PHP Crawler Example: Proxy IP to solve the request blocking problem

Hands-on with PHP crawlers to bypass site blocking

Recently, many brothers engaged in data crawling are asking why the target site was blacked out while crawling? This thing is frankly like going to the supermarket to try to eat - you try to eat a dozen times in a row and do not buy things, the security guards will certainly want to drive you away. The server found that a certain IP frequent request, naturally, to start the protection mechanism. This is the time to use ourThe Proxy IP MethodUp.

How did the proxy IP become a talisman?

Proxy IPs are the equivalent of getting your crawler ready for theCountless stuntmen.. When the main IP is blocked by the site, other IP can continue to top. It's like playing a game with unlimited resurrection hangs, as long as the IP pool is big enough, the site simply can't seal over.

// Sample basic crawler code (the version that gets blocked)
$url = 'https://target-site.com/data';
$html = file_get_contents($url);

// Secure version with ipipgo proxy
$proxy = '123.123.123.123:8888'; // fill in the proxy address provided by ipipgo here
$context = stream_context_create([
    'http' => [
        'proxy' => "tcp://$proxy",
        'request_fulluri' => true
    ]
]);
$html = file_get_contents($url, false, $context);

A practical guide to avoiding the pit

Many newbies tend to fall into these potholes:

1. Poor quality of representation: 9 out of 10 free proxies are bad, use ipipgo's survival detection interface to sift through them first!
2. Incorrect switching frequency: It is recommended to change the IP every 5-10 requests, depending on the sensitivity of the target website.
3. Header not disguised: Remember to randomize the User-Agent, so that the site doesn't find out it's the same person!

QA First Aid Kit

Q: What should I do if my proxy IP is not working?
A: This is why we recommend using ipipgo's dynamic proxy pool, they automatically refresh a batch of new IPs every 5 minutes, which is a lot less stressful than maintaining them yourself.

Q: How to check if the agent is available?
A: Write a test script to visit httpbin.org/ip to see if the returned IP is the same as the proxy IP. ipipipgo also comes with availability monitoring in the background.

Q: What should I do if I encounter a CAPTCHA?
A: This means that the frequency of IP switching is still too high, it is recommended that: 1. reduce the frequency of requests 2. increase the number of IP pools 3. on ipipgo's exclusive IP packages

Why ipipgo?

Lessons learned from over two years of use:
1. Low latency of domestic nodes (measured average 80ms)
2. Exclusive IP supports hourly purchase
3. With automatic failure retry mechanism
4. Customer service response faster than a delivery boy
They've recently put on a newIntelligent Routing Function, which automatically matches the fastest routes, is the equivalent of putting a turbocharger on a crawler.

Finally, a real case: before a friend to do price comparison website, with ordinary proxy every day was blocked 200 + times, replaced with ipipgo residential proxy, ran for 15 days without triggering the blocking. This thing is like a guerrilla war, as long as you have enough "troops" (IP number), the site simply can not be defended.