编写自定义helper的最佳实践是

1)在项目根目录的app目录中，创建一个名为Helpers的文件夹(只是为了分离和构造代码)。

2)在文件夹中写入psr-4文件或普通php文件

如果PHP文件的格式是psr-4，那么它将被自动加载，否则在编写器中添加以下行。Json，在项目根目录中

在autoload key中，创建一个名为files的新key来在自动加载时加载文件，在files对象中添加从app目录开始的路径。这里有一个例子。

"autoload": {
    "classmap": [
        "database"
    ],
    "psr-4": {
        "App\\": "app/"
    },
    "files": [
        "app/Helpers/customHelpers.php"
    ]
},
"autoload-dev": {
    "classmap": [
        "tests/TestCase.php"
    ]
},

PS:如果文件没有加载，尝试运行composer dump-autoload。

我使用的另一种方法是: 1)在应用程序\FolderName\fileName.php中创建一个文件，并在其中包含以下代码

<?php
namespace App\library
{
 class hrapplication{
  public static function libData(){
   return "Data";
  }
 }
}
?>

2)之后在我们的刀片

 $FmyFunctions = new \App\FolderName\classsName;
  echo $is_ok = ($FmyFunctions->libData());

就是这样。这是可行的

在你的app文件夹中创建一个helpers.php文件，并用composer加载它:

"autoload": {
    "classmap": [
        ...
    ],
    "psr-4": {
        "App\\": "app/"
    },
    "files": [
        "app/helpers.php" // <---- ADD THIS
    ]
},

然后把它添加到你的作曲家。Json文件，执行如下命令:

composer dump-autoload

如果您不喜欢将helpers.php文件保存在app目录中(因为它不是一个PSR-4命名空间类文件)，您可以做laravel.com网站所做的事情:将helpers.php存储在bootstrap目录中。记得在你的作曲器中设置它。json文件:

"files": [
    "bootstrap/helpers.php"
]

这是我的HelpersProvider.php文件:

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;

class HelperServiceProvider extends ServiceProvider
{
    protected $helpers = [
        // Add your helpers in here
    ];

    /**
     * Bootstrap the application services.
     */
    public function boot()
    {
        //
    }

    /**
     * Register the application services.
     */
    public function register()
    {
        foreach ($this->helpers as $helper) {
            $helper_path = app_path().'/Helpers/'.$helper.'.php';

            if (\File::isFile($helper_path)) {
                require_once $helper_path;
            }
        }
    }
}

你应该在app文件夹下创建一个名为Helpers的文件夹，然后在里面创建一个名为whatever.php的文件，并在$ Helpers数组中添加字符串whatever。

完成了!

Edit

我不再使用这个选项，我目前使用作曲家加载静态文件，如帮助。

你可以直接在:

...
"autoload": {
    "files": [
        "app/helpers/my_helper.php",
        ...
    ]
},
...

Laravel 5自定义刀片指令

是的，还有另一种方法!

第一步:注册一个自定义Blade指令:

<?php // code in app/Providers/AppServiceProvider.php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;

use Blade; // <-- This is important! Without it you'll get an exception.

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
     public function boot()
     {
         // Make a custom blade directive:
         Blade::directive('shout', function ($string) {
             return trim(strtoupper($string), '(\'\')');
         });

         // And another one for good measure:
         Blade::directive('customLink', function () {
             return '<a href="#">Custom Link</a>';
         });
     }
    ...

步骤2:使用自定义Blade指令:

<!-- // code in resources/views/view.blade.php -->

@shout('this is my custom blade directive!!')
<br />
@customLink

输出:

这是我的自定义刀片指令!! 自定义链接

来源:https://laravel.com/docs/5.1/blade extending-blade

附加阅读:https://mattstauffer.co/blog/custom-conditionals-with-laravels-blade-directives

如果您想学习如何最好地创建可以在任何地方使用的自定义类，请参阅Laravel 5中的自定义类，简单方法

下面是我创建的一个bash shell脚本，用于快速制作Laravel 5外观。

在Laravel 5安装目录中运行这个程序。

这样叫它:

make_facade.sh -f <facade_name> -n '<namespace_prefix>'

例子:

make_facade.sh -f helper -n 'App\MyApp'

如果你运行这个例子，它会在“your_laravel_installation_dir/app/MyApp”下创建目录Facades和Providers。

它将创建以下3个文件，并将它们输出到屏幕上:

./app/MyApp/Facades/Helper.php
./app/MyApp/Facades/HelperFacade.php
./app/MyApp/Providers/HelperServiceProvider.php

完成后，它将显示类似于下面的消息:

===========================
    Finished
===========================

Add these lines to config/app.php:
----------------------------------
Providers: App\MyApp\Providers\HelperServiceProvider,
Alias: 'Helper' => 'App\MyApp\Facades\HelperFacade',

更新'config/app.php'中的Providers和Alias列表

运行composer -o dumpautoload

"./app/MyApp/Facades/Helper.php"最初看起来是这样的:

<?php

namespace App\MyApp\Facades;


class Helper
{
    //
}

现在只需在“。/app/MyApp/Facades/Helper.php”中添加方法。

下面是“。/app/MyApp/Facades/Helper.php”在我添加了一个Helper函数后的样子。

<?php

namespace App\MyApp\Facades;

use Request;

class Helper
{
    public function isActive($pattern = null, $include_class = false)
    {
        return ((Request::is($pattern)) ? (($include_class) ? 'class="active"' : 'active' ) : '');
    }
}

This is how it would be called:
===============================

{!!  Helper::isActive('help', true) !!}

这个函数需要一个模式，并且可以接受可选的第二个布尔参数。

如果当前URL匹配传递给它的模式，它将输出'active'(或者'class="active"'，如果你添加'true'作为函数调用的第二个参数)。

我用它来突出显示激活的菜单。

下面是我的脚本的源代码。我希望你觉得它有用，如果你有任何问题请告诉我。

#!/bin/bash

display_syntax(){
    echo ""
    echo "  The Syntax is like this:"
    echo "  ========================"
    echo "      "$(basename $0)" -f <facade_name> -n '<namespace_prefix>'"
    echo ""
    echo "  Example:"
    echo "  ========"
    echo "      "$(basename $0) -f test -n "'App\MyAppDirectory'"
    echo ""
}


if [ $# -ne 4 ]
then
    echo ""
    display_syntax
    exit
else
# Use > 0 to consume one or more arguments per pass in the loop (e.g.
# some arguments don't have a corresponding value to go with it such
# as in the --default example).
    while [[ $# > 0 ]]
    do
        key="$1"
            case $key in
            -n|--namespace_prefix)
            namespace_prefix_in="$2"
            echo ""
            shift # past argument
            ;;
            -f|--facade)
            facade_name_in="$2"
            shift # past argument
            ;;
            *)
                    # unknown option
            ;;
        esac
        shift # past argument or value
    done
fi
echo Facade Name = ${facade_name_in}
echo Namespace Prefix = $(echo ${namespace_prefix_in} | sed -e 's#\\#\\\\#')
echo ""
}


function display_start_banner(){

    echo '**********************************************************'
    echo '*          STARTING LARAVEL MAKE FACADE SCRIPT'
    echo '**********************************************************'
}

#  Init the Vars that I can in the beginning
function init_and_export_vars(){
    echo
    echo "INIT and EXPORT VARS"
    echo "===================="
    #   Substitution Tokens:
    #
    #   Tokens:
    #   {namespace_prefix}
    #   {namespace_prefix_lowerfirstchar}
    #   {facade_name_upcase}
    #   {facade_name_lowercase}
    #


    namespace_prefix=$(echo ${namespace_prefix_in} | sed -e 's#\\#\\\\#')
    namespace_prefix_lowerfirstchar=$(echo ${namespace_prefix_in} | sed -e 's#\\#/#g' -e 's/^\(.\)/\l\1/g')
    facade_name_upcase=$(echo ${facade_name_in} | sed -e 's/\b\(.\)/\u\1/')
    facade_name_lowercase=$(echo ${facade_name_in} | awk '{print tolower($0)}')


#   Filename: {facade_name_upcase}.php  -  SOURCE TEMPLATE
source_template='<?php

namespace {namespace_prefix}\Facades;

class {facade_name_upcase}
{
    //
}
'


#  Filename: {facade_name_upcase}ServiceProvider.php    -   SERVICE PROVIDER TEMPLATE
serviceProvider_template='<?php

namespace {namespace_prefix}\Providers;

use Illuminate\Support\ServiceProvider;
use App;


class {facade_name_upcase}ServiceProvider extends ServiceProvider {

    public function boot()
    {
        //
    }

    public function register()
    {
        App::bind("{facade_name_lowercase}", function()
        {
            return new \{namespace_prefix}\Facades\{facade_name_upcase};
        });
    }

}
'

#  {facade_name_upcase}Facade.php   -   FACADE TEMPLATE
facade_template='<?php

namespace {namespace_prefix}\Facades;

use Illuminate\Support\Facades\Facade;

class {facade_name_upcase}Facade extends Facade {

    protected static function getFacadeAccessor() { return "{facade_name_lowercase}"; }
}
'
}


function checkDirectoryExists(){
    if [ ! -d ${namespace_prefix_lowerfirstchar} ]
    then
        echo ""
        echo "Can't find the namespace: "${namespace_prefix_in}
        echo ""
        echo "*** NOTE:"
        echo "           Make sure the namspace directory exists and"
        echo "           you use quotes around the namespace_prefix."
        echo ""
        display_syntax
        exit
    fi
}

function makeDirectories(){
    echo "Make Directories"
    echo "================"
    mkdir -p ${namespace_prefix_lowerfirstchar}/Facades
    mkdir -p ${namespace_prefix_lowerfirstchar}/Providers
    mkdir -p ${namespace_prefix_lowerfirstchar}/Facades
}

function createSourceTemplate(){
    source_template=$(echo "${source_template}" | sed -e 's/{namespace_prefix}/'${namespace_prefix}'/g' -e 's/{facade_name_upcase}/'${facade_name_upcase}'/g' -e 's/{facade_name_lowercase}/'${facade_name_lowercase}'/g')
    echo "Create Source Template:"
    echo "======================="
    echo "${source_template}"
    echo ""
    echo "${source_template}" > ./${namespace_prefix_lowerfirstchar}/Facades/${facade_name_upcase}.php
}

function createServiceProviderTemplate(){
    serviceProvider_template=$(echo "${serviceProvider_template}" | sed -e 's/{namespace_prefix}/'${namespace_prefix}'/g' -e 's/{facade_name_upcase}/'${facade_name_upcase}'/g' -e 's/{facade_name_lowercase}/'${facade_name_lowercase}'/g')
    echo "Create ServiceProvider Template:"
    echo "================================"
    echo "${serviceProvider_template}"
    echo ""
    echo "${serviceProvider_template}" > ./${namespace_prefix_lowerfirstchar}/Providers/${facade_name_upcase}ServiceProvider.php
}

function createFacadeTemplate(){
    facade_template=$(echo "${facade_template}" | sed -e 's/{namespace_prefix}/'${namespace_prefix}'/g' -e 's/{facade_name_upcase}/'${facade_name_upcase}'/g' -e 's/{facade_name_lowercase}/'${facade_name_lowercase}'/g')
    echo "Create Facade Template:"
    echo "======================="
    echo "${facade_template}"
    echo ""
    echo "${facade_template}" > ./${namespace_prefix_lowerfirstchar}/Facades/${facade_name_upcase}Facade.php
}


function serviceProviderPrompt(){
    echo "Providers: ${namespace_prefix_in}\Providers\\${facade_name_upcase}ServiceProvider,"
}

function aliasPrompt(){
    echo "Alias: '"${facade_name_upcase}"' => '"${namespace_prefix_in}"\Facades\\${facade_name_upcase}Facade'," 
}

#
#   END FUNCTION DECLARATIONS
#


###########################
## START RUNNING SCRIPT  ##
###########################

display_start_banner

init_and_export_vars
makeDirectories 
checkDirectoryExists
echo ""

createSourceTemplate
createServiceProviderTemplate
createFacadeTemplate
echo ""
echo "==========================="
echo "  Finished TEST"
echo "==========================="
echo ""
echo "Add these lines to config/app.php:"
echo "----------------------------------"
serviceProviderPrompt
aliasPrompt
echo ""