How to get the current timestamp in milliseconds using DateTime in PHP?

To get the current timestamp in milliseconds using DateTime in PHP, you can follow these steps:

Create a new instance of the DateTime class using the current time.
Get the current timestamp using the getTimestamp() method.
Multiply the timestamp by 1000 to convert it to milliseconds.

Here's an example code snippet:

// Create a new DateTime instance with the current time
$dateTime = new DateTime();

// Get the current timestamp
$timestamp = $dateTime->getTimestamp();

// Convert the timestamp to milliseconds
$milliseconds = $timestamp * 1000;

// Output the current timestamp in milliseconds
echo $milliseconds;

By following the above steps, you should be able to obtain the current timestamp in milliseconds using DateTime in PHP.