git clone https://github.com/php/php-src.git

cd php-src/ext/

./ext_skel --extname=php_hello

PHP_ARG_ENABLE(php_hello, whether to enable php_hello support,

    Make sure that the comment is aligned:

[  --enable-php_hello           Enable php_hello support])

if test "$PHP_PHP_HELLO" != "no"; then

    PHP_NEW_EXTENSION(php_hello, php_hello.c, $ext_shared)

fi

vim ./zend_API.h +35

typedef struct _zend_function_entry {

        const char *fname;

        void (*handler)(INTERNAL_FUNCTION_PARAMETERS);

        const struct _zend_arg_info *arg_info;

        zend_uint num_args;

        zend_uint flags;

} zend_function_entry;

const zend_function_entry hello_functions[] = {

        PHP_FE(confirm_hello_compiled,  NULL)           /* For testing, remove later. */

        PHP_FE_END      /* Must be the last line in hello_functions[] */

};

typedef struct _zend_module_entry zend_module_entry;

struct _zend_module_entry {

        unsigned short size;

        unsigned int zend_api;

        unsigned char zend_debug;

        unsigned char zts;

        const struct _zend_ini_entry *ini_entry;

        const struct _zend_module_dep *deps;

        const char *name;

        const struct _zend_function_entry *functions;

        int (*module_startup_func)(INIT_FUNC_ARGS);

        int (*module_shutdown_func)(SHUTDOWN_FUNC_ARGS);

        int (*request_startup_func)(INIT_FUNC_ARGS);

        int (*request_shutdown_func)(SHUTDOWN_FUNC_ARGS);

        void (*info_func)(ZEND_MODULE_INFO_FUNC_ARGS);

        const char *version;

        size_t globals_size;

#ifdef ZTS

        ts_rsrc_id* globals_id_ptr;

#else

        void* globals_ptr;

#endif

        void (*globals_ctor)(void *global TSRMLS_DC);

        void (*globals_dtor)(void *global TSRMLS_DC);

        int (*post_deactivate_func)(void);

        int module_started;

		  unsigned char type;

        void *handle;

        int module_number;

        const char *build_id;

};

/* {{{ hello_module_entry

 */

zend_module_entry hello_module_entry = {

#if ZEND_MODULE_API_NO >= 20010901

        STANDARD_MODULE_HEADER,

#endif

        "hello",

        hello_functions,

        PHP_MINIT(hello),

        PHP_MSHUTDOWN(hello),

        PHP_RINIT(hello),               /* Replace with NULL if there's nothing to do at request start */

        PHP_RSHUTDOWN(hello),   /* Replace with NULL if there's nothing to do at request end */

        PHP_MINFO(hello),

#if ZEND_MODULE_API_NO >= 20010901

        PHP_HELLO_VERSION,

#endif

        STANDARD_MODULE_PROPERTIES

};

/* }}} */

#define PHP_MINIT_FUNCTION              ZEND_MODULE_STARTUP_D

#define PHP_MSHUTDOWN_FUNCTION  ZEND_MODULE_SHUTDOWN_D

#define PHP_RINIT_FUNCTION              ZEND_MODULE_ACTIVATE_D

#define PHP_RSHUTDOWN_FUNCTION  ZEND_MODULE_DEACTIVATE_D

#define PHP_MINFO_FUNCTION              ZEND_MODULE_INFO_D

#define PHP_GINIT_FUNCTION              ZEND_GINIT_FUNCTION

#define PHP_GSHUTDOWN_FUNCTION  ZEND_GSHUTDOWN_FUNCTION

#define PHP_MODULE_GLOBALS              ZEND_MODULE_GLOBALS

PHP_MINIT_FUNCTION  初始化module时运行

PHP_MSHUTDOWN_FUNCTION  当module被卸载时运行

PHP_RINIT_FUNCTION  当一个REQUEST请求初始化时运行

PHP_RSHUTDOWN_FUNCTION  当一个REQUEST请求结束时运行

PHP_MINFO_FUNCTION  这个是设置phpinfo中这个模块的信息

PHP_GINIT_FUNCTION  初始化全局变量时

PHP_GSHUTDOWN_FUNCTION  释放全局变量时