WordPress: how to add specific classes to the_tags()
A simple approach at injecting custom classes into the generated taglist HTML, with code and explanation.
PHP
Why your Google fonts might not be loading in WordPress
A change in Google Fonts' URI structure for embedding combined fonts can lead to an incompatibility with WordPress.
PHP validation and sanitization with the Filter API
Safely filter webforms and other sources of data with this core API.
PHP semantics – the array push
When code is always written the way that it's written, it sometimes takes an outsider voice to question the rote.
PHP class hoisting bug
When you muck around with PHP enough, every now and then you'll find a skeleton in the closet.
In your PHP classes, accessing all your private members
Implementation isn't always clean. Sometimes you'll have to get your code dirty.