Get contents through proxy using curl or guzzle - tested wit bestproxyandvpn.com

.env

PROXY_USER=...
PROXY_PASS=....
PROXY_IP=185.XXX.XXX.XXX
PROXY_PORT=37257

composer.json

{
    "name": "24hoursmedia/proxy-test",
    "require": {
        "vlucas/phpdotenv": "^2.5",
        "guzzlehttp/guzzle": "^6.3"
    }
}

proxy-curl-example.php

<?php
/**
 * Request through a Best VPN proxy using curl
 */
require __DIR__ . '/../vendor/autoload.php';
$dotenv = new Dotenv\Dotenv(__DIR__ . '/../');
$dotenv->load();

$PROXY_IP = getenv('PROXY_IP');
$PROXY_PORT = getenv('PROXY_PORT');
$PROXY_USER = getenv('PROXY_USER');
$PROXY_PASS = getenv('PROXY_PASS');

$url = 'https://manytools.org/http-html-text/http-request-headers/';

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_PROXY, $PROXY_IP);
curl_setopt($ch, CURLOPT_PROXYPORT, $PROXY_PORT);
curl_setopt($ch, CURLOPT_PROXYUSERNAME, $PROXY_USER);
curl_setopt($ch, CURLOPT_PROXYPASSWORD, $PROXY_PASS);
$result = curl_exec($ch);

proxy-guzzle-example

<?php
/**
 * Request through a Best VPN proxy using guzzle
 */
require __DIR__ . '/../vendor/autoload.php';
use GuzzleHttp\Client;

$dotenv = new Dotenv\Dotenv(__DIR__ . '/../');
$dotenv->load();

$PROXY_IP = getenv('PROXY_IP');
$PROXY_PORT = getenv('PROXY_PORT');
$PROXY_USER = getenv('PROXY_USER');
$PROXY_PASS = getenv('PROXY_PASS');

$url = 'https://manytools.org/http-html-text/http-request-headers/';
$proxyClient = new Client([
    'proxy' => rawurlencode($PROXY_USER) . ':' . rawurlencode($PROXY_PASS) . '@' . $PROXY_IP . ':' . $PROXY_PORT,
    'headers' => [
        'User-Agent' => 'my simulated user agent'
    ]
]);

$result = $proxyClient->get($url)->getBody()->getContents();
echo $result;