1. First use ext_skel to create a PHP extended module skeleton:

What should be noted here is that the ext_skel tool is generally in the ext directory of the PHP source code package, but I prefer to put it out, that is, not to create a module in the ext directory of the PHP source code package. Suppose I now create a module in /home/php The module named php_hello

#cd /home/php

#/path/to/ext_skel --extname=php_hello

#cd php_hello

Modify the config.m4 file as follows: Simply remove some dnl comments:

PHP_ARG_WITH(php_hello, for php_hello support,
dnl Make sure that the comment is aligned:
[ --with-php_hello                               Include php_hello support])

or
PHP_ARG_WITH(php_hello, for php_hello support,
dnl Make sure that the comment is aligned:
[ --with-php_hello                               Include php_hello support])

This completes the skeleton of an extended module. Take a look at the end of config.m4: PHP_NEW_EXTENSION(php_hello, php_hello.c, $ext_shared) This line specifies the target file that the php_hello module needs to compile, which is php_hello.c