from simple or multi-dimensional arrays. Example:
+ +
+$this->load->helper('html');
+
+$list = array(
+ 'red',
+ 'blue',
+ 'green',
+ 'yellow'
+ );
+
+$attributes = array(
+ 'class' => 'boldlist',
+ 'id' => 'mylist'
+ );
+
+echo ul($list, $attributes);
+
+
+The above code will produce this:
+ +
+<ul class="boldlist" id="mylist">
+ <li>red</li>
+ <li>blue</li>
+ <li>green</li>
+ <li>yellow</li>
+</ul>
+
+
+Here is a more complex example, using a multi-dimensional array:
+ +
+$this->load->helper('html');
+
+$attributes = array(
+ 'class' => 'boldlist',
+ 'id' => 'mylist'
+ );
+
+$list = array(
+ 'colors' => array(
+ 'red',
+ 'blue',
+ 'green'
+ ),
+ 'shapes' => array(
+ 'round',
+ 'square',
+ 'circles' => array(
+ 'ellipse',
+ 'oval',
+ 'sphere'
+ )
+ ),
+ 'moods' => array(
+ 'happy',
+ 'upset' => array(
+ 'defeated' => array(
+ 'dejected',
+ 'disheartened',
+ 'depressed'
+ ),
+ 'annoyed',
+ 'cross',
+ 'angry'
+ )
+ )
+ );
+
+
+echo ul($list, $attributes);
+
+The above code will produce this:
+ +
+<ul class="boldlist" id="mylist">
+ <li>colors
+ <ul>
+ <li>red</li>
+ <li>blue</li>
+ <li>green</li>
+ </ul>
+ </li>
+ <li>shapes
+ <ul>
+ <li>round</li>
+ <li>suare</li>
+ <li>circles
+ <ul>
+ <li>elipse</li>
+ <li>oval</li>
+ <li>sphere</li>
+ </ul>
+ </li>
+ </ul>
+ </li>
+ <li>moods
+ <ul>
+ <li>happy</li>
+ <li>upset
+ <ul>
+ <li>defeated
+ <ul>
+ <li>dejected</li>
+ <li>disheartened</li>
+ <li>depressed</li>
+ </ul>
+ </li>
+ <li>annoyed</li>
+ <li>cross</li>
+ <li>angry</li>
+ </ul>
+ </li>
+ </ul>
+ </li>
+</ul>
+
+
+
+
+meta()
+ +Helps you generate meta tags. You can pass strings to the function, or simple arrays, or multidimensional ones. Examples:
+ +
+echo meta('description', 'My Great site');
+// Generates: <meta name="description" content="My Great Site" />
+
+
+echo meta('Content-type', 'text/html; charset=utf-8', 'equiv'); // Note the third parameter. Can be "equiv" or "name"
+// Generates: <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
+
+
+
+echo meta(array('name' => 'robots', 'content' => 'no-cache'));
+// Generates: <meta name="robots" content="no-cache" />
+
+
+
+$meta = array(
+ array('name' => 'robots', 'content' => 'no-cache'),
+ array('name' => 'description', 'content' => 'My Great Site'),
+ array('name' => 'keywords', 'content' => 'love, passion, intrigue, deception'),
+ array('name' => 'robots', 'content' => 'no-cache'),
+ array('name' => 'Content-type', 'content' => 'text/html; charset=utf-8', 'type' => 'equiv')
+ );
+
+echo meta($meta);
+
+// Generates:
+// <meta name="robots" content="no-cache" />
+// <meta name="description" content="My Great Site" />
+// <meta name="keywords" content="love, passion, intrigue, deception" />
+// <meta name="robots" content="no-cache" />
+// <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
+
+
+
+doctype()
+ +Helps you generate document type declarations, or DTD's. XHTML 1.0 Strict is used by default, but many doctypes are available.
+ +
+echo doctype();
+// <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+
+echo doctype('html4-trans');
+// <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+
+
+The following is a list of doctype choices. These are configurable, and pulled from application/config/doctypes.php
+ +| Doctype | +Option | +Result | +
|---|---|---|
| XHTML 1.1 | +doctype('xhtml11') | +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> | +
| XHTML 1.0 Strict | +doctype('xhtml1-strict') | +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> | +
| XHTML 1.0 Transitional | +doctype('xhtml1-trans') | +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | +
| XHTML 1.0 Frameset | +doctype('xhtml1-frame') | +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd"> | +
| HTML 5 | +doctype('html5') | +<!DOCTYPE html> | +
| HTML 4 Strict | +doctype('html4-strict') | +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> | +
| HTML 4 Transitional | +doctype('html4-trans') | +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> | +
| HTML 4 Frameset | +doctype('html4-frame') | +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd"> | +