在laravel中，dd()属于laravel辅助函数；dd函数用于输出给定的值并结束脚本运行，可以打印laravel中的所有变量，语法为“dd($value1,$value2…)”。

本文操作环境：Windows10系统、Laravel6版、Dell G3电脑。

laravel中dd属于函数吗

dd 函数输出给定的值并结束脚本运行：

dd($value);dd($value1, $value2, $value3, …);

示例PHP全局使用Laravel辅助函数dd：

全局 composer.json

“require”: { “squizlabs/php_codesniffer”: “*”, “fxp/composer-asset-plugin”: “^1.4”, “symfony/var-dumper”: “3.3.16”}

配置PHP.ini

auto_prepend_file = “C:UsersMSAppDataRoamingComposervendorautoload.php”

更新Composer

composer global update

更新后重启apache就可以全局使用函数 dump()

dd() 方法

全局 composer.json

# 新增 autoload”autoload”: { “files”: [ “D:/web/php/debugHelper.php” ]}

新建 debugHelper.php

# install symfony/var-dump to your project# composer require symfony/var-dumper // use namespaceuse ComponentVarDumperClonerVarCloner;use ComponentVarDumperDumperCpDumper;use ComponentVarDumperDumperHtmlDumper as SymfonyHtmlDumper; /** * Class HtmlDumper */class HtmlDumper extends SymfonyHtmlDumper{ /**大专栏 PHP 全局使用 Laravel 辅助函数 ddnt”> * Colour definitions for output. * * @var array */ protected $styles = [ ‘default’ => ‘background-color:#fff; color:#222; pne-height:1.2em; font-weight:normal; font:12px Monaco, Consolas, monospace; word-wrap: break-word; white-space: pre-wrap; position:relative; z-index:100000’, ‘num’ => ‘color:#a71d5d’, ‘const’ => ‘color:#795da3’, ‘str’ => ‘color:#df5000’, ‘cchr’ => ‘color:#222’, ‘note’ => ‘color:#a71d5d’, ‘ref’ => ‘color:#a0a0a0’, ‘pubpc’ => ‘color:#795da3’, ‘protected’ => ‘color:#795da3’, ‘private’ => ‘color:#795da3’, ‘meta’ => ‘color:#b729d9’, ‘key’ => ‘color:#df5000’, ‘index’ => ‘color:#a71d5d’, ];} /** * Class Dumper */class Dumper{ /** * Dump a value with elegance. * * @param mixed $value * @return void */ pubpc function dump($value) { if (class_exists(CpDumper::class)) { $dumper = ‘cp’ === PHP_SAPI ? new CpDumper : new HtmlDumper; $dumper->dump((new VarCloner)->cloneVar($value)); } else { var_dump($value); } }} if (! function_exists(‘dd’)) { /** * Dump the passed variables and end the script. * * @param mixed * @return void */ function dd(…$args) { foreach ($args as $x) { (new Dumper)->dump($x); } die(1); }} if (! function_exists(‘dda’)) { /** * Dump the passed array variables and end the script. * * @param mixed * @return void */ function dda(…$args) { foreach ($args as $x) { (new Dumper)->dump($x->toArray()); } die(1); }}

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