golang 调用 php7

https://github.com/taowen/go-php7

执行php文件

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)
    }
}

/tmp/index.php

<?php
echo("hello\n");

Eval，返回值

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()
    }
}

返回的value的生命周期所有权是golang程序，所以我们要负责DestroyValue

设置全局变量来传参

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()
    }
}

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。

PHP 回调 Golang

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()
    }
}

PHP 错误日志

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)
    }
}

/tmp/php.ini

error_reporting = E_ALL
error_log = "/tmp/php-error.log"

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

HTTP 输入输出

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()
    }
}

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

$_SERVER
$_GET
$_POST
$_FILE
$_COOKIE
$_ENV

echo的内容，http code和http header会被写回到传入的ResponseWriter

fastcgi_finish_request

fastcgi_finish_request

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()
    }
}

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。