Composer "Download failed" Error - php

Question

i use xampp in Windows and my PHP Version is 5.5.15 .
need to install composer for Start work with laravel framework. but my problem is here, when i want install composer, be faced with this error :
Download failed: file_get_contents(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
file_get_contents(): Failed to enable crypto
file_get_contents(https://getcomposer.org/composer.phar): failed to open stream: operation failed
Download failed: file_get_contents(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
file_get_contents(): Failed to enable crypto
file_get_contents(https://getcomposer.org/composer.phar): failed to open stream: operation failed
Download failed: file_get_contents(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
file_get_contents(): Failed to enable crypto
file_get_contents(https://getcomposer.org/composer.phar): failed to open stream: operation failed
The download failed repeatedly, aborting.
What should I do?
and is there a way to install laravel without using composer ?

Answer 1

You basically have to set the environment variable SSL_CERT_FILE to the path of the PEM file of the ssl-certificate downloaded from the following link : http://curl.haxx.se/ca/cacert.pem.
It took me a lot of time to figure this out.
For a detailed answer, you can have a look here: https://stackoverflow.com/questions/34590842/cannot-install-composer-on-mac-os-x

Answer 2

If you are using Kaspersky, try to disable the Encrypted connection scanning (or set the Scan encrypted connections upon request from protection components option) and try again.
If you have the Always scan encrypted connections you can get errors like these:
[Composer\Downloader\TransportException]
The "https://packagist.org/packages.json" file could not be downloaded: SSL operation failed with code 1. OpenSSL Error messages:
error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed
Failed to enable crypto
failed to open stream: operation failed
[RuntimeException]
Failed to clone https://github.com/doctrine/inflector.git via https, ssh protocols, aborting.
- https://github.com/doctrine/inflector.git
Cloning into 'C:\Users\User\my-project\vendor\doctrine\inflector'...
fatal: unable to access 'https://github.com/doctrine/inflector.git/': SSL certificate problem: self signed certificate in certificate chain
- git#github.com:doctrine/inflector.git
Cloning into 'C:\Users\User\my-project\vendor\doctrine\inflector'...
Host key verification failed.
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.