/**
* 测试运行时间
*
* @return int
*/
public static function debugTime($flag = '', $output = false)
{
if (!self::$_lastTime) {
self::$_lastTime = array_sum(explode(' ', microtime()));
}
$nowTime = array_sum(explode(' ', microtime()));
$time = $nowTime - self::$_lastTime;
self::$_lastTime = $nowTime;
if ($output) {
echo $flag . $time . "\n";
}
return $time;
}