PHP code to get linux server status

Example, PHP code to get Linux server status.

function get_used_status(){
$fp = popen('top -b -n 2 | grep -E "^(Cpu|Mem|Tasks)"',"r"); //Get the system cpu and memory usage at a certain moment
$rs = "";
while(!feof($fp)){
 $rs .= fread($fp,1024);
}
pclose($fp );
$sys_info = explode("n",$rs);
$tast_info = explode(",",$sys_info[3]);//Process array
$cpu_info = explode(",",$sys_info[ 4]); //CPU occupancy array
$mem_info = explode(",",$sys_info[5]); //Memory occupancy array
//Number of running processes
$tast_running = trim(trim($ taste_info[1],'running'));
//CPU usage
$cpu_usage = trim(trim($cpu_info[0],'Cpu(s): '),'%us'); //Percentage< ;/p>
//Memory occupancy
$mem_total = trim(trim($mem_info[0],'Mem: '),'k total');
$mem_used = trim($mem_info[1 ],'k used');
$mem_usage = round(100*intval($mem_used)/intval($mem_total),2); //Percent

/*hard disk usage begin*/
$fp = popen( 'df -lh | grep -E "^(/)"',"r");
$rs = fread($fp,1024);
pclose($fp);
$rs = preg_replace("/s{ 2,}/",' ',$rs); //Replace multiple spaces with "_"
$hd = explode(" ",$rs);
$hd_avail = trim($hd[3],' G'); //Disk available space size unit G
$hd_usage = trim($hd[4],'%'); //Mount point percentage
//print_r($hd);
/*Hard disk usage end*/
//Detection time
$fp = popen("date +"%Y-%m-%d %H:%M"","r");
$ rs = fread($fp,1024);
pclose($fp);
$detection_time = trim($rs);
/*Get IP address begin*/
/*
$ fp = popen('ifconfig eth0 | grep -E "(inet addr)"','r');
$rs = fread($fp,1024);
pclose($fp);
$rs = preg_replace(" /s{2,}/",' ',trim($rs)); //Replace multiple spaces with "_"
$rs = explode(" ",$rs);
$ip = trim($ rs[1],'addr:');
*/
/*Get IP addressend*/
/*
$file_name = "/tmp/data.txt"; // Absolute path: homedata.dat
$file_pointer = fopen($file_name, "a+"); // "w" is a mode, see below for details
fwrite($file_pointer,$ip); // First cut the file to 0 bytes, then write
fclose($file_pointer); // End
*/
return array('cpu_usage'=>$cpu_usage,'mem_usage'=>$mem_usage,'hd_avail'=> $hd_avail,'hd_usage'=>