The HTML<link> element is increasingly used for linking a variety of resources for your site: stylesheets,
feeds, favicons, trackbacks, and more. The HeadLink helper provides a simple interface for creating and
aggregating these elements for later retrieval and output in your layout script.
The HeadLink helper has special methods for adding stylesheet links to its stack:
The $media value defaults to ‘screen’, but may be any valid media value. $conditionalStylesheet is a string
or boolean FALSE, and will be used at rendering time to determine if special comments should be included to
prevent loading of the stylesheet on certain platforms. $extras is an array of any extra values that you want
to be added to the tag.
Additionally, the HeadLink helper has special methods for adding ‘alternate’ links to its stack:
The headLink() helper method allows specifying all attributes necessary for a <link> element, and allows
you to also specify placement – whether the new element replaces all others, prepends (top of stack), or appends
(end of stack).
You may specify a headLink at any time. Typically, you will specify global links in your layout script, and
application specific links in your application view scripts. In your layout script, in the <head> section, you will
then echo the helper to output it.
<?php// setting links in a view script:$this->headLink(array('rel'=>'icon','href'=>'/img/favicon.ico'),'PREPEND')->appendStylesheet('/styles/basic.css')->prependStylesheet('/styles/moz.css','screen',true,array('id'=>'my_stylesheet'));// rendering the links from the layout:echo$this->headLink();?>