How to determine program running status in PHP

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

function ifrun($clsname,$bf = 0)
{
 //Detect below, if there is a process running, it will not run
 $str=shell_exec("/bin /ps ax > /home/root/".$clsname."_run.txt");
 $str=shell_exec("/bin/grep -c '".$clsname.".php' /home/root/ ".$clsname."_run.txt");
 if($bf >0)
 {
 if($str >=$bf)
 {
 return 1;
 }
 else
 {
 return 0;
 }
 }
 else
 {
 if ($str>=2)
 {
 return 1;
 }
 else
 {
 return 0;
 }
 }
}
 < ;/p>

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

system('ps -ef |grep wget > /root/pooy.txt');
$arr=file('/root/pooy.txt');
$total =count($arr);
for($i=0;$i $count=array();
 if(stristr($arr[$i],'www/pooy' ) !== FALSE) {
 //echo '"earth" not found in string';
 $count[]='no';
 break;
 }
}
if( count($count) >= 1 )
{
 echo "A same programs are running";
 exit();
}else
{
 echo "start________________________________________________";
}

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.