How can the error related to the hostname resolution be fixed in the PHP code?

When encountering an error related to hostname resolution in PHP, it typically means that the DNS lookup for the specified hostname failed. To fix this issue, you can try using the `gethostbyname()` function to retrieve the IP address associated with the hostname. This can help ensure that the hostname is resolved correctly before proceeding with any network operations.

$hostname = "example.com";
$ip_address = gethostbyname($hostname);

// Now you can use the $ip_address for any network operations
echo "IP address for $hostname is: $ip_address";