Installing Guzzle : PHP Laravel

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//Installing Guzzle
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The recommended way to install Guzzle is through Composer.

# Install Composer
curl -sS https://getcomposer.org/installer | php

Next, run the Composer command to install the latest stable version of Guzzle:

php composer.phar require guzzlehttp/guzzle

After installing, you need to require Composer's autoloader:

require 'vendor/autoload.php';

You can then later update Guzzle using composer:

php composer.phar update