C language extension to php under linux_PHP tutorial

1. Build a php environment
Download the php 5.2.6 source code and unzip it
Compile and install, build a php environment

2. Create an extension project
Enter the source code directory
cd php5.2.6/ext/
./ext_skel --extname=my_ext
Create a project named my_ext, which will eventually generate my_ext.so

Three, change the configuration and program
$ vi ext/my_ext/config.m4

Change

dnl PHP_ARG_WITH(my_ext, for my_ext support,
dnl Make sure that the comment is aligned:

dnl [ --with-my_ext                                                                                                                                                                                                                                               but for my_ext support my_ext support,
Make sure that the comment is aligned:

[ --with-my_ext                 Include my_ext support])
or

dnl PHP_ARG_ENABLE(my_ext, whether to enable my_ext support,
dnl Make sure that the comment is aligned:

dnl [ --enable-my_ext Enable my_ext support])
Modify to

PHP_ARG_ENABLE(my_ext, whether to enable my_ext support,

Make sure that the comment is aligned:
[ --enable-my_ext    Enable my_ext support])

$ vi ext/my_ext/php_my_ext.h

Change
PHP_FUNCTION(confirm_my_ext_compiled); /* For testing, remove later. */
Change to
PHP_FUNCTION(say_hello);


$ vi ext/my_ext/ my_ext.c

will
zend_function_entry php5cpp_functions[] = {
PHP_FE(confirm_my_ext_compiled, NULL) /* For testing, remove later. */
{NULL, NULL, NULL} /* Must be the last line in php5cpp_functions[] */
};
change to
zend_function_entry php5cpp_functions[] = {
PHP_FE(say_hello, NULL)
{NULL, NULL, NULL} / * Must be the last line in php5cpp_functions[] */
};

Add at the end:
PHP_FUNCTION(say_hello)
{
zend_printf("hello worldn");
}


Four. Compile

$ cd my_ext$ /usr/local/php/bin/phpizeps: If it appears: Cannot find autoconf. ... error message, you need to install autoconf (the installation process is omitted)
$ ./configure --with-php-config=/usr/local/php/bin/php-config
$ make

My_ext/modules/my_ext.so will be compiled at this time


5. Configure php.ini

Put my_ext.so into /usr/local/ php/ext/directory
$ vi php.ini


Modify and add as follows:extension_dir = '/usr/local/php /ext/'

extension=my_ext.so
6. Test

$ vi test.php say_hello();
?>

$ /usr/local/php/bin/php test.php
hello world.

then you’re done

ps: If you have any questions, please leave a message and we can discuss it together.