Sound Difficult? No, it's very simple indeed, so let's get started...
in this case we will be using a TMemo to contain the data that will be sent in the HTTP Request. so, go ahead and Drop a TButton and a TMemo on your form.
Nextly, you will need to upload a textfile to a PHP Hosting website. it doesn't matter which one, but it is VERY important that it does host PHP. i will be using: hyperphp.com for this tutorial.
once you have uploaded the textfile, remember the name of it. and upload a new PHP file with the following data:
note, that my php file, is called "index.php" and is uploaded to the root folder, but this doesn't matter but depending on where it is uploaded, and what it is named, the following code may slightly differ for you. also note that the textfile is called "data.txt" and is in the same folder.