Thank you Response Mr.J
But it's not working.
I don't have that file autoload.php file .So i Run Composer install command
It shows Some problems
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Installation request for erusev/parsedown 1.7.1 -> satisfiable by erusev/parsedown[1.7.1].
- erusev/parsedown 1.7.1 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
Problem 2
- Installation request for laravel/framework v5.7.13 -> satisfiable by laravel/framework[v5.7.13].
- laravel/framework v5.7.13 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
Problem 3
- Installation request for phar-io/manifest 1.0.3 -> satisfiable by phar-io/manifest[1.0.3].
- phar-io/manifest 1.0.3 requires ext-dom * -> the requested PHP extension dom is missing from your system.
Problem 4
- Installation request for phpunit/php-code-coverage 6.1.4 -> satisfiable by phpunit/php-code-coverage[6.1.4].
- phpunit/php-code-coverage 6.1.4 requires ext-dom * -> the requested PHP extension dom is missing from your system.
Problem 5
- Installation request for phpunit/phpunit 7.4.4 -> satisfiable by phpunit/phpunit[7.4.4].
- phpunit/phpunit 7.4.4 requires ext-dom * -> the requested PHP extension dom is missing from your system.
Problem 6
- Installation request for theseer/tokenizer 1.1.0 -> satisfiable by theseer/tokenizer[1.1.0].
- theseer/tokenizer 1.1.0 requires ext-dom * -> the requested PHP extension dom is missing from your system.
Problem 7
- laravel/framework v5.7.13 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- beyondcode/laravel-dump-server 1.2.2 requires illuminate/console 5.6.*|5.7.*|5.8.* -> satisfiable by laravel/framework[v5.7.13].
- Installation request for beyondcode/laravel-dump-server 1.2.2 -> satisfiable by beyondcode/laravel-dump-server[1.2.2].