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How to determine program running status in PHP

WBOY
WBOYOriginal
2016-07-25 09:13:111642browse

In Linux systems, when running some scripts, they often need to be placed in crontab to run regularly. After a long time, there will be a problem, that is, the repeated running of the program consumes too many resources. How to deal with it?

Written two methods: The first one: Use regular matching in Linux

  1. function ifrun($clsname,$bf = 0)

  2. {
  3. //Detect below, if there is a process running, it will not run
  4. $str=shell_exec("/bin /ps ax > /home/root/".$clsname."_run.txt");
  5. $str=shell_exec("/bin/grep -c '".$clsname.".php' /home/root/ ".$clsname."_run.txt");

  6. if($bf >0)

  7. {
  8. if($str >=$bf)
  9. {
  10. return 1;
  11. }
  12. else
  13. {
  14. return 0;
  15. }
  16. }
  17. else
  18. {
  19. if ($str>=2)
  20. {
  21. return 1;
  22. }
  23. else
  24. {
  25. return 0;
  26. }
  27. }
  28. }
  29. < ;/p>
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Call: if (ifrun('pooy',5)) { die("pooy is running"); } Note: pooy is the name of the program pooy.php!

The second method: write the process into the file, then use the file function to read and match the string

  1. system('ps -ef |grep wget > /root/pooy.txt');

  2. $arr=file('/root/pooy.txt');
  3. $total =count($arr);
  4. for($i=0;$i<$total;$i++){
  5. $count=array();
  6. if(stristr($arr[$i],'www/pooy' ) !== FALSE) {
  7. //echo '"earth" not found in string';
  8. $count[]='no';
  9. break;
  10. }
  11. }

  12. if( count($count) >= 1 )

  13. {
  14. echo "A same programs are running";
  15. exit();
  16. }else
  17. {
  18. echo "start________________________________________________";
  19. }

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Note: "www/pooy" is the string contained in the program!

Now the PHP program will run much more smoothly on Linux.

Editor’s summary: When debugging some simple PHP programs in a Linux system, especially PHP programs that need to be executed regularly, crontab is a good choice. It is similar to the scheduled tasks under Windows, but it is more convenient than under Win. It is recommended that you try it more.



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