Reslove blade compilation error for laravel 5.8

app/Providers/BladeServiceProvider.php

@@ -20,14 +20,14 @@ class BladeServiceProvider extends ServiceProvider
     /**
      * Register any misc. blade extensions.
      */
-    public function register()
+    public function boot()
     {
         /*
          * The block of code inside this directive indicates
          * the chosen language requests RTL support.
          */
-        Blade::directive('langRTL', function () {
-            return "<?php if (session()->has('lang-rtl')): ?>";
+        Blade::if('langrtl', function ($session_identifier = 'lang-rtl') {
+            return session()->has($session_identifier);
         });
     }
 }

composer.lock

@@ -1303,16 +1303,16 @@
         },
         {
             "name": "laravel/framework",
-            "version": "v5.8.3",
+            "version": "v5.8.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/laravel/framework.git",
-                "reference": "d36d74acd3added5abbe7e7a84342b54bb0b0521"
+                "reference": "d651f8bd25c6baf7ae4913bc51f02849fad4e925"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/laravel/framework/zipball/d36d74acd3added5abbe7e7a84342b54bb0b0521",
-                "reference": "d36d74acd3added5abbe7e7a84342b54bb0b0521",
+                "url": "https://api.github.com/repos/laravel/framework/zipball/d651f8bd25c6baf7ae4913bc51f02849fad4e925",
+                "reference": "d651f8bd25c6baf7ae4913bc51f02849fad4e925",
                 "shasum": ""
             },
             "require": {
@@ -1446,7 +1446,7 @@
                 "framework",
                 "laravel"
             ],
-            "time": "2019-03-05T13:51:19+00:00"
+            "time": "2019-03-12T13:33:14+00:00"
         },
         {
             "name": "laravel/socialite",

config/app.php

@@ -191,7 +191,7 @@ return [
         App\Providers\AccessServiceProvider::class,
         App\Providers\AppServiceProvider::class,
         App\Providers\AuthServiceProvider::class,
-        //App\Providers\BladeServiceProvider::class,
+        App\Providers\BladeServiceProvider::class,
         //App\Providers\BroadcastServiceProvider::class,
         App\Providers\ComposerServiceProvider::class,
         App\Providers\EventServiceProvider::class,

resources/views/backend/layouts/app.blade.php

@@ -19,11 +19,12 @@
 
         <!-- Check if the language is set to RTL, so apply the RTL layouts -->
         <!-- Otherwise apply the normal LTR layouts -->
-        @langRTL
+        @langrtl
             {{ Html::style(getRtlCss(mix('css/backend.css'))) }}
         @else
             {{ Html::style(mix('css/backend.css')) }}
-        @endif
+        @endlangrtl
+
         {{ Html::style(mix('css/backend-custom.css')) }}
         @yield('after-styles')
 

resources/views/frontend/layouts/app.blade.php

@@ -20,11 +20,12 @@
 
         <!-- Check if the language is set to RTL, so apply the RTL layouts -->
         <!-- Otherwise apply the normal LTR layouts -->
-        @langRTL
+        @langrtl
             {{ Html::style(getRtlCss(mix('css/frontend.css'))) }}
         @else
             {{ Html::style(mix('css/frontend.css')) }}
-        @endif
+        @endlangrtl
+
        {!! Html::style('js/select2/select2.min.css') !!}
         @yield('after-styles')
 

resources/views/vendor/log-viewer/_template/master.blade.php

@@ -13,11 +13,11 @@
 
         <!-- Check if the language is set to RTL, so apply the RTL layouts -->
         <!-- Otherwise apply the normal LTR layouts -->
-        @langRTL
+        @langrtl
             {{ Html::style(getRtlCss(mix('css/backend.css'))) }}
         @else
             {{ Html::style(mix('css/backend.css')) }}
-        @endif
+        @endlangrtl
         {!! Html::style('css/custom-style.css') !!}
         @yield('after-styles-end')