What are some common pitfalls to avoid when working with PHP variables?

One common pitfall to avoid when working with PHP variables is using uninitialized variables, which can lead to unexpected behavior or errors in your code. To solve this issue, always make sure to initialize your variables before using them.

// Avoid uninitialized variables
$name; // uninitialized variable

// Initialize the variable before using it
$name = "John";
echo $name;