How can PHP beginners ensure proper variable handling in function calls to avoid issues like the one mentioned in the thread?

Issue: PHP beginners can ensure proper variable handling in function calls by ensuring that the variables being passed as arguments to functions are properly defined and initialized before the function call. This can help avoid errors such as "Undefined variable" or unexpected behavior due to uninitialized variables. Solution: To ensure proper variable handling in function calls, always initialize variables before using them in function calls. This can be done by assigning default values or checking if the variables are set before passing them as arguments to functions. Here is an example code snippet demonstrating this:

<?php
// Initialize variables
$name = "John";
$age = 25;

// Function that takes two arguments
function greet($name, $age) {
    echo "Hello, my name is " . $name . " and I am " . $age . " years old.";
}

// Check if variables are set before calling the function
if(isset($name) && isset($age)) {
    greet($name, $age);
} else {
    echo "Variables are not properly initialized.";
}
?>