PHP Crawl: Proxy IP bypasses anti-crawl mechanism

When Crawler Meets Anti-Crawler: Proxy IP's Way Out of the Box

Crawlers understand that hard-written scripts that run and run suddenly403 ForbiddenThe first thing you need to do is to get rid of it. At this time do not rush to smash the keyboard, eighty percent is triggered by the site's anti-climbing mechanism. Let's nag today how to use proxy IP to the crawler to wear a cloak of invisibility.

The three axes of the anti-climbing mechanism

Most websites counter-crawl on these three tricks:
1. IP Frequency Monitoring: The same IP request too many times in a short period of time directly pull black
2. Request Feature Recognition: checking request headers, cookies for these identifiers
3. CAPTCHA interceptionI don't know what you're talking about.

The most deadly thing here is the IP restriction, many newbies fall into this. This time you need toproxy IPCome as a stand-in actor, especially with dynamic IP pools provided by specialized service providers like ipipgo, which are much more reliable than free proxies.

PHP Hands-on: putting wheels on the crawler

The following code demonstrates how to bypass the restriction using PHP + proxy IP. Pay attention to theCURLOPT_PROXYThis key parameter:

$url = 'https://目标网站.com';
$proxy = 'ipipgo.pro:8000'; // API interface for ipipgo
$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_PROXY, $proxy);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
]).

$response = curl_exec($ch);
if(curl_errno($ch)){
    echo 'Error message: '.curl_error($ch); }
}
curl_close($ch);

Here's the kicker.ipipgo.pro:8000This proxy address, which is their exclusive intelligent scheduling interface, will automatically assign the available IP. it saves a lot of work than manually switching IPs, and also prevents the IP from being blocked.

Avoid the pit guide: the correct way to open the proxy IP

Pay attention to these details with a good proxy IP:

Special note: If using ipipgo'spay-per-use package, remember to add a failure retry mechanism in the code. Although they have 99% IP availability, multiple insurance is always right.

Frequently Asked Questions QA

Q: What should I do if the proxy IP is invalidated while I am using it?
A: In this case, it is recommended to use dynamic proxy services. For example, ipipgo's automatic IP rotation function, each request for a new IP, not at all give the site the opportunity to block.

Q：What kind of proxy should I choose if I need to crawl offshore websites?
A: Just go with ipipgo'sGlobal Mixing NodeWe will automatically match the optimal route. However, be careful to follow the website's terms of service, we only do compliant data collection.

Q: Slow proxy IP speed affects efficiency?
A: This depends on the quality of the service provider. Measured ipipgo's BGP line average response in 200ms or so, faster than many families at least 30%. if still too slow, you can add multi-threaded crawling.

Say something from the heart.

Crawler and anti-climbing is originally a cat and mouse game, the key is to take the initiative. Instead of struggling to toss a free agent, why not use a professional service like ipipgo, saving time to write a few more lines of code does not smell good? They send 1G of free traffic for new users, enough for small-scale testing.

Lastly, I would like to remind you that crawlers must be ethical, so don't hang people's websites. Control the frequency of requests, coupled with random delay, with high-quality proxy IP, this is the right way to sustainable development.