In PHP, you can define the Extension name through "zend_module_entry" to write the "PHP_FUNCTION" function, which is the extension function.
PHP extension initialization
Initialization extension
$ php /php-src/ext/ext_skel.php --ext
Define extension function
zend_module_entry Define Extension name Write PHP_FUNCTION function
Compile and install
$ phpize $ ./configure $ make && make install
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