WP-Mix

Here are some scrap PHP scripts leftover from my work on Dashboard Widgets Suite. These functions were considered specifically for use with the System Information Widget, and provide a variety of details about the current server configuration and software setup.

Disclaimer

Before trying any of these scripts, keep in mind that they may need tweaking in order to support a wider range of servers, software, and scenarios. For example, I develop on Linux machines and never really bother testing anything on Windows. I know, I’m a horrible person.

Also keep in mind that these functions are very bare-bones, and are meant as starting points to get you going with your development efforts. That is, they are great for getting started and generating ideas, not for plug-n-play production deployment.

So with those points in mind, here is a growing collection of functions for getting all sorts of useful server information and data.

Get system load as percentage

This function returns the system load as a percentage:

function shapeSpace_system_load($coreCount = 2, $interval = 1) {
	$rs = sys_getloadavg();
	$interval = $interval >= 1 && 3 <= $interval ? $interval : 1;
	$load = $rs[$interval];
	return round(($load * 100) / $coreCount,2);
}

Note: you can use the next function to pass the number of system cores to this function.

Get the number of system cores

This function returns the number of system cores:

function shapeSpace_system_cores() {
	
    $cmd = "uname";
    $OS = strtolower(trim(shell_exec($cmd)));
 
    switch($OS) {
       case('linux'):
          $cmd = "cat /proc/cpuinfo | grep processor | wc -l";
          break;
       case('freebsd'):
          $cmd = "sysctl -a | grep 'hw.ncpu' | cut -d ':' -f2";
          break;
       default:
          unset($cmd);
    }
 
    if ($cmd != '') {
       $cpuCoreNo = intval(trim(shell_exec($cmd)));
    }
    
    return empty($cpuCoreNo) ? 1 : $cpuCoreNo;
    
}

Get the number of HTTP connections

This function returns the number of PHP connections:

function shapeSpace_http_connections() {
	
	if (function_exists('exec')) {
		
		$www_total_count = 0;
		@exec ('netstat -an | egrep \':80|:443\' | awk \'{print $5}\' | grep -v \':::\*\' |  grep -v \'0.0.0.0\'', $results);
		
		foreach ($results as $result) {
			$array = explode(':', $result);
			$www_total_count ++;
			
			if (preg_match('/^::/', $result)) {
				$ipaddr = $array[3];
			} else {
				$ipaddr = $array[0];
			}
			
			if (!in_array($ipaddr, $unique)) {
				$unique[] = $ipaddr;
				$www_unique_count ++;
			}
		}
		
		unset ($results);
		
		return count($unique);
		
	}
	
}

Get server memory usage

This function returns the server memory usage as a percentage:

function shapeSpace_server_memory_usage() {
 
	$free = shell_exec('free');
	$free = (string)trim($free);
	$free_arr = explode("\n", $free);
	$mem = explode(" ", $free_arr[1]);
	$mem = array_filter($mem);
	$mem = array_merge($mem);
	$memory_usage = $mem[2] / $mem[1] * 100;
 
	return $memory_usage;
	
}

Get current disk usage

This function returns the amount of disk usage as a percentage:

function shapeSpace_disk_usage() {
	
	$disktotal = disk_total_space ('/');
	$diskfree  = disk_free_space  ('/');
	$diskuse   = round (100 - (($diskfree / $disktotal) * 100)) .'%';
	
	return $diskuse;
	
}

Get server uptime

This function returns the server uptime:

function shapeSpace_server_uptime() {
	
	$uptime = floor(preg_replace ('/\.[0-9]+/', '', file_get_contents('/proc/uptime')) / 86400);
	
	return $uptime;
	
}

Get the kernel version

This function returns the kernel version:

function shapeSpace_kernel_version() {
	
	$kernel = explode(' ', file_get_contents('/proc/version'));
	$kernel = $kernel[2];
	
	return $kernel;
	
}

Get the number of processes

This function returns the number of running processes:

function shapeSpace_number_processes() {
	
	$proc_count = 0;
	$dh = opendir('/proc');
	
	while ($dir = readdir($dh)) {
		if (is_dir('/proc/' . $dir)) {
			if (preg_match('/^[0-9]+$/', $dir)) {
				$proc_count ++;
			}
		}
	}
	
	return $proc_count;
	
}

Get current memory usage

This function returns the current memory usage:

function shapeSpace_memory_usage() {
	
	$mem = memory_get_usage(true);
	
	if ($mem < 1024) {
		
		$$memory = $mem .' B'; 
		
	} elseif ($mem < 1048576) {
		
		$memory = round($mem / 1024, 2) .' KB';
		
	} else {
		
		$memory = round($mem / 1048576, 2) .' MB';
		
	}
	
	return $memory;
	
}