{Xhprof}
XhProf是一个分层PHP性能分析工具,可它报告函数级别的请求次数和各种指标,包括阻塞时间,CPU时间和内存使用情况。
[情况]
以 上两个应用Apache+php组合在Windows上是比较常见,一般用来组织开发环境,或者调试环境,或者测试环境,当然也有不少是用于生产环境的, 对于我而言,我是用他们来进行开发的,由于比较习惯了在Windows下面开发,尽管自己也搭建了基于Linux虚拟机的开发平台,用着也还可以,但总是 无法舍离Windows下的环境。
我 一直是eclipse+xdebug的方式开发调试,没有遇到太多的问题,开发也比较的顺利,不过昨天在测试一个页面的时候,发现php出现了一种类似锁 死的现象,即执行该页面后,php-cgi一直挂在进程里,既没有cpu消耗,也没有内存级数增长,仅仅是停留着不动,网页也不生成,百思不得其解,而且 仔细检查和调试代码也没有发现明显的瓶颈,另外我是在自己的6核电脑上测试的,文件系统也是正常的,锁死就变成了很奇怪的事情。我自己使用的是 Apache_1.3.37-Win32+php-5.2.6-Win32+Xdebug-2.1.2版本调试的,发现在调试过程中,整个eclipse 都处于无响应的状态,似乎这种锁死有传导性,故调试一直无法进行,由于写了比较多的代码,有点累,没有去想是什么具体原因,暂且休息一会。
在搜索的时候无意中发现了Xhprof工具,看了一些博主的文章,发现这个工具可以分析程序性能,值可能有一些粗略,是基于函数的,但却是很直观和清晰的,非常感兴趣,所以挂起了刚才的开发,研究下这个东西。
[过程]
由 于参考了好几个博文,而且都是基于Linux版本的介绍,没有找到一个基于Windows的介绍,总不能一下子就切换到Linux下面去开发吧?所以又搜 索,发现一个外文站点提供了一个编译好的Xhprof,不过版本是基于php-5.3.3-Win32版本的,代码是基于Xhprof的0.9.2版本 的,呵呵,看来有人和我想到一块儿了,不过搜索的结果非常少,中文的几乎几乎没有,外文的也就只有凤毛麟角的几个结果而已。
从 该外文站点下载了xhprof for windows版本,又从facebook原始发布站下载了相关的xhprof代码和相关的生成页面文档,由于xhprof是基于php5.3.3编译 的,还需要准备php5.3.3,直接去php.net去拉一个vc6线程安全版本下来。
Apache有现成的,所以直接修改了原来的http.conf,把php5.3.3以cgi方式引入apache中,调试了一下,顺利的集成,phpinfo一切正常,xdebug也是一切正常的,现在开始加入xhprof的准备工作都做好了。
直接把xhprof for windows版本安置好,然后在要测试的页面里面加入调试页面和代码,就可以啦。
[步骤]
先要下载xhprof for windows版本,这个没得说,地址:http://www.benjamin-carl.de/?download=XHProf-0.10.0-PHP-5.3.3-VC6-x86-TS,http://pan.baidu.com/share/link?shareid=239782&uk=337775431下载的zip文件解压缩后是一个dll文件,直接放到php的ext目录里面就可以了,如图1所示:
图1
然 后要把xhprof的两个包含了调试输出页面的子目录安置好,这里我选择了直接安置在自己网站发布位置的根目录里,也就是apache默认的htdocs 的目录里面,我这里的htdocs是转移到另外一个开发U盘上的,方便在不同的地方编制代码,如图2所示,这里图示了一共3个文件夹,分别是 xhprof_html、xhprof_lib、xprof_log,其中xhprof_html和xhprof_lib是从下载的xhprof源代码文 件包里得到的,包所在站点:http://pecl.php.net/package/xhprof,xhprof下载地址:http://pecl.php.net/get/xhprof-0.9.2.tgz,然后自行在htdocs里创建xprof_log文件夹,这个文件夹是用来存放页面分析数据的。
图2
由于我的Apache+php已经完全调试好,所以要处理的只有php.ini文件,开启办法很简单,在该文件的末尾加上如下代码即可:
[xhprof]
extension=php_xhprof.dll
; directory used by default implementation of the iXHProfRuns
; interface (namely, the XHProfRuns_Default class) for storing
; XHProf runs.
xhprof.output_dir="M:/htdocs/xhprof_log"“提示:xhprof.output_dir=这个使用于设置性能分析数据存放位置的,我这里应为htdocs在M盘,故设置为M:/htdocs/xhprof_log,也就是上述的目录位置”
添加成功后,可以重启Apache看看phpinfo()信息中是否包含了xhprof的段,有的话,那就安装成功了,提示:以cgi方式运行的php修改了php.ini以后,可以直接运行phpinfo()查看结果,而无须重新启动Apache。结果的话如图3所示:
图3
好了,至此为止,xhprof已经正确的安装好了。

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

The reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.

PHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.

In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

WebStorm Mac version
Useful JavaScript development tools

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.