Linux System Resources PHP implementation

top.php

#!/usr/bin/php
<?php
$sleep_militime=150000;
class top_info{

	private static function top_command(){
		exec("/usr/bin/top -b -n1",$out);
		return $out;
	}

	private static function debug_time(){
		return microtime(true);
	}

	private static function convert_from_kbyte($byteSize) {
		$bytes = (float)str_replace(".",",",$byteSize);
		$sizes = array('KB', 'MB', 'GB', 'TB', 'PB');
		$factor = floor((strlen($bytes) - 1) / 3);
		$size = sprintf('%.2f', $bytes / pow(1024, $factor)) ." ".$sizes[$factor];
	return $size;
	}

	private static function gorev_say($line){
		preg_match('/Tasks:([\s+]\d+)/i',$line,$gorev);
		return $gorev[1];
	}
	
	private static function ram_info($line){
		preg_match('/KiB Mem:.\s+(\d+)\s+total,\s+(\d+)\s+used,\s+(\d+)\s+free/i',$line,$hafiza);
		return $hafiza;
	}

	private static function ram_total($total){
		return self::convert_from_kbyte($total);
	}

	private static function ram_used($total){
		exec("ps aux | awk '{sum +=$4}; END {print sum}'",$out);
		return self::convert_from_kbyte($out[0]*$total/100);
	}

	private static function ram_free($total){
		exec("ps aux | awk '{sum +=$4}; END {print sum}'",$out);
		return self::convert_from_kbyte((100-$out[0])*$total/100);
		//~ return self::convert_from_kbyte($free*$total/100);
	}

	private static function top_ten_app(){
		exec("ps -A --sort -rss -o comm,pmem,rss | head -n 21",$out);
		return $out;
	}

	private function cpu_stat(){
		exec("lscpu | grep -i 'CPU(s):'",$core);
		preg_match("/\d/",$core[0],$match);
		$core=implode("",$match);
		for($i=0;$i<$core;$i++){
			//~ echo "cpu$i\n";
			exec("grep 'cpu".$i."' /proc/stat | awk '{usertime=($2-$10)} {nicetime=($3-$11)} {idlealltime=($5+$6)} {systemalltime=($4+$7+$8)} {steal=($9)} {virtalltime=($10+$11)} {using=(usertime+nicetime+systemalltime+steal+virtalltime)} {totaltime=(using+idlealltime)} END {print using,idlealltime,totaltime }'",$cpu);
			$cpu_usage=explode(" ",$cpu[0]);
			$return[$i]=array();
			$return[$i][]=$cpu_usage[0]; // using
			$return[$i][]=$cpu_usage[1]; // idle all time
			$return[$i][]=$cpu_usage[2]; // total time
		}
		return $return;
		//~ print_r($return);
		//~ die;
	}

	private static function usage_info($sleep){
		$return=array();
		$top_out=self::top_command();
		//~ Görev Sayısı
		$return[]=self::gorev_say($top_out[1]);
		//~ Ram Kullanımı
		$ram_info=self::ram_info($top_out[3]);
		$return[]=self::ram_total($ram_info[1]);
		//~ $return[]=self::ram_using($ram_info[2]);
		$return[]=self::ram_used($ram_info[1]);
		$return[]=self::ram_free($ram_info[1]);
		//~ CPU Kullanımı
		exec("lscpu | grep -i 'CPU(s):'",$core);
		preg_match("/\d/",$core[0],$match);
		$core=implode("",$match);		
		for($i=0;$i<$core;$i++){
			$cpu_first=self::cpu_stat();
				usleep($sleep);
			$cpu_second=self::cpu_stat();
			
			$idled[$i]=$cpu_second[$i][1] - $cpu_first[$i][1];
			$totald[$i]=$cpu_second[$i][2] - $cpu_first[$i][2];
			$cpu[$i]=round(($totald[$i]-$idled[$i])*100/$totald[$i],4);
		}
		$return[]=$cpu;
		$return[]=self::top_ten_app();
		return $return;
	}
	
	public static function show_usage($sleep){
		
		$begin=self::debug_time();
		$usage=self::usage_info($sleep); // Bu fonksiyonun oluşturulma amacı istenildiğinde parçalı okuma gerçekleştirmek, yoksa usage_info() tüm işi yapmakta.
		$end=self::debug_time();
		echo "Hesaplama Süresi : ".round($end-$begin,4)."\n";
		echo "Hesaplama Süresi 1 den Büyükse scriptin başındaki \$sleep_militime değerini küçültün !\n";
		$return=array();
		$return["Toplam Çalışan Görev"]=$usage[0];
		$return["Toplam Hafıza"]=$usage[1];
		$return["Kullanılan Hafıza"]=$usage[2];
		$return["Boştaki Hafıza"]=$usage[3];
		$return["Cpu Kullanımı"]="\n\t\t\t% ".implode("\n\t\t\t% ",$usage[4]);
		//~ unset($usage[5][0]);
		$return["Top 10 Uygulama"]=$usage[5];
		return $return;
	}
}
//~ function izle(){
	//~ global $sleep_militime;
	//~ $usage=top_info::show_usage($sleep_militime);
	//~ print_r($usage);
	//~ file_put_contents("/home/yasin/sh/top.txt",print_r($usage,1));
	//~ usleep(200000);
	//~ izle();
//~ }
//~ izle();

	$usage=top_info::show_usage($sleep_militime);
	print_r($usage);
?>