php中静态方法static和非静态方法效率对比
今天在看这篇文章的时候http://jingyan.baidu.com/article/6b97984d7892d21ca2b0bfc2.html发现第一句是这个
如果能将类的方法定义成static,就尽量定义成static,它的速度会提升将近4倍。
实践是检验代码执行效率的唯一标准,于是趁着下班回家有点时间,做了个小测试:
先上测试代码(如果有不对的地方,请大家指正哈):
测试环境:
/test # php -vPHP 5.4.24 (cli) (built: Jan 19 2014 21:32:15) Copyright (c) 1997-2013 The PHP GroupZend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies
/test # uname -aDarwin 192.168.0.101 13.1.0 Darwin Kernel Version 13.1.0: Thu Jan 16 19:40:37 PST 2014; root:xnu-2422.90.20~2/RELEASE_X86_64 x86_64
系统配置可以看这篇文章中的:http://blog.csdn.net/lamp_water/article/details/20968155
<?phpclass staticTest { public function test() { $i = 0; $i++; } public static function testStatic() { $i = 0; $i++; } }$start = microtime(true);for($i=0;$i<10000000;$i++) { $test = new staticTest(); $test->test();}echo (microtime(true) - $start) ."\n";$start = microtime(true);for($i=0;$i<br>循环执行一千万次执行结果如下:<p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"></span></span></p><p class="p1"><span class="s1"><strong>/test # </strong></span>php staticTest.php </p><p class="p1">2.2938342094421</p><p class="p1">1.1871800422668<br><strong>第二次执行结果:</strong></p><p class="p1"></p><p class="p1">2.303295135498</p><p class="p1">1.1807670593262</p>执行很多次以后,都在2.3和1.18附近。可见,虽然没有文章中说的效率提升那么恐怖,性能的提升方面确实提升了一倍左右。<p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px">因此还是建议:</span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><span style="color:rgb(51,51,51); font-family:'Microsoft Yahei',微软雅黑,arial,宋体,sans-serif; font-size:16px; line-height:28px; text-align:justify">如果能将类的方法定义成static,就尽量定义成static,它的速度会提升将近1倍。</span><br></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><span style="color:rgb(51,51,51); font-family:'Microsoft Yahei',微软雅黑,arial,宋体,sans-serif; font-size:16px; line-height:28px; text-align:justify">对于一个正常的php框架,里面的类和方法还是非常多的,如果我们能够做成静态方法,还是使用静态方法比较好,效率比较高。</span></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><br></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><br></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><br></span></span></p><p style="text-align:justify"><span style="font-family:Microsoft Yahei,微软雅黑,arial,宋体,sans-serif; font-size:14px; color:#333333"><span style="line-height:28px"><br></span></span></p><div class="clear"> </div>

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PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

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