I'm encountering an issue with my PHP code and I could really use some help. I have defined a variable in my code, but for some reason, PHP is throwing an error saying that the variable is undefined. I'm not sure what I'm doing wrong.
Here's a bit of context about my code:
I'm working on a web application that takes user input from a form and processes it. In one particular section of my code, I define a variable called `$username` to store the value entered by the user. Here's the relevant snippet:
// Other code...
$username = $_POST['username'];
// More code...
After this definition, I use the `$username` variable in several places within the same script. However, when I try to run my code, I get the following error message:
Notice: Undefined variable: username in [file path] on line [line number]
I've double-checked the spelling and placement of the variable, and it seems correct. I'm really unsure of what's causing this issue. Can someone please help me figure out why PHP claims my defined variable is undefined?
Any assistance would be greatly appreciated. Thank you in advance!