Dry----002----PHP Version and Usage differences

PHP version of the differences and usage in detail when we install the PHP module, sometimes need to pay attention to PHP compiled version, the following explanation of PHP in the VC6, VC9, TS, NTS version of the differences and usage of the explanation, the two ways to introduce PHP implementation.

1. The difference between VC6 and VC9:
The VC6 version is compiled with the visual Studio 6 compiler, and if your PHP is built with Apache, you choose the VC6 version.

The VC9 version is compiled with the visual Studio 2008 compiler, and if your PHP is built with IIS, you choose the VC9 version.

The VC9 version is for the IIS server version, there is no support for Apache, and the VC6 version provides support for both IIS and Apache

2. The difference between TS and NTS:
The Windows version of PHP starts with the thread safe and nonethread safe from version 5.2.1.

In the first place, it is a thread safe to understand the literal meaning that thread security is performed in order to prevent the new requirements from exhausting system resources by starting the CGI execution of new threads. Non thread safe is non-threaded and does not thread (thread) security checks at execution time.

3. Two ways of executing PHP: ISAPI and fastcgi.
ISAPI execution method is used in the form of DLL dynamic library, can be executed after the user request, after processing a user request will not disappear immediately, so the need for thread security check, so as to improve the execution efficiency of the program, so if the ISAPI to execute PHP, Recommended Choice Threadsafe version;

FastCGI execution is performed in a single thread, so there is no need for thread security checks, and the removal of thread safety checks can improve execution efficiency, so if PHP is executed in fastcgi, it is recommended to choose the Nonthread safe version. Through Phpinfo (); Look at the thread Safety item in it, this project is to see if it is thread safe, if yes: enabled, generally it should be TS version, otherwise it is version nts.

Dry----002----PHP Version and Usage differences