PHP's questions about implementing multithreading

I want to implement a function in PHP about multithreading. Read multiple data entries from the database first. Then execute the specified function based on an item in the data. Because the algorithm is cumbersome and takes a long time, I want to submit it to the background for processing. But I don't know how to implement it. For example, $ a = newData (& quot; a & quot; PHP's questions about multithreading
I want to implement a function. Read multiple data entries from the database first.

Then execute the specified function based on an item in the data.

Because the algorithm is cumbersome and takes a long time, I want to submit it to the background for processing. But I don't know how to implement it.

For example

$ A = new Data ("");
$ B = new Data ("B ");
I want to directly jump to the execution of the $ B request after sending the $ a request, and so on.
Instead of waiting for the $ a request to complete before the next $ B ..

Is there any good way? The Data function contains multiple parameters ..

------ Solution --------------------
You can create a new php program file, such as runOnBackground. php.
Then, the displayed program is also responsible for asynchronous requests to runOnBackground. php
You can use fsockopen () or socket functions to send asynchronous requests, so that you do not have to wait for the return value. For complex computing on the runOnBackground. php page, you can also submit some parameters.

As for multi-process, it can be used to run in cgi mode and enable pcntl extension in linux, but it is far more complex than the above method.
------ Solution --------------------
The fsockopen example is used in the manual. you only need the code to initiate the request:
$ Fp = fsockopen ("www.example.com", 80, $ errno, $ errstr, 30 );
If (! $ Fp ){
Echo "$ errstr ($ errno)
\ N ";
} Else {
$ Out = "GET/runOnBackground. php? Id = 1 & mode = hello HTTP/1.1 \ r \ n ";
$ Out. = "Host: www.example.com \ r \ n ";
$ Out. = "Connection: Close \ r \ n ";
Fwrite ($ fp, $ out );
}
// Disconnected
Fclose ($ fp );

In runOnBackground. php, you can GET the parameter through $ _ GET ['id'] $ _ GET ['mode '].