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ZeedFramework/library/Zeed/Util/Timer.php

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+<?php
+/**
+ * Zeed Platform Project
+ * Based on Zeed Framework & Zend Framework.
+ *
+ * BTS - Billing Transaction Service
+ * CAS - Central Authentication Service
+ *
+ * LICENSE
+ * http://www.zeed.com.cn/license/
+ *
+ * @category   Zeed
+ * @package    Zeed_ChangeMe
+ * @subpackage ChangeMe
+ * @copyright  Copyright (c) 2010 Zeed Technologies PRC Inc. (http://www.zeed.com.cn)
+ * @author     Zeed Team (http://blog.zeed.com.cn)
+ * @since      2010-9-2
+ * @version    SVN: $Id$
+ */
+
+/**
+ * 计数器
+ *
+ * <code>
+ * // 在构造对象时，启动计数器
+ * $timer = new Zeed_Util_Timer(true);
+ *
+ * // 在构造对象时，不启动计数器，使用 start() 函数启动
+ * $timer = new Zeed_Util_Timer(false);
+ *
+ * $timenow = $timer->start();
+ * sleep(5);
+ * $timenow = $timer->stop();
+ *
+ * // 获取计数器耗时
+ * $timeElapsed = $timer->getElapsedTime();
+ *
+ * // 重设计数器
+ * $timer->reset();
+ * </code>
+ *
+ * @author Nroe
+ */
+class Zeed_Util_Timer
+{
+    /**
+     * 计数器开启时间
+     *
+     * @var integer
+     */
+    protected $_timeStart = 0;
+    
+    /**
+     * 计数器结束时间
+     *
+     * @var integer
+     */
+    protected $_timeEnd = 0;
+    
+    /**
+     * 计数器耗时
+     *
+     * @var integer
+     */
+    protected $_elapsed = 0;
+    
+    /**
+     * 获取当前时间
+     *
+     * @return      integer
+     */
+    protected function _getTime()
+    {
+        list($usec, $sec) = explode(' ', microtime());
+        return ((float) $usec + (float) $sec);
+    }
+    
+    /**
+     * 计算当前耗时
+     *
+     * @return      integer
+     */
+    protected function _compute()
+    {
+        if ($this->_timeEnd && $this->_timeStart) {
+            return $this->_timeEnd - $this->_timeStart;
+        }
+        
+        return 0;
+    }
+    
+    /**
+     * 构造计数器
+     *
+     * @param       boolean 是否启动计数器
+     * @return      void
+     */
+    public function __construct($start = false)
+    {
+        if ($start) {
+            $this->start();
+        }
+    }
+    
+    /**
+     * 启动计数器
+     *
+     * @return      float   $timenow 当前时间
+     */
+    public function start()
+    {
+        $this->_timeStart = $this->_getTime();
+        
+        return $this->_timeStart;
+    }
+    
+    /**
+     * 停止计数器
+     *
+     * @return      float   $timenow 当前时间
+     */
+    public function stop()
+    {
+        $this->_timeEnd = $this->_getTime();
+        $this->_elapsed = $this->_compute();
+        
+        return $this->_timeEnd;
+    }
+    
+    /**
+     * 获取当前计数器耗时
+     *
+     * @return      integer
+     */
+    public function getElapsedTime()
+    {
+        if (! $this->_elapsed) {
+            if ($this->_timeStart) {
+                $this->stop();
+            }
+            
+            return 0;
+        }
+        
+        return $this->_elapsed;
+    }
+    
+    /**
+     * 重设计数器
+     *
+     * @return      void
+     */
+    public function reset()
+    {
+        $this->_timeStart = 0;
+        $this->_timeEnd = 0;
+        $this->_elapsed = 0;
+    }
+}
+
+// End ^ Native EOL ^ encoding