PHP（mysqli或pdo）如何运行MySQL命令？ [关闭]

Question

When using mysqli or PDO in a PHP script what are the mechanics that take place for the sql query to run?

Does the mysqli module run shell_exec() with a mysql command? I'm sure there is something more here.

Edit

More specifically what I wanted to know was what is the process that PHP takes to actually make a MySQL call, what are the mechanics involved for PHP to have access to the database.

Answer 1

There is a thing called Mysql C API.

Both PHP extensions are written by implementing low-level C functions from this API.