Example of using php to guard another php process _ PHP Tutorial

Example of using php to guard another php process. An example of using php to guard another php process is to use php to guard another php process (except for running the apache module and nginx). php needs to guard B. php in B. example of using php to guard another php process through getmy in php

Use php to guard another php process (except for running the apache module and nginx)

A. php should guard B. php

In B. php, use the getmypid () function to obtain the id of the current process and write the id to the c. pid file. if the program is executed, delete or clear the c. pid file.

In. verify c. whether the pid exists and is empty. if not, read the pid and execute ps-p pid | grep file name through exec to determine whether the pid is running. then, execute the corresponding operation.

Someone may ask why the ps aux | grep file name is not directly used. this is mainly because the file name is duplicated.

A. php code

The code is as follows:

$ Id = intval ($ argv [1]);
If (! File_exists ('pid '. $ id.'. pid ')){
Echo "not run ";
Exit;
}
$ Content = file_get_contents ('pid '. $ id.'. pid ');
If (empty ($ content )){
Echo "not run ";
Exit;
}
Exec ("ps p". $ content. '| grep B. php', $ pids );
If (count ($ pids)> 0) echo ('runing ');
Else {echo 'not run ';}
?>

B. php code

The code is as follows:

$ Id = intval ($ argv [1]);
If (empty ($ id) exit;
File_put_contents ('pid '. $ id.'. pid ', getmypid ());
While (1 ){
File_put_contents ('pid '. $ id.'. pid ', getmypid ());
Sleep (100 );
}
?>

Ghost uses php to guard another php process (except for running the apache module and nginx). a. php should guard B. php through getmy...