What are the best practices for handling unique IDs in PHP code?

When handling unique IDs in PHP code, it is important to ensure that the IDs generated are truly unique to avoid conflicts and data integrity issues. One common practice is to use UUIDs (Universally Unique Identifiers) to generate unique IDs. This can be achieved using the `uniqid()` function in PHP, which generates a unique identifier based on the current time in microseconds.

// Generate a unique ID using uniqid()
$unique_id = uniqid();
echo $unique_id;