How to determine program running status in PHP-PHP Tutorial-php.cn

How to determine program running status in PHP

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Release： 2016-07-25 09:13:11

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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>

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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

system('ps -ef |grep wget > /root/pooy.txt');
$arr=file('/root/pooy.txt');
$total =count($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________________________________________________";
}

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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.