PHP pthreads can't kill thread (& timeout realization) - php

Question

I have an example code. What it does is visiting pages. I want to make timeout for thread execution and shut it down when it hangs too long. I thought that there is built-in methods to implement that. Also, i've tried to do it by my own with time() function. But there is another problem. At this point $workers[$i]->kill(); script hangs and kill() method returns false so i can't shutdown thread by force. What is happening and what am i doing wrong?
Thank you!
<?php
/**
* Author: Abu Ashraf Masnun
* URL: http://masnun.me
*/
//define("TMT",3);
class WorkerThreads extends Thread
{
private $workerId;
public function __construct($string)
{
$this->command_string = trim($string);
}
public function run()
{
echo $this->command_string." ".Thread::getCurrentThreadId()."\n";
//sleep(rand(0, 3));
$str = "C:\\Users\\Alex\\Desktop\\2web\\phantom\\phantomjs.exe C:\\Users\\Alex\\Desktop\\2web\\test.js ";
$url = $this->command_string;
$d = explode("://",$url);
$ex_str = $str." ".$url." > ".$d[1].".html";
//$ex_str = $str." ".$url;
//echo $ex_str;
//$ex_str = escapeshellarg($ex_str);
//echo $ex_str;
exec($ex_str, $out);
//print_r($out);
}
}
//$data = file('sites.txt');
$data_f = file('sites_x.txt');
print_r($data_f);
$data = array();
$data_size = count($data_f);
for($i = 0;$i<$data_size;$i++)
{
$info = explode(";",trim($data_f[$i]));
if($info[1] === 'y')
continue;
$data[] = $info[0];
}
print_r($data);
$data_size = count($data);
// Worker pool
$workers = [];
$t_count = 4;
$flag = 1;
$k = 0;
//echo "$data_size";
while($flag === 1)
{
/*
//echo "$k\n";
if($k >= $data_size)
{
//echo "111"; exit();
$flag = 0;
break 2;
}
*/
$c_w = count($workers);
if($c_w < $t_count)
{
for($i = $c_w; $i<$t_count - $c_w;$i++)
{
if($k >= $data_size)
{
$flag = 0;
break;
}
$workers[$i] = new WorkerThreads($data[$k]);
//echo $data[$k]."\n";
echo "worker $i started\n";
$workers[$i]->start();
$k++;
}
}
$c_w = count($workers);
for($i=0;$i<$c_w;$i++)
{
$workers[$i]->kill();
unset($workers[$i]);
echo "unset $i\n";
//var_dump($workers[$i]->isTerminated(), $workers[$i]->getTerminationInfo());
/*
if($workers[$i]->join())
{
//var_dump($workers[$i]->isTerminated(), $my->getTerminationInfo());
echo "joining $i\n";
unset($workers[$i]);
}
*/
}
}
?>

Answer 1

I ran into this problem today with pthreads 2.0.10.
After recompiling PHP from source to get ZTS support, I tried building pthreads (phpize, configure, make). Everything seemed OK until I ran make test. killed-info test failed after a 30 second timeout.
Solution for me was to compile the latest pthreads from the master branch on github.