What is the difference between the CGI mode and the server-embedded module mode of PHP? _ PHP Tutorial

What is the difference between the CGI mode and the built-in module mode on the server ?. PHP running in CGI mode has the following shortcomings: 1. basic arguments cannot be used. 2. the returned variable is incorrect. for example, PHPSELF will add the interpreter path before the file name. the running speed is slow, and the consumption of PHP running in CGI mode is as follows:
1. basic arguments cannot be used.
2. the returned variable is incorrect. for example, PHPSELF will add the interpreter path before the file name.
3. slow operation and high consumption of system resources

Example 1. basic arguments cannot be used. 2. the returned variables are not allowed. for example, PHPSELF will add the interpreter path before the file name. 3. slow running speed and consumption...