1Before starting this hope you installed composer dependancy manager for PHP.
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3So if you want to create a project by name of 'first_laravel_app' in directory C:/xampp/htdocs/ then what you need to do is
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5Locate your project parent directory using cmd
6>cd c:/xampp/htdocs
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8and fire this command
9>composer create-project laravel/laravel first_laravel_app --prefer-dist
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11And its done, this is really easy and it also creates Application Key automatically for you.
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13# I hope it will help you.
14# Namaste