What potential error can occur when using fsockopen() to check website reachability and how can it be handled?

When using fsockopen() to check website reachability, a potential error that can occur is a timeout if the website is unreachable or if the connection takes too long. This can be handled by setting a timeout value for the connection, so that if it exceeds this time, an error can be caught and handled accordingly. 

$host = 'www.example.com';
$port = 80;
$timeout = 5; // Set timeout value to 5 seconds

$fp = @fsockopen($host, $port, $errno, $errstr, $timeout);

if (!$fp) {
    echo "Error: $errstr ($errno)";
} else {
    echo "Website is reachable!";
    fclose($fp);
}

Keywords

fsockopen website reachability error handling network error exception handling

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