Sometimes when writing some scripts on the server, it is often put into crontab to run regularly. There is a problem over time, that is, the program is repeatedly running and consumes too much resources. How to deal with it? I wrote two methods below:
The first type: use regular matching in linux
Copy the codeThe code is as follows:
function ifrun($clsname,$bf = 0)
{
//Check the following. If a process is 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;
}
}
}
Called:
Copy the codeThe code is as follows:
if (ifrun('pooy',5)) { die("pooy is running"); }
Note: pooy is the name of the program!
The second type: write the process into a file, then use the file function to read and match the string
Copy the codeThe code is as follows:
system('ps -ef |grep wget > /root/');
$arr=file('/root/');
$total=count($arr);
for($i=0;$i<$total;$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 a string contained in the program!
Is the PHP program running on Linux now much smoother?