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INI参数设置

创建一个新的扩展

  • 生成扩展
./ext_skel --extname=inis
  • config.m4
PHP_ARG_ENABLE(inis, whether to enable inis support,
[  --enable-inis           Enable inis support])

if test "$PHP_INIS" != "no"; then
  PHP_NEW_EXTENSION(inis, inis.c, $ext_shared)
fi
  • php_inis.h
ZEND_BEGIN_MODULE_GLOBALS(inis)
    char *name;
    long level;
ZEND_END_MODULE_GLOBALS(inis)

#ifdef ZTS 
#define INIS_G(v) TSRMG(inis_globals_id, zend_inis_globals *, v) 
#else 
#define INIS_G(v) (inis_globals.v) 
#endif
  • inis.c

定义全局变量

ZEND_DECLARE_MODULE_GLOBALS(inis)

设置INI参数

PHP_INI_BEGIN()
     STD_PHP_INI_ENTRY("inis.name","sunzy",PHP_INI_ALL,OnUpdateString,name,zend_inis_globals,inis_globals)
     STD_PHP_INI_ENTRY("inis.level","1",PHP_INI_ALL,OnUpdateLong,level,zend_inis_globals,inis_globals)
PHP_INI_END()

初始化函数

static void php_inis_init_globals(zend_inis_globals *inis_globals)
{
    inis_globals->name="sunzy.org";
    inis_globals->level=10;
}

注册&清除INI变量

PHP_MINIT_FUNCTION(inis)
{
    REGISTER_INI_ENTRIES();
    return SUCCESS;
}

PHP_MSHUTDOWN_FUNCTION(inis)
{
    UNREGISTER_INI_ENTRIES();
    return SUCCESS;
}

自定义函数

PHP_FUNCTION(inis_report)
{
    php_printf("Name:%s\n",INIS_G(name));
    php_printf("Level:%d\n",INIS_G(level));
}

注册自定义函数

const zend_function_entry inis_functions[] = {
    PHP_FE(inis_report,NULL)
    PHP_FE_END  /* Must be the last line in inis_functions[] */
};
  • 测试

测试脚本

$function = "inis_report";
call_user_func($function);

测试

$ /usr/local/php5.6.9/bin/php -q inis.php
Functions available in the test extension:
inis_report
Name:sunzy
Level:1

修改php.ini

inis.name=test
inis.level=2

$ /usr/local/php5.6.9/bin/php -q inis.php
Functions available in the test extension:
inis_report
Name:test
Level:2

相关的宏

  • ZEND_DECLARE_MODULE_GLOBALS ->Zend/zend_API.h
#ifdef ZTS
#define ZEND_DECLARE_MODULE_GLOBALS(module_name)	\
	ts_rsrc_id module_name##_globals_id;
#else
#define ZEND_DECLARE_MODULE_GLOBALS(module_name)							\
	zend_##module_name##_globals module_name##_globals;
#endif

ts_rsrc_id是线程安全里的内容

  • PHP_INI_BEGIN、PHP_INI_END、STD_PHP_INI_ENTRY ->main/php_ini.h
#define PHP_INI_BEGIN		ZEND_INI_BEGIN
#define PHP_INI_END		ZEND_INI_END
#define STD_PHP_INI_ENTRY	STD_ZEND_INI_ENTRY
  • ZEND_INI_BEGIN、ZEND_INI_END、STD_ZEND_INI_ENTRY -> Zend/zend_ini.h
#define ZEND_INI_BEGIN()		static const zend_ini_entry ini_entries[] = {
#define ZEND_INI_END()		{ 0, 0, NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, NULL, 0, 0, 0, NULL } };

#define ZEND_INI_ENTRY3_EX(name, default_value, modifiable, on_modify, arg1, arg2, arg3, displayer) \
	{ 0, modifiable, name, sizeof(name), on_modify, arg1, arg2, arg3, default_value, sizeof(default_value)-1, NULL, 0, 0, 0, displayer },

#define ZEND_INI_ENTRY3(name, default_value, modifiable, on_modify, arg1, arg2, arg3) \
	ZEND_INI_ENTRY3_EX(name, default_value, modifiable, on_modify, arg1, arg2, arg3, NULL)

#define ZEND_INI_ENTRY2_EX(name, default_value, modifiable, on_modify, arg1, arg2, displayer) \
	ZEND_INI_ENTRY3_EX(name, default_value, modifiable, on_modify, arg1, arg2, NULL, displayer)

#define ZEND_INI_ENTRY2(name, default_value, modifiable, on_modify, arg1, arg2) \
	ZEND_INI_ENTRY2_EX(name, default_value, modifiable, on_modify, arg1, arg2, NULL)
	
#ifdef ZTS
#define STD_ZEND_INI_ENTRY(name, default_value, modifiable, on_modify, property_name, struct_type, struct_ptr) \
	ZEND_INI_ENTRY2(name, default_value, modifiable, on_modify, (void *) XtOffsetOf(struct_type, property_name), (void *) &struct_ptr##_id)
#else
#define STD_ZEND_INI_ENTRY(name, default_value, modifiable, on_modify, property_name, struct_type, struct_ptr) \
	ZEND_INI_ENTRY2(name, default_value, modifiable, on_modify, (void *) XtOffsetOf(struct_type, property_name), (void *) &struct_ptr)
#endif

前面扩展中对ini变量的定义展开后

static const zend_ini_entry ini_entries[] = {//BEGIN
	{0, PHP_INI_ALL, "inis.enable", sizeof("inis.enable"), OnUpdateBool, enable, zend_inis_globals, inis_globals... }//inis.enable定义
	...
	{ 0, 0, NULL, 0, NULL, NULL, NULL, NULL, NULL, 0, NULL, 0, 0, 0, NULL } //END
};
  • REGISTER_INI_ENTRIES、UNREGISTER_INI_ENTRIES ->Zend/zend_ini.h
#define REGISTER_INI_ENTRIES() zend_register_ini_entries(ini_entries, module_number TSRMLS_CC) //注册ini变量
#define UNREGISTER_INI_ENTRIES() zend_unregister_ini_entries(module_number TSRMLS_CC) //清除ini变量
#define DISPLAY_INI_ENTRIES() display_ini_entries(zend_module)  //在phpinfo中显示变量值
  • ZEND_INIT_MODULE_GLOBALS ->Zend/zend_ini.h
#ifdef ZTS
#define ZEND_INIT_MODULE_GLOBALS(module_name, globals_ctor, globals_dtor)	\
	ts_allocate_id(&module_name##_globals_id, sizeof(zend_##module_name##_globals), (ts_allocate_ctor) globals_ctor, (ts_allocate_dtor) globals_dtor);
#else
#define ZEND_INIT_MODULE_GLOBALS(module_name, globals_ctor, globals_dtor)	\
	globals_ctor(&module_name##_globals);
#endif

初始化ini值的宏

module_name 与传递给ZEND_BEGIN_MODULE_GLOBALS()宏相同的扩展名称。

globals_ctor 构造函数指针。在myfile扩展里，函数原形与void php_myfile_init_globals(zend_myfile_globals *myfile_globals)类似

globals_dtor 析构函数指针。例如，php_myfile_init_globals(zend_myfile_globals *myfile_globals)