我需要建立一个PHP队列系统,找到了这篇绝妙的文章,并使用它创建了一个PHP队列系统,非常容易设置和使用。http://squirrelshaterobots.com/programming/php/building-a-queue-server-in-php-part-1-understanding-the-project
以下是queue.php的代码,从shell(puTTy或类似工具)运行。
<?PHP
//. set this constant to false if we ever need to debug
//. the application in a terminal.
define('QUEUESERVER_FORK', true);
//////// fork into a background process ////////
if(QUEUESERVER_FORK){
$pid = pcntl_fork();
if($pid === -1) die('error: unable to fork.');
else if($pid) exit(0);
posix_setsid();
sleep(1);
ob_start();
}
$queue = array();
//////// setup our named pipe ////////
$pipefile = '/tmp/queueserver-input';
if(file_exists($pipefile))
if(!unlink($pipefile))
die('unable to remove stale file');
umask(0);
if(!posix_mkfifo($pipefile, 0666))
die('unable to create named pipe');
$pipe = fopen($pipefile,'r+');
if(!$pipe) die('unable to open the named pipe');
stream_set_blocking($pipe, false);
//////// process the queue ////////
while(1){
while($input = trim(fgets($pipe))){
stream_set_blocking($pipe, false);
$queue[] = $input;
}
$job = current($queue);
$jobkey = key($queue);
if($job){
echo 'processing job ', $job, PHP_EOL;
process($job);
next($queue);
unset($job, $queue[$jobkey]);
}else{
echo 'no jobs to do - waiting...', PHP_EOL;
stream_set_blocking($pipe, true);
}
if(QUEUESERVER_FORK) ob_clean();
}
?>
最难的部分是让pcntl函数在我的服务器上正常工作。
我的问题是“如果/当服务器必须重新启动,如何使作业自动启动?”
如评论中所述,编辑了破损链接并为后世指向了极好的Web存档。