for loop - PHP sleep delay

Question

In PHP, I want to put a number of second delay on each iteration of the loop.

for ($i=0; $i <= 10; $i++) {
    $file_exists=file_exists($location.$filename);
    if($file_exists) {
        break;
    }

    //sleep for 3 seconds
}

How can I do this?

Answer 1

Use PHP sleep() function. http://php.net/manual/en/function.sleep.php This stops execution of next loop for the given number of seconds. So something like this

for ($i=0; $i <= 10; $i++) {
    $file_exists=file_exists($location.$filename);
    if($file_exists) {
        break;
    }
    sleep(3); // this should halt for 3 seconds for every loop
}