pcntl

问题 How can I handle CTRL + C in PHP on the command line? Pcntl_* functions do not work in Windows. 回答1: As of PHP 7.4, this is now possible by registering a handler callback with the sapi_windows_set_ctrl_handler function. This is complemented by the sapi_windows_generate_ctrl_event, which can be used to dispatch signals to other processes attached to the same console as the caller. Only the CTRL-C and CTRL-BREAK events can be handled in user space, the close/logoff/shutdown events cannot be

问题 I have a problem with pcnt_fork I followed this tutorial for installation instalation of pcntl $ mkdir /tmp/phpsource $ cd /tmp/phpsource $ apt-get source php5 $ cd /tmp/phpsource/php5-*/ext/pcntl $ phpize $ ./configure $ make # then copy your module to php5 module-lib path (in my case:) # and create an .ini-file to enable the module for sapi after graceful restart. $ cp /tmp/phpsource/php5-*/modules/pcntl.so /usr/lib/php5/20090626/ $ echo "extension=pcntl.so" > /etc/php5/conf.d/pcntl.ini on

问题 I'm trying to create a daemon process that handles several child threads. But the child thread doesn't seem to send the signal back to the parent to call the function. i have tried to take it out of the class and make it a standard function but that doesn't seem to help either. class Daemon { public function __construct() { $set = pcntl_signal(SIGCHLD, array($this, 'childSignalHandler')); $pid = pcntl_fork(); if ($pid == -1) { echo 'could not fork'; } elseif ($pid) { // parent sleep(20); //

问题 Can anybody tell me why using the pcntl lib on production servers is discouraged? The PHP manual tells very briefly about it, and I'm in a dire need to use this library... Is there another way to do the same thing in php? 回答1: pcntl is discouraged in production environments because the functionality it supports (fork, process control, signal handling) are fairly explicitly things you should not be using in a CGI style application. Now, if you're writing a daemon or command line application in

问题 I'm trying to use pcntl_fork() in php-fpm but it is not available and I get: Call to undefined function pcntl_fork() Even though I've out-commented the disable_functions in the php.ini . phpinfo() shows the author and php -m also lists pcntl . If I'm executing my script from cli, it works. Is there any other option I need to enable? As MWE I've prepared a minimal docker environment at https://github.com/white-gecko/pcntl-mwe resp. docker pull whitegecko/pcntl-mwe if you run it with docker run

问题 With the help from two previous questions, I now have a working HTML scraper that feeds product information into a database. What I am now trying to do is improve efficiently by wrapping my brain around with getting my scraper working with pcntl_fork. If I split my php5-cli script into 10 separate chunks, I improve total runtime by a large factor so I know I am not i/o or cpu bound but just limited by the linear nature of my scraping functions. Using code I've cobbled together from multiple

问题 I have some code like this, and I want to understand how does fork work, but I'm confused with declare(ticks=1) . when I put it in the first line, after the child process finished, the signal handler will be called, which is what I want; but when I remove it, the signal handler will never be called! So, I want to know how does the ticks influence the signal processing. <?php declare(ticks=1); function sigHandler($signal) { echo "a child exited\n"; } pcntl_signal(SIGCHLD, sigHandler, false);

问题 I've install hhvm 3.5 in my CentOs 6.5, and it could be run correctly. But I found when I use pcntl_fork() function to do something. The hhvm will throw an error as Fatal error: forking is disallowed in server mode. It's happened just in nginx + hhvm, in cli mode everything seems alright. Does the pcntl_fork() can only run in cli mode? If not, how to make it alright? 回答1: The error message looks pretty clear to me: you cannot fork in server (i.e., FastCGI) mode. As to why, I can only

问题 I want to stop executing my command from controller action so I tried to use pcntl to achieve this. This is my code(Command): protected $should_stop = false; protected function execute(InputInterface $input, OutputInterface $output) { pcntl_signal(SIGHUP, [$this, 'stopCommand']); foreach($something as $row) { pcntl_signal_dispatch(); if($this->should_stop === true) { break; } ... } } protected function stopCommand() { $this->should_stop = true; } But when I run my command it display error:

问题 I have a simple PHP script that I want to run from the terminal, and be able to process signal codes. The script creates a TCP server and processes connections. Not sure why, but I can't get signal processing to work: <?php declare(ticks = 1); // Register shutdown command. pcntl_signal(SIGINT, function ($sig) { echo 'Exiting with signal: ' . $sig; global $sock; global $client; socket_close($sock); socket_close($client); exit(1); }); $address = '127.0.0.1'; $port = 1234; $sock = socket_create