How can error notices such as "Undefined offset" be addressed when manipulating arrays in PHP?

When encountering an "Undefined offset" error while manipulating arrays in PHP, it means that you are trying to access an index in an array that does not exist. To address this issue, you can check if the offset exists in the array before trying to access it using isset() or array_key_exists() functions.

// Example of addressing "Undefined offset" error in PHP
$array = [1, 2, 3, 4, 5];

$index = 5;

if (isset($array[$index])) {
    // Access the element at the specified index
    echo $array[$index];
} else {
    // Handle the case where the offset is undefined
    echo "Offset does not exist in the array.";
}