<h2><strong>执行php文件</strong></h2>    <pre>  <code class="language-go">func Test_exec(t *testing.T) {      engine.Initialize()      ctx := &engine.Context{          Output: os.Stdout,      }      err := engine.RequestStartup(ctx)      if err != nil {          fmt.Println(err)      }      defer engine.RequestShutdown(ctx)      err = ctx.Exec("/tmp/index.php")      if err != nil {          fmt.Println(err)      }  }</code></pre>    <p>其中 /tmp/index.php 的内容为</p>    <pre>  <code class="language-go"><?php  echo("hello\n");</code></pre>    <h2><strong>Eval，返回值</strong></h2>    <pre>  <code class="language-go">func Test_eval(t *testing.T) {      engine.Initialize()      ctx := &engine.Context{}      err := engine.RequestStartup(ctx)      if err != nil {          fmt.Println(err)      }      defer engine.RequestShutdown(ctx)      val, err := ctx.Eval("return 'hello';")      if err != nil {          fmt.Println(err)      }      defer engine.DestroyValue(val)      if engine.ToString(val) != "hello" {          t.FailNow()      }  }</code></pre>    <p>返回的value的生命周期所有权是golang程序，所以我们要负责DestroyValue</p>    <h2><strong>设置全局变量来传参</strong></h2>    <pre>  <code class="language-go">func Test_argument(t *testing.T) {      engine.Initialize()      ctx := &engine.Context{}      err := engine.RequestStartup(ctx)      if err != nil {          fmt.Println(err)      }      defer engine.RequestShutdown(ctx)      err = ctx.Bind("greeting", "hello")      if err != nil {          fmt.Println(err)      }      val, err := ctx.Eval("return $greeting;")      if err != nil {          fmt.Println(err)      }      defer engine.DestroyValue(val)      if engine.ToString(val) != "hello" {          t.FailNow()      }  }</code></pre>    <p>传递进去的参数的生命周期是php控制的，在request shutdown的时候内存会被释放。</p>    <h2><strong>PHP 回调 Golang</strong></h2>    <pre>  <code class="language-go">type greetingProvider struct {      greeting string  }    func (provider *greetingProvider) GetGreeting() string {      return provider.greeting  }    func newGreetingProvider(args []interface{}) interface{} {      return &greetingProvider{          greeting: args[0].(string),      }  }    func Test_callback(t *testing.T) {      engine.Initialize()      ctx := &engine.Context{}      err := engine.RequestStartup(ctx)      if err != nil {          fmt.Println(err)      }      defer engine.RequestShutdown(ctx)      err = engine.Define("GreetingProvider", newGreetingProvider)      if err != nil {          fmt.Println(err)      }      val, err := ctx.Eval(`      $greetingProvider = new GreetingProvider('hello');      return $greetingProvider->GetGreeting();`)      if err != nil {          fmt.Println(err)      }      defer engine.DestroyValue(val)      if engine.ToString(val) != "hello" {          t.FailNow()      }  }</code></pre>    <h2><strong>PHP 错误日志</strong></h2>    <pre>  <code class="language-go">func Test_log(t *testing.T) {      engine.PHP_INI_PATH_OVERRIDE = "/tmp/php.ini"      engine.Initialize()      ctx := &engine.Context{          Log: os.Stderr,      }      err := engine.RequestStartup(ctx)      if err != nil {          fmt.Println(err)      }      defer engine.RequestShutdown(ctx)      _, err = ctx.Eval("error_log('hello', 4); trigger_error('sent from golang', E_USER_ERROR);")      if err != nil {          fmt.Println(err)      }  }</code></pre>    <p>其中 /tmp/php.ini 的内容为</p>    <pre>  <code class="language-go">error_reporting = E_ALL  error_log = "/tmp/php-error.log"</code></pre>    <p>错误会被输出到 /tmp/php-error.log。直接调用error_log会同时再输出一份到stderr</p>    <h2><strong>HTTP 输入输出</strong></h2>    <pre>  <code class="language-go">func Test_http(t *testing.T) {      engine.Initialize()      recorder := httptest.NewRecorder()      ctx := &engine.Context{          Request: httptest.NewRequest("GET", "/hello", nil),          ResponseWriter: recorder,      }      err := engine.RequestStartup(ctx)      if err != nil {          fmt.Println(err)      }      defer engine.RequestShutdown(ctx)      _, err = ctx.Eval("echo($_SERVER['REQUEST_URI']);")      if err != nil {          fmt.Println(err)      }      body, err := ioutil.ReadAll(recorder.Result().Body)      if err != nil {          fmt.Println(err)      }      if string(body) != "/hello" {          t.FailNow()      }  }</code></pre>    <p>所有的PHP超级全局变量都会被初始化为传递进去的Request的值，包括</p>    <pre>  <code class="language-go">$_SERVER  $_GET  $_POST  $_FILE  $_COOKIE  $_ENV</code></pre>    <p>echo的内容，http code和http header会被写回到传入的ResponseWriter</p>    <h2><strong>fastcgi_finish_request</strong></h2>    <p>PHP-FPM 很常用的一个功能是 fastcgi_finish_request ，用于在php里做一些异步完成的事情。这个特殊的全局函数必须支持</p>    <pre>  <code class="language-go">func Test_fastcgi_finish_reqeust(t *testing.T) {      engine.Initialize()      buffer := &bytes.Buffer{}      ctx := &engine.Context{          Output: buffer,      }      err := engine.RequestStartup(ctx)      if err != nil {          fmt.Println(err)      }      defer engine.RequestShutdown(ctx)      ctx.Eval("ob_start(); echo ('hello');")      if buffer.String() != "" {          t.FailNow()      }      ctx.Eval("fastcgi_finish_request();")      if buffer.String() != "hello" {          t.FailNow()      }  }</code></pre>    <p>实际的作用就是把output提前输出到 ResposneWriter 里去，让调用方知道结果。对于当前进程的执行其实是没有影响的，只是影响了output。</p>    <p> </p>    <p>来自：https://segmentfault.com/a/1190000007619087</p>    <p> </p>