Uninitialized variables show as a type of undefined. So do variables that haven’t been declared at all. We should always initialize variables so that we know that undefined means we haven’t declared the variable. null is an empty object pointer. We should initialize objects to null so that the typeof will return the correct data […]
JavaScript Variables: Initialization, Booleans, and Numbers Read More »
I wanted to add a form to take payments to my payment page. I decided to user Gravity Forms. I am pleased with the result. I wanted my form to take either a payment amount that I set or to allow the user to enter the amount they would like to pay. I wanted the
For those of you who have been programming in PHP much at all, you will be familiar with the $_GET and $_POST variables that can be passed to your scripts. You may not be as familiar with the $_SERVER variable that gives you information about your host environment. I often use the $_SERVER variable to
PHP's Built-in Server Variables Read More »
I have been programming in PHP much longer than I’ve been programming in Javascript. As a matter of fact, I really haven’t programmed much in Javascript at all. I’ve copied and pasted a lot of snippets from the web and I’ve tweaked things and made a few small functions, but I’ve never done much on
How to Add Numbers in Javascript Read More »
