For example:
//test.php
#! /usr/local/php/bin/php
<?php
exec('nohup ./loop.php > loop.out');
echo 'I am a superman!';
//loop.php
#! /usr/local/php/bin/php
<?php
$count = 0;
while (true) {
echo "Loop count:{$count}\n";
$count++;
}
When I run ./test.php I can not get the output 'I am a superman!', as you know loop.php is an endless loop, test.php is interrupted by loop.php, so how can I get the output? Any help is appreciated.
There is a bunch of ways you can achieve this:
Running background process using &:
exec('nohup ./loop.php > loop.out 2>&1 &');
Using pcntl_fork and running your process from child:
$pid = pcntl_fork();
switch ($pid){
case -1:
die('Fork failed');
break;
case 0:
exec('nohup ./loop.php > loop.out');
exit();
default:
break;
}
echo "I'm not really a superman, just a parent process';
There is more ways to do this, just lurk into PHP documentation and questions in php here...
It's never a good idea to have a "never ending" loop running. If you need to have a particular task run frequently, consider using Cron Jobs, provided by the Server OS and not actually part of PHP.
Also, if a section of your PHP code needs a lot of time to execute, you should change your design approach to queue the Job on Database and have an external Job Scheduler process it.
Look at this post for more details.
