How can one prevent undefined offset errors when working with arrays in PHP?

Undefined offset errors occur when trying to access an index in an array that does not exist. To prevent these errors, always check if the index exists before trying to access it using isset() or array_key_exists(). This will ensure that the code does not throw an error when accessing non-existent array indexes.

// Check if the index exists before accessing it
if(isset($array[$index])) {
    // Access the array element
    $value = $array[$index];
    // Proceed with further operations
} else {
    // Handle the case when the index does not exist
    echo "Index does not exist in the array";
}