I don’t think get_categories() is the best option for you in this case because it returns a string with all the categories listed as anchor tags, fine for displaying, but not great for figuring out in code what the categories are. Ok, so the first thing you need to do is grab the product/post object … Read more
When developing a plugin should the functions be grouped together into a Class to avoid namespace conflicts? Yes, but that’s only one of the minor arguments. In-fact that’s not the “true” nature of a class in OOAD. Does using classes create performance overheads for PHP? No, not notably. Bad design and/or bad written code or … Read more
The OpenID plugin you linked is the best one, but it has a minor bug preventing it from working with WordPress 3.0, at least when combined with PHP 5.3. The fix can be found here: http://code.google.com/p/diso/issues/detail?id=161
I can’t give you links to the plugin repo, but here are some great people who share good code (in pretty different styles) on Github. Just take a look at the repos or their gists: Frank Bültge Thomas Scholz Mike Schinkel Franz Josef Kaiser (me 😉
If I understand you correctly you want to have a URL something like the following whose response to the browser will be the content you generate, i.e. your .CSV file and no generated content from WordPress? http://example.com/download/data.csv I think you are looking for the ‘template_redirect’ hook. You can find ‘template_redirect’ in /wp-includes/template-loader.php which is a … Read more
Filters and actions are both assigned to hooks. Functions assigned to hooks are stored in global $wp_filter variable. So all you have to do is to print_r it. print_r($GLOBALS[‘wp_filter’]); PS. add_action function makes a add_filter call. And the latter does $wp_filter[$tag][$priority][$idx]. NOTE: you can directly add this code in functions.php, and you will see a … Read more
Welcome to WordPress stack exchange! Just yesterday I created WP-Markdown, which enables Markdown on your posts. It also provides the same interface as this website (the toolbar, and live preview) – however, currently only for comments and bbPress forums (if enabled). That said, (since it would be straightforward to do), I am planning on adding … Read more
Whenever you find a piece of code without clear installation instructions it is probably a plugin. The example you gave is a good one, because that is the most common case: add_action(‘template_redirect’, ‘remove_404_redirect’, 1); function remove_404_redirect() { // do something } To use such a snippet, put it into a plugin: Create a new file, … Read more
To add our button to the TinyMCE editor we need to do several things: Add our button to the toolbar Register a TinyMCE plugin Create that TinyMCE plug-in which tells TinyMCE what to do when our button is clicked. Steps #1 and #2 In these steps we register our TinyMCE plug-in which will live inside … Read more
As you suggest, the most elegant approach is when your CSS overrides are loaded after the CSS injected by the plugins. This is quite easy to achieve – you just need to make sure that your header.php calls wp_head() before it references your style sheet: <head> <!– all the usual preamble stuff goes here –> … Read more