Constants are similar to variables except that once they are defined they cannot be changed or undefined. A constant is an identifier (name) for a simple value. The value cannot be changed during the ...

PHP is an acronym for "PHP: Hypertext Preprocessor". PHP is a widely-used, open source scripting language. PHP scripts are executed on the server. PHP is free to download and use. PHP is a powerful ...

You can easily add Internet-based control for your Arduino if it is close enough to your server to be connected via USB. This tutorial will give the basics you need to get it working. The gist of this ...

I've got a bunch of $_POST values being brought over from a form. Many of these values are from checkboxes, with the form names all starting with 'field_'. These signify the columns in a chart that ...