Ah, curly quotes. They look nice, but they’re also such a pain if you display code on your blog, or copy/paste it from another blog. Here’s a very simple recipe that I urge you to use if you display code on your blog. Your readers will say thanks you!
This very useful hack is also very simple to implement: Open the functions.php file from your theme (if your theme don’t have a functions.php file, create one) and paste the following code:
<?php remove_filter('the_content', 'wptexturize'); ?>
As you can see, we used the remove_filter() function, which allow us to remove a function attached to a particular filter hook.
Filters function are very powerful because they allow you to override some WordPress features without modifying WP core.