PHP to determine Linux program problems

Sometimes when you write some scripts on the server, you often have to put them in crontab and run them regularly. Long time, there is a problem, that is, the program repeatedly run consumes too much resources, how to deal with it? There are two ways to write the following jade. Original address: http://www.pooy.net/php-linux-grep.html Jade (Pooy) Blog Www.pooy.net Welcome to exchange, discussion! Sometimes when you write some scripts on the server, you often have to put them in crontab and run them regularly. Long time has a problem, that is, the program is repeated transport//line consumes too much resources, how to deal with it? Here are two ways to write the Jade: The first: using regular matches in Linux function Ifrun ($clsname, $BF = 0) { The following detects that if a process is running, it does 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; } } } Call: if (Ifrun (' Pooy ', 5)) { Die ("Pooy is running"); } Note: Pooy is the name of the program pooy.php! The second type: write the process to the file, then use the file function to read and then 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 is running"; Exit (); }else { echo "start__________________________________________________"; } Note: "Www/pooy" is a string contained within the program! is the PHP program running much smoother on Linux now? Download Address: http://www.pooy.net/php-linux-grep.html Copy Code

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