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HomeBackend DevelopmentPHP TutorialLaravel 5.2.23 新特性预览

截至发布这篇文章的时候,Laravel 在 Github 上已经有 911 名贡献者,他们中的一些人正在帮助框架在日常的基础上加入一些更棒的东西。下面总结了一下 Laravel 5.2.23 中将加入的一些新功能。

1. in_array() 校验规则

Laravel 中的数组校验是非常棒的,最近我把我项目中的很多代码进行了替换,只需要简短的几行代码。在 5.2.23 中将加入一个新的规则,帮助校验一个 key 的值是否在另一个相关的 key 中。

Validator::make(    [        'devices' => [['user_id' => 1], ['user_id' => 2]],        'users' => [['id' => 1, ['id' => 2]]]    ],    ['devices.*.user_id' => 'in_array:users.*.id']);

这段代码会确保 user_id 的值都在 users 中。

2. Arr::first() & Arr::last() 提供了可选的回调函数

在前一个版本中,回调函数作为第二个参数是必选的,而在 5.2.23 中将变成可选参数。

$array = [100, 200, 300];// (NEW) This will return 100Arr::first($array); /** same for **/ array_first($array);// (NEW) This will return 300Arr::last($array); /** same for **/ array_last($array);// (You still can) do this and return 200Arr::first($array, function ($key, $value) {    return $value >= 150;});

3. 一次指定多个中间件

当为控制器添加中间件的时候,现在可以在一条语句中注册多个中间件了。

$this->middleware(['auth', 'subscribed'], ['only' => ['getCandy']]);

4. Blade 中添加了新的指令 @php, @endphp, @unset

@php 指令允许你这样写 PHP 语句:

@php($count = 1)@php(++ $count)
@php    $now = new DateTime();    $environment = isset($env) ? $env : "testing";@enphp

@unset() 其实就是对 unset() 的一个封装:

@unset($count)

5. 重写 Blade 核心指令的能力

在 5.2.23 之前你是不能扩展 Blade 和重写核心指令的,而现在你可以重写任何的核心指令。

6. 避免编译 Blade 指令

现在你可以在 Blade 指令前添加一个 @ 符号来避免编译指令。

// output: <?php continue; ?>@continue// output: @continue@@continue

7. 对 SparkPost 新的邮件驱动

8. 新的调度命令 monthlyOn()

$schedule->call(function () {    DB::table('shopping_list')->delete();})->monthlyOn(4, '12:00');

9. 新的 app()->isLocale() 方法

// Instead of thisif (app()->getLocale() == 'en')// You can do thatif (app()->isLocale('en'))

10. 使用查询生成器查询 MySQL 5.7 生成 JSON 字段更加流畅

MySQL 5.7 发布后,引入了一个新的 JSON 类型的字段,在 Laravel 5.2.23 中你可以像之前那样快速的查询出 Json 字段。

假设我们的 users 表中有个 JSON 类型的 name 列,其中有下面这样一个值:

{"en":"name","ar":"nom"}

你可以使用下面的语法查询该值:

User::where('name->en', 'name')->get();// You may dive deep in the JSON string using the `->` operator.User::where('contacts->phone->home', 1234);

11. 测试辅助方法 seeElement() 和 dontSeeElement()

假设有下面这样的元素:

<image width="100" height="50">

你可以使用下面的测试方法:

$this->seeElement('image', ['width' => 100, 'height' => 50]);$this->dontSeeElement('image', ['class' => 'video']);

12. 隐藏福利 #1

你知道你已经可以这么做了吗?

User::whereNameAndEmail('jon', 'jon@theWall.com')->first();User::whereNameAndEmailOrPhone('jon', 'jon@theWall.com', '123321')->first();DB::table('users')->whereEmailOrUsername('mail@mail.com', 'themsaid')->first();

13. 隐藏福利 #2

// Instead of this:if(!$item){    abort(404);}// You can do that:abort_unless($item);// You may also have something like this:abort_if($item->is_hidden);

译自: themsaid ,转载请注明来自Specs’ Blog。

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