PHP is a loosely typed language and assigns types to variables depending what is assigned to it. Variables coming from get/post and cookies etc are generally cast as strings rather than other types and there are often other times when you need to specifically cast a type in PHP as e.g. an integer. This post looks at how to type cast in PHP and some of the results than can come about from type casting.
When a web browser moves from one website to another and between pages of a website, it can optionally pass the URL it came from. This is called the HTTP_REFERER, and this post looks at how to use this variable with PHP.
PHP has a function called getimagesize() for getting the width and height from an image. I’m always forgetting the name of the getimagesize() function so I decided to write a post about it and showing some examples and that way maybe I’ll remember in the future…
Sometimes you might want to call a function in Javascript but check if the function exists before calling it. This is very simple and is covered in this post.
So you have a file that starts with a dash/hyphen/- and need to delete it. But when you try to do so, the "rm" command complains that you have passed an "invalid option –". This post looks at the simple solution to deleting a file that starts with a dash/hyphen.
Private and public RSA keys can be generated on Unix based systems (such as Linux and FreeBSD) to provide greater security when logging into a server using SSH. The ssh-keygen command allows you to generate, manage and convert these authentication keys.