PHP: Get unique ID inside Docker container

Question

To register with a MQTT service I need a unique client ID inside a Docker container. Does the PHP function uniqid() work for that?

$uniqueId = uniqid();

Or is it better to combine this with the Docker container ID? What is PHP oneliner code for that?

Answer 1

 uniqid ([ string $prefix = "" [, bool $more_entropy = FALSE ]] ) : string

Gets a prefixed unique identifier based on the current time in microseconds.

Caution

This function does not generate cryptographically secure values, and should not be used for cryptographic purposes. If you need a cryptographically secure value, consider using random_int(), random_bytes(), or openssl_random_pseudo_bytes() instead.

If you are using

$id = uniqid (null, true);

You should be totally fine.