How PHP returns to the current state of operation

How PHP returns to its current running state
In a single request to the UI, the PHP response may take several minutes. I want PHP to return some hints to the UI during the response, such as returning "Analysis Indicator 1" in one minute, and two minutes returning to "Analysis Metric 2".
How do you want to do prawns?

------Solution--------------------
Replace multiple requests with code similar to the following

if ($_get[' P ']== ' 1 ') {
Echo ' Action 1 has been processed ';
}else if ($_get[' P ']== ' 2 ') {
Echo ' Action 2 has been processed ';
}

Such a request will not be processed for a long time to see the results soon
------Solution--------------------
Yes, to get the browser's cache full first.
So you're sending out enough data to fill the cache, right?
And it's supposed to be a JS code.

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