php 如何编写与 Laravel 相同的 DD() 函数？

How to write own DD() function same as laravel?

提问by Shankar Thiyagaraajan

I used laravel for a long time but currently I work with wordpress. I loved using the laravel's DD()function. But in wordpress I can only use these,

我使用 laravel 很长时间了，但目前我使用 wordpress。我喜欢使用 laravel 的DD()功能。但是在wordpress中我只能使用这些，

   print_r(),
   var_dump(),
   var_export()....

These all are just expand entire arrayor object. But I need laravel's expandand closemechanism for handling array and object. I use the following as general ddneed,

这些都只是扩展整个数组或对象。但是我需要 laravel 的扩展和关闭机制来处理数组和对象。我使用以下作为一般dd需要，

if (!function_exists('dd')) {
 function dd()
  {
      echo '<pre>';
      array_map(function($x) {var_dump($x);}, func_get_args());
      die;
   }
 }

It works well, but I need a styled and organised form of listing.

它运作良好，但我需要一个有样式和有组织的列表形式。

Is it possible ?

是否可以 ？

回答by Red Panda

Laravel's dduses symfony's VarDump component. Then you'll have a globally available dumpfunction which formats the output. The only difference is that it won`t "die" after the dump, you'll have to do that manually - but in most cases that isn't even something you'd want.

Laraveldd使用 symfony 的VarDump 组件。然后，您将拥有一个全局可用的dump函数来格式化输出。唯一的区别是它不会在转储后“死亡”，您必须手动执行此操作 - 但在大多数情况下，这甚至不是您想要的。

1. Run composer global require symfony/var-dumper(assuming you have composer in your wordpress project)
2. Add auto_prepend_file = ${HOME}/.composer/vendor/autoload.phpto your php.ini file;
3. From time to time, run composer global update symfony/var-dumperto have the latest bug fixes.

1. 运行composer global require symfony/var-dumper（假设你的 wordpress 项目中有 composer）
2. 添加auto_prepend_file = ${HOME}/.composer/vendor/autoload.php到您的 php.ini 文件中；
3. 不时运行composer global update symfony/var-dumper以获取最新的错误修复。

Here is the documentation for the VarDumper component. https://symfony.com/doc/current/components/var_dumper.html

这是 VarDumper 组件的文档。https://symfony.com/doc/current/components/var_dumper.html

So your ddfunction could look like this:

所以你的dd函数可能是这样的：

if (!function_exists('dd')) {
    function dd()
    {
        array_map(function($x) { 
            dump($x); 
        }, func_get_args());
        die;
    }
 }

回答by Ngoc Nam

I updated more functions and latest code of dfunctions below in debug functionspackage.

我d在调试函数包中更新了更多函数和最新的函数代码。

(Below answer is about 1 year ago.)

（下面的答案是大约一年前的。）

======================================

======================================

Below is my own code. It can work in plain PHP (no framework).

下面是我自己的代码。它可以在普通的 PHP 中工作（无框架）。

function d($data){
    if(is_null($data)){
        $str = "<i>NULL</i>";
    }elseif($data == ""){
        $str = "<i>Empty</i>";
    }elseif(is_array($data)){
        if(count($data) == 0){
            $str = "<i>Empty array.</i>";
        }else{
            $str = "<table style=\"border-bottom:0px solid #000;\" cellpadding=\"0\" cellspacing=\"0\">";
            foreach ($data as $key => $value) {
                $str .= "<tr><td style=\"background-color:#008B8B; color:#FFF;border:1px solid #000;\">" . $key . "</td><td style=\"border:1px solid #000;\">" . d($value) . "</td></tr>";
            }
            $str .= "</table>";
        }
    }elseif(is_resource($data)){
        while($arr = mysql_fetch_array($data)){
            $data_array[] = $arr;
        }
        $str = d($data_array);
    }elseif(is_object($data)){
        $str = d(get_object_vars($data));
    }elseif(is_bool($data)){
        $str = "<i>" . ($data ? "True" : "False") . "</i>";
    }else{
        $str = $data;
        $str = preg_replace("/\n/", "<br>\n", $str);
    }
    return $str;
}

function dnl($data){
    echo d($data) . "<br>\n";
}

function dd($data){
    echo dnl($data);
    exit;
}

function ddt($message = ""){
    echo "[" . date("Y/m/d H:i:s") . "]" . $message . "<br>\n";
}

回答by Rajitha Bandara

For others who might be interested in Laravel like dd(), please check this repo -

对于可能对 dd() 等 Laravel 感兴趣的其他人，请查看此 repo -

https://github.com/wanfeiyy/laravel-dd

https://github.com/wanfeiyy/laravel-dd

回答by Bitclaw

You can bring in this namespace in your class use Illuminate\Support\Debug\Dumper;and then use it for your variables like this:

你可以在你的类中引入这个命名空间use Illuminate\Support\Debug\Dumper;，然后将它用于你的变量，如下所示：

(new Dumper)->dump($myVariable);

回答by Arun Code

The Laravel ddis actually a great function. However, the undergoing mechanism is var_dumpand then die.

Laraveldd实际上是一个很棒的函数。然而，发生机制是var_dump和 然后die。

Example:

例子：

$arr = [1,2,3,4,5,6];
var_dump($arr);
die();

回答by Lucas Bustamante

I do it like this:

我这样做：

function dd($a){
    var_dump($a);
    exit;
}

I use it all the time. Even created a Snippet for it in Sublime.

我用它所有的时间。甚至在 Sublime 中为它创建了一个片段。

I also use var_masterpieceChrome extension to get a nice output, where I can expand and collapse the array keys, etc.

我还使用var_masterpieceChrome 扩展程序来获得不错的输出，我可以在其中展开和折叠数组键等。

回答by Husnain Aslam

I do like this:

我喜欢这样：

function dd($var){ 
    echo "<pre>";
    print_r($var);
    exit;
}

回答by Abdo-Host

composer require --dev symfony/var-dumper

作曲家需要 --dev symfony/var-dumper

<?php     
if (! function_exists('dd')) {
            /**
             * Dump the passed variables and end the script.
             *
             * @param  mixed
             * @return void
             */
            function dd()
            {
                array_map(function ($value) {
                    if (class_exists(Symfony\Component\VarDumper\Dumper\CliDumper::class)) {
                        $dumper = 'cli' === PHP_SAPI ?
                            new Symfony\Component\VarDumper\Dumper\CliDumper :
                            new Symfony\Component\VarDumper\Dumper\HtmlDumper;
                        $dumper->dump((new Symfony\Component\VarDumper\Cloner\VarCloner)->cloneVar($value));
                    } else {
                        var_dump($value);
                    }
                }, func_get_args());
                die(1);
            }
        }

?>

回答by Mehran

it works like a charm.

它就像一个魅力。

function dd()
{
   array_map(function($x) { var_dump($x); }, func_get_args()); die;
}

回答by chebaby

Most of the time i work with laravel framework, when it came to debugging the dd()helper method become a very handful tool.

大多数时候我使用 laravel 框架，当涉及到调试dd()辅助方法时，它成为了一个非常少的工具。

But recently i was requested to work on a symfony 3.4 project, at first i use dump($my_vars); die();to dump and die my vars. But that became quickly very combersome. So i ended up by adding a dd()global helper method to the symfony 3.4 project, here is how:

但是最近我被要求在一个 symfony 3.4 项目上工作，起初dump($my_vars); die();我习惯于转储并杀死我的变量。但这很快变得非常麻烦。所以我最终在 symfony 3.4 项目中添加了一个dd()全局辅助方法，方法如下：

Inside src/folder i created Support/folder, inside of the Support/folder i created helpers.phpfile where i added my dump helper functions.

里面src/的文件夹我创建Support/的文件夹，将里面Support/的文件夹，我创建helpers.php文件，其中我将自己倾倒的辅助功能。

src/Support/helpers.php

源代码/支持/helpers.php

if (!function_exists('dd')) {

    /**
     * Dump the passed variables and end the script.
     *
     * @return void
     */
    function dd() {

        $args = func_get_args();

        call_user_func_array('dump', $args);

        die(1);
    }
}

You may need to add the new file (helpers.php) to your composer.jsonfile to be loaded for you automatically, like this:

您可能需要将新文件 ( helpers.php)添加composer.json到要自动加载的文件中，如下所示：

composer.json

作曲家.json

{
    ...

    "autoload": {
        "psr-4": {
            "App\": "src/"
        },
        "files": [
            "src/Support/helpers.php"
        ]
    },

    ...
}