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Q:

PHP set random variable from proxy list and Curl, if fail repeat

Hi there,

I've been trying to use proxies with PHP and Curl, but I'm having some trouble. I want to set a random proxy from a provided proxy list and then make a Curl request. However, if that request fails, I want to repeat the process with a different random proxy from the list until I get a successful response.

I've already done some research and found a few solutions, but none of them seem to work for me. I'm hoping someone here can help point me in the right direction.

To give you a little more context, I have a list of proxies stored in an array. The format of the array is like this:

```
$proxyList = array(
array('127.0.0.1', '8080', 'username', 'password'),
array('185.200.123.4', '3128', 'username', 'password'),
// more proxies...
);
```

So far, I've attempted to use `array_rand()` to select a random proxy from the list, but I'm not sure how to properly integrate it with Curl and handle the retry logic. Here's an example of what I've tried:

```php
// Select a random proxy from the list
$randomProxy = $proxyList[array_rand($proxyList)];

// Set up Curl with the selected proxy
$ch = curl_init();
curl_setopt($ch, CURLOPT_PROXY, $randomProxy[0]);
curl_setopt($ch, CURLOPT_PROXYPORT, $randomProxy[1]);
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $randomProxy[2] . ':' . $randomProxy[3]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

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

// Check if the request failed
if(curl_errno($ch)) {
// Retry with a different random proxy
// But I'm not sure how to properly set this up
// Any help would be greatly appreciated!
}

// Close the Curl connection
curl_close($ch);
```

I know there must be a way to achieve this, but I can't seem to figure it out on my own. If you have any suggestions on how to set a random proxy from the list and repeat the Curl request until it succeeds, I would be really grateful!

Thank you in advance for your help.

All Replies

deckow.godfrey

User 1:
Hey there!

I've faced a similar challenge before, and I found a solution that worked for me. Instead of using the `curl_errno()` function, I used the `curl_getinfo()` function to check the HTTP response code. If the response code indicated a failure, I could then retry the request with a different random proxy.

Here's an updated version of your code, incorporating these changes:

php
// Select a random proxy from the list
$randomProxy = $proxyList[array_rand($proxyList)];

// Set up Curl with the selected proxy
$ch = curl_init();
curl_setopt($ch, CURLOPT_PROXY, $randomProxy[0]);
curl_setopt($ch, CURLOPT_PROXYPORT, $randomProxy[1]);
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $randomProxy[2] . ':' . $randomProxy[3]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

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

// Check the HTTP response code
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

// Retry if the request fails
if ($httpCode >= 400) {
// Select a new random proxy
$randomProxy = $proxyList[array_rand($proxyList)];

// Update Curl options with the new proxy
curl_setopt($ch, CURLOPT_PROXY, $randomProxy[0]);
curl_setopt($ch, CURLOPT_PROXYPORT, $randomProxy[1]);
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $randomProxy[2] . ':' . $randomProxy[3]);

// Retry the request
$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

if ($httpCode >= 400) {
// Handle the failure as you need
// You can choose to try again or log the error
}
}

// Close the Curl connection
curl_close($ch);


This way, if the HTTP response code suggests a failure (code 400 or above), we can select a new random proxy and retry the request. By updating the Curl options and executing the request again, we have a chance to get a successful response.

I hope this solution works for you too! Let me know if you have any further questions.

mcdermott.macey

User 2:
Greetings!

I came across a similar situation a while ago, and I tackled it by implementing a recursive function. This approach made it easier for me to retry the request with a different random proxy until I got a successful response.

Here's how I modified your code to incorporate this recursive solution:

php
function makeRequest($proxies)
{
// Select a random proxy from the list
$randomProxy = $proxies[array_rand($proxies)];

// Set up Curl with the selected proxy
$ch = curl_init();
curl_setopt($ch, CURLOPT_PROXY, $randomProxy[0]);
curl_setopt($ch, CURLOPT_PROXYPORT, $randomProxy[1]);
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $randomProxy[2] . ':' . $randomProxy[3]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// Make the request
$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

// Check if the request failed and retry if necessary
if ($httpCode >= 400) {
// Retry with a new random proxy
$response = makeRequest($proxies);
}

// Close the Curl connection
curl_close($ch);

return $response;
}

// Call the function to make the initial request
$result = makeRequest($proxyList);


By encapsulating the request logic within a function called `makeRequest()`, we can easily call the function recursively in case of a failure. This way, we keep trying with different random proxies until we receive a successful response.

Make sure to pass in the proxy list to the `makeRequest()` function. The function will return the response obtained from a successful request.

I hope this approach helps you out with your proxy-related Curl requests! Feel free to ask if you have any further queries.

telly.moen

User 3:
Hey everyone,

I recently dealt with a similar issue and found an alternative approach to handle the random proxy selection and retry logic. Instead of using the `array_rand()` function, I used the `shuffle()` function to randomize the order of the proxy list. This way, I could simply iterate through the shuffled list and retry the request with each proxy until I obtained a successful response.

Here's an example of how I implemented this solution:

php
// Shuffle the proxy list
shuffle($proxyList);

// Set up Curl
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// Iterate through the shuffled proxy list
foreach ($proxyList as $proxy) {
// Set up Curl with the current proxy
curl_setopt($ch, CURLOPT_PROXY, $proxy[0]);
curl_setopt($ch, CURLOPT_PROXYPORT, $proxy[1]);
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxy[2] . ':' . $proxy[3]);

// Make the request
$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

// Check if the request was successful
if ($httpCode < 400) {
// Successful response received, break the loop
break;
}
}

// Close the Curl connection
curl_close($ch);

// Process the successful response if available
if ($response) {
// Your code to handle the successful response goes here
} else {
// All proxy attempts failed, handle this scenario
}


By shuffling the proxy list, we ensure that each time we run the code, we will try a different random order of the proxies. We loop through the shuffled list, setting up Curl with each proxy and making the request. The loop continues until we receive a successful response (HTTP code less than 400) or we exhaust all the proxies.

In the end, if we have a successful response, we can process it as desired. If all proxy attempts fail, you can handle that scenario accordingly.

I hope my experience provides you with an alternative perspective to tackle your proxy and Curl issue! Let me know if you have any further questions.

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