我正在同时运行4个线程。（在这种情况下，线程同时运行work()函数）
global $i;
$i = 1;
function work($address) {
while($i < 1000) {
$i++;
----
if($i == something) some job...
----
}
}
出于某种原因，这不起作用。线程有时会在while中执行相同的循环，所以我稍后会有一些重复的值。（可能他们有一些关键部分）知道怎么解决这个问题吗？
计数器对象必须是线程安全的，它还必须使用同步方法。
以下是此类代码的示例：
<?php
class Counter extends Threaded {
public function __construct($value = 0) {
$this->value = $value;
}
/** protected methods are synchronized in pthreads **/
protected function increment() { return ++$this->value; }
protected function decrement() { return --$this->value; }
protected $value;
}
class My extends Thread {
/** all threads share the same counter dependency */
public function __construct(Counter $counter) {
$this->counter = $counter;
}
/** work will execute from job 1 to 1000, and no more, across all threads **/
public function run() {
while (($job = $this->counter->increment()) <= 1000) {
printf("Thread %lu doing job %d'n",
Thread::getCurrentThreadId(), $job);
}
}
protected $counter;
}
$counter = new Counter();
$threads = [];
while (($tid = count($threads)) < 4) {
$threads[$tid] = new My($counter);
$threads[$tid]->start();
}
foreach ($threads as $thread)
$thread->join();
?>
work（）似乎是多余的，这个逻辑很可能应该在：：run函数中。