In PHP scripts with multiple variable combinations, what strategies can be implemented to avoid errors when navigating between results?

When navigating between results in PHP scripts with multiple variable combinations, it is important to check for the existence of variables before accessing them to avoid errors. One strategy to implement is using conditional statements, such as isset() or empty(), to verify if a variable is set before using it. This helps ensure that the script does not encounter undefined variable errors when navigating between different results.

// Check if the variable is set before accessing it
if(isset($variable)){
    // Use the variable here
    echo $variable;
} else {
    // Handle the case when the variable is not set
    echo "Variable is not set";
}