Update 04.md

加入扩展代码

Author: sunzy

04.md

@@ -1,8 +1,135 @@
 # INI参数设置
 
-1，创建一个新的扩展
+## 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
+```
 
-	./ext_skel --extname=inis
 
 2，宏