The “Meta Functions Shortcode” Plugin installs the Shortcode ‘meta’. With it you can access the custom fields of your articles by a simple shortcode.
Shortcode Syntax: [meta func="" name="" alt=""]
The shortcode has three functions yet:
[meta func="url" name="download_url" alt="Download here"]
This little code in your article displays a link using your custom field “download_url” as the link target and “Download here” as the caption. If you leave the “alt” argument empty then it uses the link target as the caption.
The resulting html code is:
<a href='{download_url}'>{alt}</a>
You can extend the plugin by adding the PHP function
function meta_functions_shortcode_{func}($meta, $alt="") {
return "your desired text or generated html content";
}
by writing your own plugin file with the function in it. Be sure to replace {func} with your desired function name (will result in the parameter “func” in the shortcode). $meta will be the value of the custom field and $alt the “alt” parameter.
The function should return the text by which the shortcode will be replaced. For example the “_plain” function simply returns $meta or $alt if $meta is empty.
This method is more convenient. You can add new functions in the admin panel. For this go to the options page called “Meta Functions Shortcode”.
Here you can enter a new function name, specify parameter names and set the output html code with the parameters.
Example:
<a href='{link_url}'>{link_caption}</a>
If you now enter the shortcode [meta func=”link” link_url=”download_url” link_caption=”download_caption”] then in the article/page
it will be replaced by <a href='contents of custom field download_url'><i>contents of custom field download_caption</i></a>
.