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PHP implements multi-process parallel operation (can be used as a daemon process)

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Release: 2016-07-25 09:01:30
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PHP simply implements multi-process parallel processing. The child process is responsible for processing things. The parent process can control the number of child processes and is implemented with pcntl extension (Note: This effect cannot be achieved under Windows)                                                      
                                                                                                                                                                                                                                                                                                    



/**
* Entry function
* Save this file as ProcessOpera.php
    * Run /usr/local/php/bin/php ProcessOpera.php &
  1. in terminal*/
  2. ProcessOpera("runCode", array(), 8);
  3. /**
  4. * run Code
  5. */
  6. function runCode($opt = array()) {
  7. //Code that needs to be run in the daemon process
  8. }
  9. /**
  10. * $func is the function name of the child process to perform specific things
  11. * $opt is the parameter of $func in array form
  12. * $pNum is the number of child processes for fork
  13. */
  14. function ProcessOpera($func, $opts = array(), $pNum = 1) {
  15. while(true) {
  16. $pid = pcntl_fork();
  17. if($pid == -1) {
  18. exit("pid fork error");
  19. if($pid) {
  20. static $execute = 0;
  21.               $execute++;
  22.                                                                                        ($execute > while(true) {
  23.                                                                                                                                                                                           1),
source:php.cn
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