iis运行php效率

IIS (Internet Information Services) is a web server software developed by Microsoft that can be used to host and run PHP applications. When it comes to the efficiency of running PHP on IIS, there are several factors to consider.

Firstly, IIS provides FastCGI support for running PHP, which allows for better performance compared to using CGI. FastCGI is a protocol that allows web servers to communicate with external applications, such as PHP, in a more efficient and persistent manner. This means that PHP processes can be kept alive and reused, reducing the overhead of creating and terminating processes for each request.

Here is an example of how to configure IIS to run PHP using FastCGI:

<configuration>
  <system.webServer>
    <handlers>
      <add name="PHP_via_FastCGI" path="*.php" verb="*" modules="FastCgiModule" scriptProcessor="C:\php\php-cgi.exe" resourceType="Either" />
    </handlers>
  </system.webServer>
</configuration>

In this example, we specify the path to the PHP CGI executable (`php-cgi.exe`) as the script processor for handling PHP files. This configuration tells IIS to use FastCGI to execute PHP scripts.

Additionally, IIS provides a feature called Output Caching, which can greatly improve the efficiency of running PHP applications. Output Caching allows the web server to store the output of a PHP script in memory and serve it directly to subsequent requests without re-executing the script. This can significantly reduce the processing time and improve the overall performance of PHP applications.

Here is an example of how to enable Output Caching in IIS:

<configuration>
  <system.webServer>
    <caching enabled="true" enableKernelCache="true">
      <profiles>
        <add extension=".php" policy="CacheUntilChange" kernelCachePolicy="CacheUntilChange" />
      </profiles>
    </caching>
  </system.webServer>
</configuration>

In this example, we enable caching for PHP files by specifying the file extension (`".php"`) and setting the caching policy to "CacheUntilChange". This tells IIS to cache the output of PHP scripts until they are modified.

In addition to these optimizations specific to IIS, there are also general best practices for improving the efficiency of PHP applications. These include using opcode caching (such as APC or OPcache) to cache compiled PHP code, optimizing database queries, minimizing file I/O operations, and using appropriate caching mechanisms (such as Memcached or Redis) for storing frequently accessed data.

By leveraging the features and optimizations provided by IIS, combined with implementing best practices for PHP development, developers can achieve efficient and high-performance PHP applications on IIS.