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PHP Async Execution

The scenario is as follows:

A call to the specified URL, including the Id famous SearchDefinition , should create a new Search entry in db and return a new Search.Id .

Before returning Id I need to start a new process / start asynchronous execution of a PHP file that accepts a new Search.Id and performs a search.

The user interface then checks the third PHP script to get the search status (the 2nd script continues to update the search entry in Db).

This creates a problem with creating a second PHP script in an asynchronous way.

I'm going to run this on a third-party server, so you have little control over permissions. Thus, I would prefer to avoid setting a cron / similar poll for new search entries (and I don't really like polling if I can avoid it). I'm not a big fan of using a web server to work, which is not related to the website, but to avoid permission problems that may be required.

This seems to leave me 2 options:

  • Calling the 1st script returns the identifier and closes the connection, but continues execution and actually does the search (for example, stick script 2 at the end of script 1, but closes the response at the point of addition)
  • Run the second PHP script asynchronously.

I am not sure how one of the above could be done. The first one still feels disgusting.

If you need to use CURL or a similar fake web call, I will do it, but I was hoping for some convenient multi-threaded approach, where I just create a new thread and point it to the corresponding function and the permissions will be inherited from the caller (i.e. Web server user).

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2 answers

I would prefer to use option 1. It will also maintain close functionality closer to each other. Here's a tip on how to send something to the user, and then close the connection and continue execution:

(by tom ********* in gmail dot com, source: http://www.php.net/manual/en/features.connection-handling.php#93441 )

 <?php ob_end_clean(); header("Connection: close\r\n"); header("Content-Encoding: none\r\n"); ignore_user_abort(true); // optional ob_start(); echo ('Text user will see'); $size = ob_get_length(); header("Content-Length: $size"); ob_end_flush(); // Strange behaviour, will not work flush(); // Unless both are called ! ob_end_clean(); //do processing here sleep(5); echo('Text user will never see'); //do some processing ?>
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swoole: asynchronous and parallel extension. https://github.com/matyhtf/swoole

  • event driven
  • full asynchronous non-blocking
  • multi-threaded reactor
  • multiprocessor worker
  • millisecond timer
  • async mysql
  • async task
  • asynchronous read / write system
  • search async dns
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