improved-reload-handlers

    <!-- start scripts for auto reloading=> -->
    <meta name="previousUpdateStatusList" content="">
    <meta name="monitorList" content="./htdocs/cmtrend_stop.php,./htdocs/style.css,./template/cmtrend_stop.tmpl,./lib/libcommon,./lib/libcable,./lib/libpage,./lib/libcable,./conf/1217141131.00,./conf/1217141131.01,./conf/1217141131.02,./conf/1217141131.03,./conf/1217141131.04,./conf/1217141131.05,./conf/1217141131.06,./conf/1217141131.07,./conf/1217141131.08,./conf/1217141131.09">
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
    <script type="text/javascript">
      var ajaxHandlerPath = 'http://192.168.2.175/~dzakuma/update-monitor.php';
      var ajaxRequest = null;
      var ajaxTimeout = 300000;
       
      function showUpdated(json)
      {
        var updateTime = json.lastUpdated;
        console.log(json);
        var previousUpdateStatusList = json.previousUpdateStatusList;
        var updateTimeList = previousUpdateStatusList.split(',');
        previousUpdateStatusList = previousUpdateStatusList.replace(':updated', '');
        var time = $('meta[name=lastUpdated]').attr('content');
        var updateFlag = 0;
        var currentList = $('meta[name=previousUpdateStatusList]').attr('content').split(',');
        for (var updated = 0; updated < updateTimeList.length; updated++) {
          var current = updateTimeList[updated];
          if (currentList[updated] === '') {
            $('meta[name=previousUpdateStatusList]').attr('content', previousUpdateStatusList);
            break;
          } else if (current.contains('update')) {
            updateFlag = 1;
          }
        }
         
        if (updateFlag) {
          $('meta[name=previousUpdateStatusList]').attr('content', previousUpdateStatusList);
          console.log(' PHP: ' + current);
          console.log('HTML: ' + currentList[updated]);
          location.reload();
        }
      }

      (function pollUpdates(){
        var lastUpdated = $('meta[name=lastUpdated]').attr('content');
        var monitorList = $('meta[name=monitorList]').attr('content');
        var previousUpdateStatusList = $('meta[name=previousUpdateStatusList]').attr('content');
        monitorList = monitorList.split(',');
        previousUpdateStatusList = previousUpdateStatusList.split(',');
        $.ajax({
          url: ajaxHandlerPath,
          type: 'POST',
          data: {
          requestType : '../dynamic.php',
          'monitorList[]' : monitorList,
          'previousUpdateStatusList[]' : previousUpdateStatusList,
          timeout : ajaxTimeout,
          lastUpdated : lastUpdated
          },
          success: showUpdated,
          dataType: 'json',
          complete: pollUpdates,
          timeout: ajaxTimeout
        });
      })();
    </script>
    <!-- <=end scripts for auto reloading -->

<?php
#===========================================================
# [author]
# Dodzi Y. Dzakuma
# [summary]
# This function checks if a superglobal parameter is set in
# specified superglobal. If no superglobal is specified this
# function will check the $_REQUEST superglobal by default.
# [parameters]
# 1) parameter name to check
# 2) value to return if not set (optional)
# 3) name of superglobal array to search (optional)
# [return]
# 1) the value of spefcified parameter
# 2) the default value if specified parameter doesn't exist
# 3) null if no default value spcified
#===========================================================
function checkRequest(
	$variableName, 
	$defaultValue = null, 
	$functionName = ""
) {
	$superglobalArray = null;
	if (stripos($functionName, "get") !== false) {
		$superglobalArray = &$_GET;
	} else if (stripos($functionName, "files") !== false) {
		$superglobalArray = &$_FILES;
		if(empty($superglobalArray[$variableName]["tmp_name"])) {
			return $defaultValue;
		}
	} else if (stripos($functionName, "post") !== false) {
		$superglobalArray = &$_POST;
	} else if (stripos($functionName, "cookie") !== false) {
		$superglobalArray = &$_COOKIE;
	} else if (stripos($functionName, "session") !== false) {
		$superglobalArray = &$_SESSION;
	} else{
		$superglobalArray = &$_REQUEST;
	}

	#
	if (!isset($superglobalArray[$variableName])) {
		return $defaultValue;
	}
	return $superglobalArray[$variableName];
}


function checkCookie($variableName, $defaultValue = "") {
	return checkRequest($variableName, $defaultValue, __FUNCTION__);
}

function checkPost($variableName, $defaultValue = "") {
	return checkRequest($variableName, $defaultValue, __FUNCTION__);
}

function checkFiles($variableName, $defaultValue = "") {
	return checkRequest($variableName, $defaultValue, __FUNCTION__);
}

function checkGet($variableName, $defaultValue = "") {
	return checkRequest($variableName, $defaultValue, __FUNCTION__);
}

$timeout = checkPost("timeout"); 
$requestType = checkPost("requestType");
$monitorList = checkPost("monitorList");
$previousUpdateStatusList = checkPost("previousUpdateStatusList");
$currentUpdateStatusList = array();

$maximumRetries = checkPost("timeout", 300);

for ($retryCount = 0; $retryCount < $maximumRetries; $retryCount++)  {
	// #things
	$currentUpdateStatusList = array();
	$updateFlag = false;
	$fileCount = count($monitorList);
	for ($file = 0; $file < $fileCount; $file++) {
		$filePath = $monitorList[$file];
		$fileStatus = stat($filePath);
		$currentUpdateStatusList[] = $fileStatus["mtime"];

		if (
			isset($previousUpdateStatusList[$file]) &&
			$currentUpdateStatusList[$file] != $previousUpdateStatusList[$file]
		) {
			$updateFlag = !$updateFlag;
			$currentUpdateStatusList[$file] .= ":updated";
		}
	}
	 
	if (!$updateFlag) {
		sleep(1);
	} else {
		$response["previousUpdateStatusList"] = implode(",", $currentUpdateStatusList);
		header("Content-Type: application/json");
		header("Expires: Tue, 01 Jan 2000 00:00:00 GMT");
		header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
		header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
		header("Cache-Control: post-check=0, pre-check=0", false);
		header("Pragma: no-cache");
		print(json_encode($response));
		break;
	}
}