pcntl_fork questions

Collapse
This topic is closed.
X
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • yawnmoth
    #1

    pcntl_fork questions

    php.net's docs on pcntl_fork aren't exactly clear on how to spawn
    multiple child processes...

    i tried something like this, but it didn't seem to work:

    <?
    $pid1 = pcntl_fork();
    $pid2 = pcntl_fork();
    $pid3 = pcntl_fork();
    if ($pid1)
    print "test;
    if ($pid2)
    print "test2";
    if ($pid3)
    print "test3";
    ?>

    any ideas why it didn't work? any ideas as to what i should be doing,
    instead? thanks :)
    Tags: None
    • Kevin Thorpe
      #2
      Re: pcntl_fork questions

      yawnmoth wrote:
      [color=blue]
      > php.net's docs on pcntl_fork aren't exactly clear on how to spawn
      > multiple child processes...
      >
      > i tried something like this, but it didn't seem to work:
      >
      > <?
      > $pid1 = pcntl_fork();
      > $pid2 = pcntl_fork();
      > $pid3 = pcntl_fork();
      > if ($pid1)
      > print "test;
      > if ($pid2)
      > print "test2";
      > if ($pid3)
      > print "test3";
      > ?>
      >
      > any ideas why it didn't work? any ideas as to what i should be doing,
      > instead? thanks :)[/color]

      Assuming things work the same as in perl......

      When you call $pid=pcntl_fork () you end up with two versions of your
      script running. The original script will have $pid set to the child
      process id, the child will have $pid set to false. The example in the
      documentation explains it.

      <?php

      $pid = pcntl_fork();
      if ($pid == -1) {
      die("could not fork");
      } else if ($pid) {
      // we are the parent
      } else {
      // we are the child
      }

      ?>

        Comment

        • yawnmoth
          #3
          Re: pcntl_fork questions

          Kevin Thorpe <kevin@pricetra k.com> wrote in message news:<406bebd3$ 0$8577$afc38c87 @news.easynet.c o.uk>...
          <snip>
          [color=blue]
          >
          > Assuming things work the same as in perl......
          >
          > When you call $pid=pcntl_fork () you end up with two versions of your
          > script running. The original script will have $pid set to the child
          > process id, the child will have $pid set to false. The example in the
          > documentation explains it.
          >
          > <?php
          >
          > $pid = pcntl_fork();
          > if ($pid == -1) {
          > die("could not fork");
          > } else if ($pid) {
          > // we are the parent
          > } else {
          > // we are the child
          > }
          >
          > ?>[/color]

          that makes since...

          on a related note, the php docs say not to use the process control
          functions on a webserver... why would this be, and is there anything
          i could do to alievate whatever negative consequence could happen as a
          result?

          the thing is... i want to write a script to test whether or not some
          tcpip address is a public proxy. my plan is to have it do this by
          attempting to use the tcpip address as such. however, i don't want to
          have to do one after the other, because that'd take more time than i'd
          want anyone to have to wait...

          i'd like to do the connections simultaniously, if i can... i just
          don't know exactly how... is using the process control functions
          would be a bad idea, what else could i use?

            Comment

            Previous template Next
            Working...