## zephir简介
zephir是一门可以编写和编译php拓展的脚本语言，它是动态/静态类型的语言，很多的特性跟php非常的相似
## 依赖
* gcc >= 4.x/clang >= 3.x
* re2c 0.13+
* gnu make 3.81+
* autoconf 2.31+
* automake 1.14+
* libpcre3
* php development headers and tools
```
$ sudo apt-get update
$ sudo apt-get install git gcc make re2c php5 php5-json php5-dev libpcre3-dev
```
## zephir 安装
```
$ git clone https://github.com/phalcon/zephir.git
$ cd zephir
$ bash install -c
$ zephir help
Zephir version 0.9.6a-dev-aef205594b
```
> `bash install -c` 会把zephir/bin/zephir 拷贝到/usr/local/bin目录下
## php 拓展之hello world
```
$ cd /web/
$ mkdir zephir_test
$ zephir init hw
```
> 会发现hw 目录下面会有 ext/ hw/ config.json
在hw子目录下编写helloworld.zep文件
```
namespace Hw;
class HelloWorld
{
public static function say()
{
var a = "hello world";
echo strtoupper(a);
}
}
```
`$ zephir build`
> 会发现ext/目录下已经生成了php拓展的c语言代码
```
$ cd ext
$ bash install
$ /web/zephir_test/hw/ext$ bash install
Configuring for:
PHP Api Version: 20131106
Zend Module Api No: 20131226
Zend Extension Api No: 220131226
Configuring for:
PHP Api Version: 20131106
Zend Module Api No: 20131226
Zend Extension Api No: 220131226
```
> 生成hw.so文件， 最后再加入php.ini
```
extenstion=hw.so
```
## 运行helloworld拓展
```
$ php -r "Hw\HelloWorld::say();"
HELLO WORLD
```
## zephir 生成的C语言代码在ext/hw/helloworld.zep.c
```
PHP_METHOD(Hw_HelloWorld, say) {
zval *a = NULL, *_0;
ZEPHIR_MM_GROW();
ZEPHIR_INIT_VAR(a);
ZVAL_STRING(a, "hello world", 1);
ZEPHIR_INIT_VAR(_0);
zephir_fast_strtoupper(_0, a);
zend_print_zval(_0, 0);
ZEPHIR_MM_RESTORE();
}
```
