How can variables be properly defined and used in PHP scripts to avoid errors?
To properly define and use variables in PHP scripts to avoid errors, it is important to follow proper naming conventions, initialize variables before using them, and ensure that variables are of the correct data type when assigning values to them.
// Example of properly defining and using variables in PHP
// Define variables with proper naming conventions
$firstName = "John";
$lastName = "Doe";
$age = 30;
// Initialize variables before using them
$total = 0;
// Ensure correct data type when assigning values to variables
$total = $age + 10;
// Output the result
echo "Total age after adding 10 years: " . $total;