/**
    * returns the time in ODBC canonical form with microseconds
    *
    * @return string
    * @access public
    */
	function getmicrotime() {
		if (function_exists('gettimeofday')) {
			$tod = gettimeofday();
			$sec = $tod['sec'];
			$usec = $tod['usec'];
		} else {
			$sec = time();
			$usec = 0;
		}
		return strftime('%Y-%m-%d %H:%M:%S', $sec) . '.' . sprintf('%06d', $usec);
	}

    function varDump($data) {
		ob_start();
		var_dump($data);
		$ret_val = ob_get_contents();
		ob_end_clean();
		return $ret_val;
	}
}

// XML Schema Datatype Helper Functions

//xsd:dateTime helpers

/**
* convert unix timestamp to ISO 8601 compliant date string
*
* @param    string $timestamp Unix time stamp
* @access   public
*/
function timestamp_to_iso8601($timestamp,$utc=true){
	$datestr = date('Y-m-d\TH:i:sO',$timestamp);
	if($utc){
		$eregStr =
		'([0-9]{4})-'.	// centuries & years CCYY-
		'([0-9]{2})-'.	// months MM-
		'([0-9]{2})'.	// days DD
		'T'.			// separator T
		'([0-9]{2}):'.	// hours hh:
		'([0-9]{2}):'.	// minutes mm:
		'([0-9]{2})(\.[0-9]*)?'. // seconds ss.ss...
		'(Z|[+\-][0-9]{2}:?[0-9]{2})?'; // Z to indicate UTC, -/+HH:MM:SS.SS... for local tz's

		if(ereg($eregStr,$datestr,$regs)){
			return sprintf('%04d-%02d-%02dT%02d:%02d:%02dZ',$regs[1],$regs[2],$regs[3],$regs[4],$regs[5],$regs[6]);
		}
		return false;
	} else {
		return $datestr;
	}
}

/**
* convert ISO 8601 compliant date string to unix timestamp
*
* @param    string $datestr ISO 8601 compliant date string
* @access   public
*/
function iso8601_to_timestamp($datestr){
	$eregStr =
	'([0-9]{4})-'.	// centuries & years CCYY-
	'([0-9]{2})-'.	// months MM-
	'([0-9]{2})'.	// days DD
	'T'.			// separator T
	'([0-9]{2}):'.	// hours hh:
	'([0-9]{2}):'.	// minutes mm:
	'([0-9]{2})(\.[0-9]+)?'. // seconds ss.ss...
	'(Z|[+\-][0-9]{2}:?[0-9]{2})?'; // Z to indicate UTC, -/+HH:MM:SS.SS... for local tz's
	if(ereg($eregStr,$datestr,$regs)){
		// not utc
		if($regs[8] != 'Z'){
			$op = substr($regs[8],0,1);
			$h = substr($regs[8],1,2);
			$m = substr($regs[8],strlen($regs[8])-2,2);
			if($op == '-'){
				$regs[4] = $regs[4] + $h;
				$regs[5] = $regs[5] + $m;
			} elseif($op == '+'){
				$regs[4] = $regs[4] - $h;
				$regs[5] = $regs[5] - $m;
			}
		}
		return strtotime("$regs[1]-$regs[2]-$regs[3] $regs[4]:$regs[5]:$regs[6]Z");
	} else {
		return false;
	}
}