PHP non-thread safe vs thread safe
13 Sep 2018| Detail | Non thread safe | thread safe |
|---|---|---|
| Thread | single thread is used | multi-processing |
| Env | CGI binary, command line | env need multiple PHP threads |
| Web server | Nginx/Lighttpd | Apache MPM |
What are they
Since with mod_php, PHP gets loaded right into Apache, if Apache is going to handle concurrency using its Worker MPM (that is, using Threads) then PHP must be able to operate within this same multi-threaded environment – meaning, PHP has to be thread-safe to be able to play ball correctly with Apache! 1