Add comprehensive PHP proxy examples

README.md

@@ -5,6 +5,7 @@ Example code for using proxy servers in different programming languages. Current
 * Python
 * JavaScript / Node.js
 * Ruby
+* PHP
 
 ## Python Proxy Examples
 
@@ -119,8 +120,87 @@ node javascript/run_tests.js axios got
 
 ## Ruby Proxy Examples
 
+These examples use [Bundler](https://bundler.io/). Install Ruby development headers and libcurl first so native extensions can compile (Debian/Ubuntu: `ruby-dev` and `libcurl4-openssl-dev`; Fedora: `ruby-devel` and `libcurl-devel`).
+
+```bash
+cd ruby
+bundle install
+```
+
+**Running examples:**
+
+```bash
+# Required: set your proxy URL
+export PROXY_URL='http://user:pass@proxy.example.com:8080'
+
+# Optional: target URL (default: https://api.ipify.org?format=json)
+export TEST_URL='https://httpbin.org/ip'
+
+# Optional: print one response header
+export RESPONSE_HEADER='X-ProxyMesh-IP'
+
+# Single example (from ruby/)
+bundle exec ruby faraday-proxy.rb
+
+# All examples as tests
+bundle exec ruby run_tests.rb
+
+# Specific examples
+bundle exec ruby run_tests.rb faraday typhoeus
+```
+
+**Examples:**
+
+| Library | Example | Description |
+|---------|---------|-------------|
+| [Net::HTTP](https://docs.ruby-lang.org/en/master/Net/HTTP.html) (stdlib) | [net-http-proxy.rb](ruby/net-http-proxy.rb) | Low-level HTTP with proxy (`Net::HTTP.new` + proxy host/port/user/pass) |
+| [Faraday](https://lostisland.github.io/faraday/) | [faraday-proxy.rb](ruby/faraday-proxy.rb) | Middleware-style client; `Faraday.new(proxy: url)` |
+| [HTTParty](https://github.com/jnunemaker/httparty) | [httparty-proxy.rb](ruby/httparty-proxy.rb) | Simple API; `http_proxyaddr` / `http_proxyport` / credentials |
+| [HTTP.rb](https://github.com/httprb/http) | [http-rb-proxy.rb](ruby/http-rb-proxy.rb) | Lightweight DSL; proxy via `HTTP.via(host, port, user, pass)` |
+| [RestClient](https://github.com/rest-client/rest-client) | [rest-client-proxy.rb](ruby/rest-client-proxy.rb) | Simple REST API; proxy via `RestClient.proxy = url` |
+| [Typhoeus](https://github.com/typhoeus/typhoeus) | [typhoeus-proxy.rb](ruby/typhoeus-proxy.rb) | libcurl via Ethon; `proxy:` URL on the request |
+| [Excon](https://github.com/excon/excon) | [excon-proxy.rb](ruby/excon-proxy.rb) | Fast client; `Excon.get(url, proxy: url)` |
+| [HTTPClient](https://github.com/nahi/httpclient) | [httpclient-proxy.rb](ruby/httpclient-proxy.rb) | LWP-like client; pass full proxy URL to `HTTPClient.new` |
+| [Mechanize](https://github.com/sparklemotion/mechanize) | [mechanize-proxy.rb](ruby/mechanize-proxy.rb) | Crawling / forms; `set_proxy(host, port, user, password)` |
+| [Nokogiri](https://nokogiri.org/) | [nokogiri-proxy.rb](ruby/nokogiri-proxy.rb) | Parse HTML after a proxied `Net::HTTP` fetch |
+
+Libraries above are actively maintained on RubyGems (releases within the last year as of early 2026). Like most high-level Ruby HTTP clients, they do not expose custom headers on the HTTPS `CONNECT` tunnel to the proxy or proxy response headers; for ProxyMesh-style custom proxy headers, lower-level clients or a dedicated helper library may be required.
+
+## PHP Proxy Examples
+
 **Installation:**
 
+```bash
+cd php
+composer install
+```
+
+**Running Examples:**
+
+```bash
+# Required: Set your proxy URL
+export PROXY_URL='http://user:pass@proxy.example.com:8080'
+
+# Run a single example
+php php/guzzle_proxy.php
+
+# Run all examples as tests
+php php/run_tests.php
+```
+
+**Examples:**
+
+| Library | Example | Description |
+|---------|---------|-------------|
+| [cURL](https://www.php.net/manual/en/book.curl.php) | [curl_proxy.php](php/curl_proxy.php) | PHP's built-in HTTP client (libcurl) |
+| [Guzzle](https://docs.guzzlephp.org/) | [guzzle_proxy.php](php/guzzle_proxy.php) | Most popular PHP HTTP client |
+| [Symfony HttpClient](https://symfony.com/doc/current/http_client.html) | [symfony_http_client_proxy.php](php/symfony_http_client_proxy.php) | Modern PSR-18 HTTP client |
+| [Buzz](https://github.com/kriswallsmith/Buzz) | [buzz_proxy.php](php/buzz_proxy.php) | Simple PSR-18 HTTP client |
+| [PHP Streams](https://www.php.net/manual/en/book.stream.php) | [streams_proxy.php](php/streams_proxy.php) | Built-in PHP streams (file_get_contents) |
+| [Amp HTTP](https://amphp.org/http-client) | [amphp_proxy.php](php/amphp_proxy.php) | Async HTTP client |
+
+> **Note:** See [php-proxy-headers](https://github.com/proxymeshai/php-proxy-headers) for extensions that add custom proxy header support.
+
 These examples use [Bundler](https://bundler.io/). Install Ruby development headers and libcurl first so native extensions can compile (Debian/Ubuntu: `ruby-dev` and `libcurl4-openssl-dev`; Fedora: `ruby-devel` and `libcurl-devel`).
 
 ```bash
@@ -189,7 +269,7 @@ More examples and language-specific proxy-header tooling:
 
 ## Contributing
 
-Contributions are welcome for all supported languages in this repository (Python, JavaScript, and Ruby), as well as new language examples.
+Contributions are welcome for all supported languages in this repository (Python, JavaScript, Ruby, and PHP), as well as new language examples.
 
 When opening a Pull Request:
 

php/amphp_proxy.php

@@ -0,0 +1,52 @@
+#!/usr/bin/env php
+<?php
+/**
+ * Amp HTTP Client with proxy example.
+ *
+ * Configuration via environment variables:
+ *   PROXY_URL  - Proxy URL (required), e.g., http://user:pass@proxy:8080
+ *   TEST_URL   - URL to request (default: https://api.ipify.org?format=json)
+ *
+ * Amp HTTP Client is an async HTTP client for PHP. It supports proxies
+ * but does NOT support custom CONNECT headers or reading proxy response headers.
+ */
+
+require_once __DIR__ . '/vendor/autoload.php';
+require_once __DIR__ . '/common.php';
+
+use Amp\Http\Client\HttpClientBuilder;
+use Amp\Http\Client\Request;
+use Amp\Http\Client\Connection\DefaultConnectionFactory;
+use Amp\Http\Client\Connection\UnlimitedConnectionPool;
+use Amp\Http\Tunnel\Http1TunnelConnector;
+
+$proxyUrl = get_proxy_url();
+
+$testUrl = getenv('TEST_URL') ?: 'https://api.ipify.org?format=json';
+
+$parsedProxy = parse_url($proxyUrl);
+$proxyHost = $parsedProxy['host'];
+$proxyPort = $parsedProxy['port'] ?? 8080;
+
+try {
+    $tunnelHeaders = [];
+    if (isset($parsedProxy['user'])) {
+        $credentials = $parsedProxy['user'] . ':' . ($parsedProxy['pass'] ?? '');
+        $tunnelHeaders['Proxy-Authorization'] = 'Basic ' . base64_encode($credentials);
+    }
+    $connector = new Http1TunnelConnector("{$proxyHost}:{$proxyPort}", $tunnelHeaders);
+    $pool = new UnlimitedConnectionPool(new DefaultConnectionFactory($connector));
+
+    $client = (new HttpClientBuilder())
+        ->usingPool($pool)
+        ->build();
+
+    $request = new Request($testUrl);
+    $response = $client->request($request);
+
+    echo "Status: " . $response->getStatus() . "\n";
+    echo "Body: " . $response->getBody()->buffer() . "\n";
+} catch (Exception $e) {
+    fwrite(STDERR, "Error: " . $e->getMessage() . "\n");
+    exit(1);
+}

php/buzz_proxy.php

@@ -0,0 +1,41 @@
+#!/usr/bin/env php
+<?php
+/**
+ * Buzz with proxy example.
+ *
+ * Configuration via environment variables:
+ *   PROXY_URL  - Proxy URL (required), e.g., http://user:pass@proxy:8080
+ *   TEST_URL   - URL to request (default: https://api.ipify.org?format=json)
+ *
+ * Buzz is a simple PSR-18 HTTP client. It supports proxies but does NOT
+ * support custom CONNECT headers or reading proxy response headers.
+ */
+
+require_once __DIR__ . '/vendor/autoload.php';
+require_once __DIR__ . '/common.php';
+
+use Buzz\Browser;
+use Buzz\Client\Curl;
+use Nyholm\Psr7\Factory\Psr17Factory;
+
+$proxyUrl = get_proxy_url();
+
+$testUrl = getenv('TEST_URL') ?: 'https://api.ipify.org?format=json';
+
+try {
+    $psr17Factory = new Psr17Factory();
+
+    $client = new Curl($psr17Factory, [
+        'proxy' => $proxyUrl,
+        'timeout' => 30,
+    ]);
+
+    $browser = new Browser($client, $psr17Factory);
+    $response = $browser->get($testUrl);
+
+    echo "Status: " . $response->getStatusCode() . "\n";
+    echo "Body: " . $response->getBody() . "\n";
+} catch (Exception $e) {
+    fwrite(STDERR, "Error: " . $e->getMessage() . "\n");
+    exit(1);
+}

php/common.php

@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * Shared helpers for PHP proxy examples.
+ */
+
+function normalize_proxy_url(string $value): string
+{
+    $trimmed = trim($value);
+    if ($trimmed === '') {
+        return '';
+    }
+
+    if (!preg_match('/^[a-z][a-z0-9+\-.]*:\/\//i', $trimmed)) {
+        $trimmed = "http://{$trimmed}";
+    }
+
+    $parts = parse_url($trimmed);
+    if (!is_array($parts) || empty($parts['host'])) {
+        return '';
+    }
+
+    $scheme = $parts['scheme'] ?? 'http';
+    $host = $parts['host'];
+    $port = $parts['port'] ?? 31280;
+    $user = $parts['user'] ?? null;
+    $pass = $parts['pass'] ?? null;
+
+    $auth = '';
+    if ($user !== null) {
+        $auth = rawurlencode($user);
+        if ($pass !== null) {
+            $auth .= ':' . rawurlencode($pass);
+        }
+        $auth .= '@';
+    }
+
+    return sprintf('%s://%s%s:%d', $scheme, $auth, $host, $port);
+}
+
+function get_proxy_url(): string
+{
+    $raw = getenv('PROXY_URL') ?: getenv('HTTPS_PROXY');
+    if (!$raw) {
+        fwrite(STDERR, "Error: Set PROXY_URL environment variable\n");
+        exit(1);
+    }
+
+    $normalized = normalize_proxy_url($raw);
+    if ($normalized === '') {
+        fwrite(STDERR, "Error: Invalid PROXY_URL value\n");
+        exit(1);
+    }
+
+    return $normalized;
+}

php/composer.json

@@ -0,0 +1,24 @@
+{
+    "name": "proxymesh/proxy-examples-php",
+    "description": "PHP proxy usage examples",
+    "type": "project",
+    "license": "MIT",
+    "require": {
+        "php": ">=8.1",
+        "guzzlehttp/guzzle": "^7.8",
+        "symfony/http-client": "^7.0",
+        "php-http/guzzle7-adapter": "^1.0",
+        "nyholm/psr7": "^1.8",
+        "kriswallsmith/buzz": "^1.2",
+        "amphp/http-client": "^5.0",
+        "amphp/http-tunnel": "^2.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "ProxyExamples\\": "src/"
+        }
+    },
+    "scripts": {
+        "test": "php run_tests.php"
+    }
+}