serverinfo.php

<?php
/**
 * @package serverinfo
 */
class modDashboardWidgetServerInfo extends modDashboardWidgetInterface {

	public function render() {

		$output = '';
		$values = array();

		$section = 'PHP';
		$values[$section][] = array('infoname' => 'PHP Version', 'info' => phpversion());

		$section = 'Cache';
		$values[$section][] = array('infoname' => 'APC available?', 'info' => extension_loaded('apc'));
		$values[$section][] = array('infoname' => 'Memcache available?', 'info' => extension_loaded('memcached'));
		$values[$section][] = array('infoname' => 'Cache handler in use', 'info' => $this->modx->getOption('cache_handler'));
		$values[$section][] = array('infoname' => 'SQL queries cached?', 'info' => $this->modx->getOption('cache_db'));

		$section = 'htaccess';
		$values[$section][] = array('infoname' => 'Core Path', 'info' => $this->modx->getOption('base_path'));
		$values[$section][] = array('infoname' => '.htaccess active?', 'info' => $this->checkhtaccess('exists'));
		$values[$section][] = array('infoname' => 'mod_rewrite enabled?', 'info' => $this->checkhtaccess('rewrite'));

		ksort($values);
		#return var_dump($values);

		while (list ($key, $val) = each ($values) ) {
		  $output .= '<tr><td colspan="2"><strong>'.$key.'</strong></td></tr>';
		  $i=0;
		  while (list ($key2, $val2 ) = each ($val) ) {
		   $output .= $this->modx->getChunk('tplServerinfo', $val[$i]); 
			$i++;
		  }
		}

		return '<table>'.$output.'</table>';
	}

	private function checkhtaccess($mode) {
		$handle = fopen($this->modx->getOption('base_path').'.htaccess', 'r');
		switch ($mode) {
		  case 'exists':
			if ($handle) {
			  return 'yes';
			}
			else {
			  return false;
			}
		  case 'rewrite':
			$content = file_get_contents($handle);
			# here: scan for line that activates mod rewrite
			return $content;
		  default:
			return false;
		}
		fclose($handle);
	}
}

return 'modDashboardWidgetServerInfo';