A few questions about Laravel and Composer?

Question

Composer

Hello. There are several questions about Laravel and Composer. Could you answer? 1. Why is there a folder
in my folder when I install Laravel via Composer ? As far as I know, symfony is not a library, but a different framework altogether. 2. I tried to install a project written in Laravel: . I have followed all the instructions on this page. The project is installed, but it does not have a front-end. I see just a white page with text and sometimes pictures. I am attaching a screenshot.vendorsymfony
https://github.com/jcc/blog

Website without front-end

3. I write composer help and I get a message:

Warning: PHP Startup: Unable to load dynamic library 'php_pdflib.dll' (tried: d:/1develop/modules/php/PHP-7.2-x64/ext/php_pdflib.dll (═х эрщфхэ єърчрээ√щ ьюфєы№.
), d:/1develop/modules/php/PHP-7.2-x64/ext/php_php_pdflib.dll.dll (═х эрщфхэ єърчрээ√щ ьюфєы№.
)) in Unknown on line 0

I read on the Internet, this message is related to the fact that php_pdflib.dll is only for x86, but not for x64. And I have x64. I have a question. What problems can be with the fact that I do not have this library? How will this affect work? Something will fail / not work? Is there any way to install it on x64? And if so, how?
4. Why is this displayed in the message in the third question:
═х эрщфхэ єърчрээ√щ ьюфєы№
It seems to me that this should not be. How to fix it?

Answer 1

═х ershfhe єърчрээ√ш юфєы№ = The specified module ( decoder ) was not found
Symfony is not just a framework, it is a collection of various components (packages) . The Laravel framework uses these components as well.
What OC and version? Server requirements met:

• PHP >= 7.1.0
  
• Node >= 6.x
  
• OpenSSL PHP Extension
  
• PDO PHP Extension
  
• Mbstring PHP Extension
  
• Tokenizer PHP Extension
  
• XML PHP Extension
  

?
Try to install pdflib from here , just find the right version of lib for your version of PHP. And enable it in php config.
Instructions for installing extensions.