Recently on the PHP official website to see a new version of PHP download, and then went up to find for Windows, but a look, altogether gave four versions, VC9 x86 Non thread safe, VC9 x86 thread safe, VC6 x86 Non thread Safe, VC6 x86 Thread safe, which makes me this rookie headache ah, fortunately, PHP website to download the place on the left there is an English choose I understand, I reckoned is how to choose the version of the meaning of it, so began to look up the dictionary and Internet search, finally see the specific meaning, Let's do a memo first. Give PHP100 to make an advertisement, it is said that the eldest brother wants a video demonstration, I explain briefly.
I. How to select the VC9 version and the VC6 version of PHP5.3
What is VC6?
VC6 is Legacy Visual Studio 6 compiler, which is compiled with this compiler.
What is VC9?
VC9 is the Visual Studio compiler, which is compiled with Microsoft's vs Editor.
So how do we choose which version of PHP to download?
If you are using apache+php under Windows, please select the VC6 version;
If you are using iis+php under Windows, please select the VC9 version.
Second, how to choose the PHP5.3 thread safe and non thread safe version
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.
Let's look at two ways of executing PHP: ISAPI and fastcgi.
ISAPI execution mode 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 it is to execute PHP with ISAPI, it is recommended to choose thread Safe version;
The fastcgi execution is performed with 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 non thread safe version.
The official does not recommend that you apply the non thread safe to the production environment, so we chose the thread safe version of PHP to use.
The above describes the OFFICE2003 installation package PHP 531 installation package VC9 VC6 Different versions of what the difference is, including the office2003 installation package aspects, I hope to be interested in PHP tutorial friends helpful.
