Question

Basically I have a code:

 $response = myFunction();

I need to repeat this call if there was an error like this:

do {
   $response = myFunction();

} while ( isset($response['error']) );

But I want to usleep(500); too if there was an error. I could do like this, but I don’t find it so elegant:

do {
   $response = myFunction();

   if (isset($response['error']))
     usleep(500);

} while ( isset($response['error']) );

What Can i do? Maybe something like this (not very elegant neither)

while( isset($response['error']) && !usleep(500) );

Edit

There is another possibility… With the use of goto. But I am always reluctant to goto codes

retry:
$response = myFunction();
if (isset($response['error'])) {
  usleep(500);
  goto retry;
}

To me this seems the most clear and redundancy-free solution. What do you think?

Answer 1

while (true) {
    $response = myFunction();

    if (isset($response['error'])) {
        usleep(500);
    } else {
        break;
    }
}

Having said that, trying to hammer a function until it returns the correct result may be a sign of a badly thought-out architecture and there may be a better solution for the whole problem to begin with.