How can "Undefined offset" errors in PHP scripts be resolved?

"Undefined offset" errors in PHP scripts occur when trying to access an array element that does not exist at a specific index. To resolve this issue, you can first check if the index exists using isset() or array_key_exists() functions before accessing it to avoid the error. Example PHP code snippet:

$array = [1, 2, 3, 4, 5];

$index = 5;

if (isset($array[$index])) {
    // Access the array element at the specified index
    echo $array[$index];
} else {
    // Handle the case when the index is undefined
    echo "Index is undefined";
}