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🗣 Wd提问: php curl proxy

🤖 Ai回答:
In PHP, you can use cURL to make HTTP requests through a proxy server、This is useful for anonymizing requests, bypassing geo-restrictions, or testing behind corporate firewalls.

Here’s how to set up a cURL request with a proxy in PHP:

✅ Basic cURL with HTTP Proxy

php
<?php

$ch = curl_init();

// The target URL you want to access
curl_setopt($ch, CURLOPT_URL, https://httpbin.org/ip);

// Set the proxy server (format: host:port)
curl_setopt($ch, CURLOPT_PROXY, 123.45.67.89:8080);

// Optional: If your proxy requires authentication
curl_setopt($ch, CURLOPT_PROXYUSERPWD, username:password);

// Optional: Specify proxy type (HTTP, SOCKS4, SOCKS5)
// Default is HTTP, but you can explicitly set:
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);

// Follow redirects (optional)
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

// Return the response instead of outputting it
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// Set a user agent (some proxies/sites block bots)
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36');

// Optional: Set timeout
curl_setopt($ch, CURLOPT_TIMEOUT, 30);

// Execute the request
$response = curl_exec($ch);

// Check for errors
if (curl_errno($ch)) {
echo 'cURL error: ' 、curl_error($ch);
} else {
echo Response:\n 、$response;
}

// Close the cURL handle
curl_close($ch);

🔐 Proxy with Authentication (Basic Auth)

If your proxy requires username/password:

php
curl_setopt($ch, CURLOPT_PROXY, proxy.65.hk:8080);
curl_setopt($ch, CURLOPT_PROXYUSERPWD, myuser:mypassword);

💡 Note: `CURLOPT_PROXYUSERPWD` uses Basic Authentication、Make sure your proxy supports it.

🌐 SOCKS Proxy (SOCKS4 / SOCKS5)

For SOCKS proxies (common with Tor or SSH tunnels):

php
// For SOCKS5
curl_setopt($ch, CURLOPT_PROXY, 127.0.0.1:9050); // Tor default
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);

// For SOCKS4
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);

✅ `CURLPROXY_SOCKS5_HOSTNAME` resolves DNS through the proxy (recommended for anonymity)、
`CURLPROXY_SOCKS5` resolves DNS locally — less anonymous.

🛡️ HTTPS Proxy (HTTPS Tunnel)

Some proxies support HTTPS tunneling (e.g., corporate proxies):

php
curl_setopt($ch, CURLOPT_PROXY, https://proxy.company.com:8080);

Note: This is rare — most proxies are HTTP or SOCKS、Use `CURLOPT_PROXYTYPE` if needed.

🧪 Test with Public Proxy (for learning)

You can test with free public proxies (use responsibly and ethically):

[https://free-proxy-list.net](https://free-proxy-list.net)
[https://www.sslproxies.org](https://www.sslproxies.org)

Example using a public proxy:

php
curl_setopt($ch, CURLOPT_PROXY, 139.59.207.187:8080);

⚠️ Public proxies are often slow, unreliable, or malicious、Don’t use them for sensitive tasks.

✅ Best Practices

| Tip | Description |

| Use timeouts | Prevent hanging requests: `CURLOPT_TIMEOUT`, `CURLOPT_CONNECTTIMEOUT` |
| Verify SSL | Use `CURLOPT_SSL_VERIFYPEER` and `CURLOPT_SSL_VERIFYHOST` in production |
| Rotate proxies | For scraping: rotate multiple proxies to avoid bans |
| Check proxy status | Test if proxy works before using it (`curl_getinfo()` helps) |
| Avoid public proxies for sensitive data | They can log your traffic |

🔍 Check if Proxy is Working

After `curl_exec()`, check response info:

php
$info = curl_getinfo($ch);
echo HTTP Code: 、$info['http_code'] 、\n;
echo Proxy used: 、($info['proxy_ssl_verifyresult'] ? 'Yes' : 'No') 、\n;

You can also check your public IP before and after to confirm proxy is working:

php
curl_setopt($ch, CURLOPT_URL, https://api.ipify.org);

📌 Bonus: Using a Proxy List (Random Rotation)

php
$proxies = [
192.168.1.1:8080,
10.0.0.5:3128,
203.123.45.67:80
];

$proxy = $proxies[array_rand($proxies)];

curl_setopt($ch, CURLOPT_PROXY, $proxy);

Let me know if you want to:
Use cURL with SOCKS5 + Tor
Rotate proxies automatically
Handle proxy authentication with NTLM
Use cURL in a loop with multiple proxies

I’m happy to help further!

Ai作答

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