<?php
  sample4_hello_world(); 
?>


which uses the following simple extension


------------------------- php_sample4.h ----------------------

#ifndef PHP_SAMPLE4_H
/* Prevent double inclusion */
#define PHP_SAMPLE4_H

/* Define Extension Properties */
#define PHP_SAMPLE4_EXTNAME    "sample4"
#define PHP_SAMPLE4_EXTVER    "1.0"

/* Import configure options
   when building outside of
   the PHP source tree */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

/* Include PHP Standard Header */
#include "php.h"

/* Define the entry point symbol
 * Zend will use when loading this module
 */
extern zend_module_entry sample4_module_entry;
#define phpext_sample4_ptr &sample4_module_entry

PHP_MINIT_FUNCTION(sample4);
PHP_MSHUTDOWN_FUNCTION(sample4);
PHP_FUNCTION(sample4_hello_world);

#endif /* PHP_SAMPLE4_H */
------------------------- php_sample4.h ----------------------


------------------------- php_sample4.c ----------------------

#include "php_sample4.h"
#include "ext/standard/info.h"
#include "main/sapi.h"
#include "php_ini.h"

ZEND_INI_MH(php_sample4_modify_greeting)
{
#ifdef ZTS 
    THREAD_T thread = tsrm_thread_id();
#else 
    void *thread = NULL;
#endif

    if (new_value_length == 0 ) {
        return FAILURE;
    }

    php_printf("sample 4: thread %p greeting modified..new value is %s\n",  thread, new_value);
    return SUCCESS;
}

PHP_INI_BEGIN()
    PHP_INI_ENTRY("sample4.greeting", "Hello World", PHP_INI_ALL, php_sample4_modify_greeting)
PHP_INI_END()

PHP_MINIT_FUNCTION(sample4)
{
#ifdef ZTS 
    THREAD_T thread = tsrm_thread_id();
#else 
    void *thread= NULL;
#endif

    php_printf(">> sample 4: thread %p minit \n", thread);
    REGISTER_INI_ENTRIES();
    php_printf("<< sample 4: thread %p minit \n", thread);
    return SUCCESS;
}

PHP_MSHUTDOWN_FUNCTION(sample4)
{
    UNREGISTER_INI_ENTRIES();
    return SUCCESS;
}

PHP_FUNCTION(sample4_hello_world)
{
    const char *greeting = INI_STR("sample4.greeting");
    php_printf("%s\n", greeting);
}

static function_entry php_sample4_functions[] = {
    PHP_FE(sample4_hello_world, NULL)
    { NULL, NULL, NULL }
};
 
zend_module_entry sample4_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
    STANDARD_MODULE_HEADER,
#endif
    PHP_SAMPLE4_EXTNAME,
    php_sample4_functions,
    PHP_MINIT(sample4),
    PHP_MSHUTDOWN(sample4),
    NULL,
    NULL,
    NULL,
#if ZEND_MODULE_API_NO >= 20010901
    PHP_SAMPLE4_EXTVER,
#endif
    STANDARD_MODULE_PROPERTIES
};

#ifdef COMPILE_DL_SAMPLE4
ZEND_GET_MODULE(sample4)
#endif


------------------------- php_sample4.c ----------------------