PHP5 Non-thread-safe and Thread-safe These two versions of the difference analysis _php skills

First of all, None-thread safe is not thread secure, it is not thread security security at the time of execution, thread safe is threading security, thread safety checks are performed to prevent new requirements from starting the CGI of the new thread Execution runs out of system resources.

Then look at the two ways PHP executes: ISAPI and fastcgi. FastCGI execution is done with a single thread, so there is no need for thread security checks, and removal of thread security checks can improve execution efficiency, so if you are executing PHP with FastCGI (regardless of IIS 6 or IIS 7), it is recommended that you download, execute Non-thread Safe PHP (PHP's two-way file has two packages: MSI, zip, download zip suite). Thread security checks are just for ISAPI PHP, because there are many PHP modules that are not thread-safe, so you need to use thread safe's PHP.